Personal Care Services (U.S.) — Industry-Group Primer

NAICS 2022 code 8121 — Personal Care Services. NAICS is the North American Industry Classification System, the standard code U.S. statistical agencies use to group businesses. This is a four-digit industry group — one level up from an industry — and it rolls up two five-digit industries: 81211, Hair, Nail, and Skin Care Services (barber shops, beauty salons, nail salons) and 81219, Other Personal Care Services (diet/weight-loss centers plus day spas, tanning, tattoo/piercing, waxing, non-medical massage, and the like).[1]

This primer synthesizes the two child-industry primers plus our ground-truth federal statistics for this level. It does not re-research the children from scratch — for the deep dive on either, see its own primer.

1. Overview

This is the "pay-a-person-to-tend-your-body" economy — everything non-medical you buy to look after your hair, nails, skin, weight, and appearance. It is one of the largest, most local, and most fragmented corners of U.S. consumer services: about 160,700 storefronts with employees, and vastly more one-person operators the federal count never sees, where a licensed or trained person performs an in-person service on a repeat customer.[2]

Three facts define the whole level for an investor:

• It is enormous by count and tiny by ownership. About $54.8 billion in reported (employer) receipts is spread across ~140,600 firms, so the average business is a ~$341,000-a-year shop with fewer than five employees.[2][3] There is essentially no scaled public company that owns this level; the biggest listed names are national diet brands in distress and a couple of salon micro-caps.
• It is two very different businesses bolted together. ~71% of the money is the hyper-fragmented "chair" economy of hair, nail, and skin care (81211); the other ~29% (81219) is a barbell — a large, growing, equally fragmented personal-care-services base (spas, waxing, massage, tattoo) fused to a small, concentrated diet-center niche now being disrupted by weight-loss drugs.
• Demand is resilient but not recession-proof. Much of it is non-deferrable maintenance — hair grows, nails chip, roots show — but in downturns customers stretch the interval, trade down, or do it themselves. The one shared shock in living memory was 2020, when personal-care services were ordered shut.

For public-market investors: there is no clean way in. The direct pure-plays are speculative — two salon micro-caps (Regis, MiniLuxe) and a set of turnaround diet stocks (WeightWatchers, Medifast) — and most real "exposure" is a bank shot through beauty retailers, product makers, franchisors, weight-loss-drug makers, and telehealth firms (Section 4).

For private investors: this is a private-market industry, and the richer opportunity set lives here — owning or buying a shop, becoming a multi-unit franchisee (a business owner who licenses a brand and system), building or backing a salon-suite or membership landlord platform, or backing a private-equity aesthetics roll-up (Section 10). The professional capital sits in the landlord, franchisor, product, and drug layers, not in the service chair itself.

2. What's inside — the two child industries and how they differ

The distinctive thing about this level is the contrast across the children. They share economics (trained/licensed labor, local demand, booth-rental vs. commission pay, membership models) but differ sharply in scale, direction, ownership, and how — or whether — you can invest. Shares below are of the employer-only federal totals for this level.

How to read the table. Hair, nail, and skin care (81211) is most of this level — roughly seven of every ten dollars, and nearly four of every five storefronts — so the level's headline economics are basically salon economics: licensed labor, local moats, thin margins, near-zero consolidation. The smaller child (81219) is where the level gets interesting and strange, because it is itself two opposite businesses: a fragmented, mostly growing services base (spas, waxing, massage, tattoo) and a concentrated, shrinking commercial-diet niche whose national brands are being disrupted by GLP-1 (glucagon-like peptide-1) weight-loss drugs — the Ozempic/Wegovy/Zepbound class.

A useful subtlety: the level's own concentration is not the average of its children's. The level's four-firm concentration ratio (CR4, the share of receipts held by the four largest firms) is 3.4% — higher than 81211's 1.7% but far below 81219's 11.3%.[3] You cannot average concentration ratios; the level's top four firms are the four biggest across the combined universe, and they are almost certainly the surviving national diet/nutrition brands. That they control only ~3.4% of the combined $54.8 billion tells you how thoroughly a few large brands are diluted once you drop them into a sea of ~140,000 local shops.

Where 8121 stops and the neighbors begin (so you don't double-count): cosmetology and barber schools are 611511; the retail of shampoo, polish, and press-on nails is manufacturing/retail, not a service. Most importantly, the fastest-growing money is migrating out of this code into health care (NAICS 621xxx): medical spas, injectables (Botox/fillers), laser hair removal, and physician-supervised or drug-prescribing weight-loss clinics are all classified as health care, not here.[1][5] This level captures the non-medical slice.

3. How big it is (this level's rollup figures)

Read the caveat first: these are employer-only figures, and they capture the corporate tip of a much larger, mostly self-employed iceberg. Federal business statistics — County Business Patterns (CBP, the Census annual establishment count) and the Economic Census (EC) — count only firms with paid employees on a payroll. This level is dominated by the opposite: booth renters, home studios, solo tattoo artists and estheticians, mobile operators, and one-person shops.

Core federal figures for NAICS 8121 (from our ground-truth ingested data; note they combine 2023 CBP with 2022 Economic Census concentration data, so they are a consistent picture of the level, not one perfectly synchronized single-year series):

The integrity check is clean: the two children sum to the level almost exactly on every countable metric (establishments 126,382 + 34,344 = 160,726; employees 568,140 + 196,500 = 764,640; receipts $38.69B + $16.06B = $54.76B).[4][5]

Concentration — a textbook fragmented level. The four largest firms hold 3.4% of receipts (CR4); the top 8 hold 4.7% (CR8); the top 20 hold 6.6% (CR20); the top 50 hold 8.6% (CR50); and the Herfindahl-Hirschman Index (HHI, the standard 0–10,000 concentration score where higher means more concentrated) is 5.3 — a hair above the theoretical floor for a competitive market.[3] Even those figures overstate concentration, because they exclude the vast self-employed base. Pay is low across the whole level — roughly $30,500 per employee — reflecting part-time, hourly, tip-heavy, and commission staff.[2]

The SBA (U.S. Small Business Administration) size standard is set at the child level and ranges from $9.0 million (nail salons, most personal-care services) to $27.5 million (diet centers) in average annual receipts — a classification line for program eligibility, not a profitability test.[6] Effectively every operator in the level qualifies as a small business.

The undercount — larger here than in most industries. CBP excludes the self-employed, businesses with no employees, and businesses without an employer identification number.[7] Several independent signals show how much sits outside the employer tables:

• The Bureau of Labor Statistics (BLS, the federal labor-data agency) counts roughly 575,200 barbers, hairstylists, and cosmetologists (about 37% self-employed — and ~76% in barbering specifically), 210,100 manicurists and pedicurists (~28% self-employed), plus tens of thousands of skincare specialists, massage therapists, and an estimated ~52,000 tattoo artists working in 2024.[8][9][10] Most of those solo operators never appear in the 764,640 employer-payroll count.
• Private industry research puts the broad U.S. hair-services universe alone near ~1 million businesses and ~$60 billion in 2025, with spas (~$22.5B), tanning (~$3.2B), and tattoo studios (~$4.5B) worth several billion more on top — all private estimates using boundaries that don't match the federal code, so read them as indicative, not additive.[11]

So the true footprint of this level is materially larger than the federal employer tables show: on the order of well over a million mostly one-person businesses and plausibly $90 billion or more of activity, of which the federal employer statistics see ~160,700 establishments and $54.8 billion. Treat the $54.8 billion as a floor, not a ceiling — and remember that the highest-growth spending (obesity drugs, medical aesthetics) is leaving the code entirely for health care, so the non-medical footprint understates how much Americans actually spend to look after their appearance.

4. The investable universe (where value concentrates across the children)

There is no scaled, liquid, U.S.-listed pure-play for this level, and the two children route to entirely different names. No public company reports revenue on a clean NAICS basis, so never read a listed company's sales as level or industry market share. Location counts below are brand-reported and are not equivalent to federal establishment counts (they may include Canada, adjacent services, and both company- and franchisee-owned units).

Hair / nail / skin half (81211) — micro-cap operators plus adjacent proxies:

Other personal care half (81219) — diet turnarounds, drug/telehealth winners, and suppliers:

Notable private brands, platforms, and owners (representative): Great Clips (~4,400 salons), Sport Clips (~1,900 units), Sola Salon Studios (PE-backed salon-suite franchisor), Hair Cuttery and Regal Nails on the hair/nail side; and European Wax Center (taken private by General Atlantic in 2026), Massage Envy, Hand & Stone, Palm Beach Tan, plus PE aesthetics roll-ups (Milan Laser, LaserAway, Ideal Image) on the other side.[21][22]

Where value concentrates. Follow the money and it flows away from the service chair in both children, but to different destinations. In 81211 it pools in franchisors (asset-light royalties) and salon-suite landlords (a labor business turned into a rent roll) — the clearest magnets for private equity — plus product and retail picks-and-shovels. In 81219 the personal-care base looks the same (franchisors + PE aesthetics platforms), but the diet niche routes value to a few branded (and struggling) public companies and, far more powerfully, to the drug makers and telehealth firms that disintermediated them. Across the whole level, the chair-by-chair operating business — the ~140,000 firms themselves — is where the labor value accrues, not the investor value.

5. How the money works

Because the children differ, the level has no single business model — but three archetypes recur:

• The service operator (commission model). The shop employs practitioners, controls pricing and the customer relationship, and pays a percentage of each service (splits commonly ~40/60 up to ~70/30 in the worker's favor), keeping the remainder plus retail margin. More upside as a location grows — but the owner carries payroll, benefits, and labor-law exposure, and net margins often run in the low single digits.[4]
• The landlord (booth-/chair-/suite-rental model). The practitioner is an independent contractor who pays a fixed rent for a chair or private suite and keeps their own service revenue. The owner converts variable labor into predictable rent, carries almost no payroll, and is effectively a small-scale landlord — the model that attracted institutional capital because it turns a labor-heavy service into a real-estate-like income stream.[4]
• The subscription / membership model. In the diet niche, revenue is subscribers × price (retention-driven, with heavy January seasonality) or product markup on branded meals; in waxing, massage, and tanning it is recurring membership revenue. Membership is exactly why those niches consolidated into franchises while individual-artist businesses (tattoo, boutique salons) did not.[5]

The scorecard that matters is the same across the level and is not mainly "same-store sales" (most operators are single independents that never report comps): capacity × utilization × ticket (an empty chair, bed, or treatment room earns nothing but still pays rent), service mix (color, gel, and premium treatments carry far higher tickets than a basic cut), rebooking / retention, retail attachment, and rent as a share of sales. Tips are a large part of practitioner take-home and largely bypass the shop, which is why reported wages look low.[4][9]

At the franchisor and landlord level the economics flip to an asset-light stream: royalties (commonly ~6% of a franchisee's sales), franchise and marketing fees, or rent per suite — little store-level cost. One caution for public investors: reported franchisor revenue is not the same as system-wide sales, and diet-brand revenue bundles products, subscriptions, and telehealth — reconcile before comparing scale.[12][15] Shops change hands as small businesses on a low multiple of seller's discretionary earnings (SDE) — the owner-operator's total economic benefit — so an outside buyer's return hinges on retaining the practitioners and their client books.

6. What drives demand

• Biological recurrence (the resilient core). Hair grows, gel and acrylic need a fill, roots show. A large share of 81211 demand is non-deferrable maintenance on a short cycle, which makes this level more recession-resilient than most consumer services — but recurrence is not commitment. In downturns customers stretch the interval, trade down, or buy clippers.[23]
• The "self-care" normalization. Grooming, wellness, and appearance spending have shifted from luxury toward routine — a structural tailwind for hair, spa, waxing, massage, and aesthetics.[5]
• Grooming and social-media culture. A men's-grooming resurgence lifted barber tickets; TikTok/Instagram nail-art and beauty culture push customers toward higher-ticket services; selfie culture drives tattoos, brows, lashes, and injectable-adjacent work.
• Obesity and the GLP-1 drug shock (diet niche — dominant and double-edged). The Centers for Disease Control and Prevention (CDC) put adult obesity at 40.3% — a long-run tailwind for anything labeled weight loss.[24] But GLP-1 injectables deliver ~15–20% body-weight loss versus the low-single-digit results of behavioral programs, resetting expectations and pulling spending toward drugs and prescribing clinics. It is simultaneously the diet niche's biggest threat and, for players who integrate the drugs, its biggest opportunity.[18][19]
• Price and mix. Much recent growth is higher prices and premium services, not more visits — personal-care prices have risen faster than overall inflation for years, letting operators pass through wage and product costs.[23]
• Labor supply on both sides. Flexible, self-employed work sustains the booth-rental and suite models; nail salons in particular depend on a large immigrant technician workforce, so immigration policy directly affects capacity.[9]
• Segment-specific headwinds. Tanning is in secular decline (skin-cancer awareness, minor-use bans, self-tanning); and the DIY substitute (home color, clipper cuts, press-on nails) is the perennial demand leak in soft economies.[23]

As a labor-market clue (not a revenue forecast), BLS projects roughly +4–5% jobs for barbers/hairstylists/cosmetologists, +7% for manicurists, +7% for skincare specialists, and +15% for massage therapists over 2024–2034 — steady growth across most of the level, with the diet and tanning niches the exceptions.[8][9][10]

7. Regulation

Regulation across the level is primarily state and local, with a few federal overlays, and one boundary defines the whole thing: a business here must stay non-medical. The moment a spa performs injectables or laser under clinical supervision, or a diet center prescribes drugs, it moves into Health Care (Sector 62) with far heavier rules.[1][5] Beyond that boundary, the load falls in the same places across both children:

• Occupational licensing (state). Barbers, cosmetologists, nail technicians, estheticians, and massage therapists are licensed in every state — commonly ~900–2,100 training hours plus exams. High hour requirements are a live reform target (the emerging Cosmetology Licensure Compact is beginning to ease multi-state portability). For an investor, licensing is a structural supply constraint that caps workforce growth and props up wages.[8]
• Worker classification (federal + state). The booth-rental / suite model rests on practitioners being independent contractors. Misapplied, that invites reclassification as employees by the IRS (Internal Revenue Service), the U.S. Department of Labor (DOL) under the Fair Labor Standards Act (FLSA), or state agencies using stricter tests (California's "ABC" test). This is the single biggest regulatory risk to the dominant landlord model, carrying back-tax and back-wage exposure.[4]
• Franchise disclosure (federal). The Federal Trade Commission's (FTC) Franchise Rule requires a Franchise Disclosure Document (FDD) generally at least 14 days before a franchisee signs or pays — relevant to every franchised concept in the level.[25]
• Advertising and subscriptions (federal). The FTC also polices deceptive weight-loss claims (must be backed by competent, reliable scientific evidence) and auto-renewal / negative-option subscriptions — directly relevant to diet and membership models.[26]
• Health, chemical, and product safety (federal + state). State boards inspect for sanitation; the Occupational Safety and Health Administration (OSHA) adds bloodborne-pathogen rules (shaves, tattoos, piercing) and chemical-hazard rules (nail-salon "toxic trio," hair-smoothing formaldehyde). The Food and Drug Administration (FDA) regulates cosmetics (expanded by the Modernization of Cosmetics Regulation Act of 2022, MoCRA), dietary supplements, the GLP-1 drugs diet brands attach to, and sunlamp products — and indoor tanning carries a 10% federal excise tax plus minor-use bans in 44 states.[27][28]

For diligence across any of the children, the core documents are the same: active licenses, inspection history, contractor agreements, payroll and tip records, chemical-safety procedures, franchise disclosures, and (for diet/wellness) claims substantiation.

8. Competitive dynamics and consolidation

This is close to a textbook fragmented level — CR4 3.4%, HHI 5.3 — and because those figures exclude the huge self-employed base, the true market is even more fragmented.[3] But the reason it stays fragmented, and the way it consolidates, differ across the children:

• Hair / nail / skin (81211) — near-total fragmentation. Near-zero barriers to entry, minimal scale economies, and local personal moats (loyalty attaches to the individual practitioner, who can walk out the door with the client book). Consolidation is slow and takes two forms: franchising in hair (Great Clips, Sport Clips, Regis's shift to ~98% franchised) and salon-suite roll-ups that monetize the practitioner regardless of brand — the fastest-growing, most investable model and the clearest magnet for private equity. Nail salons have barely consolidated at all.[4][12][21]
• Other personal care (81219) — consolidating for opposite reasons on each side. The personal-care base (waxing, massage, tanning) consolidated through franchising of the membership-friendly niches, and private equity is now the dominant force in the med-spa/aesthetics adjacency (industry trackers cite 50+ deals a year against a base still 90%+ independent — a long runway). The diet niche, by contrast, is a distress-driven shakeout: Jenny Craig liquidated (2023), WW went through Chapter 11 (2025), and Medifast's revenue roughly halved — "consolidation" here is convergence with medicine as behavioral brands, telehealth natives, and drug makers collide.[5][15][22]

What resists consolidation everywhere in the level is the same: businesses whose value is an individual relationship — the barber, stylist, tattoo artist, or solo diet coach whose clientele is portable. A nationally atomized market can still be locally concentrated, so buyers must underwrite each trade area, lease, roster, and client book separately.

9. Risks

• Key-person / client-book risk. Across the level, clients follow the practitioner; when a booth renter leaves, their revenue leaves too — a structural churn problem that undermines roll-ups and a reason not to overpay for a shop whose sales depend on the selling owner.
• Worker-classification and wage-and-hour liability. Reclassifying booth renters / suite tenants as employees would upend the landlord model's economics; nail salons carry added wage-theft enforcement exposure.[4]
• Substitution / disruption (diet niche, existential). GLP-1 drugs directly replace the core value of a behavioral program; firms that don't integrate them face structural decline. The drug economics cut both ways (cheaper drugs or oral pills could crush programs further or expand the pool needing an adherence wrapper).[18]
• Discretionary trade-down and shutdown risk. Downturns stretch intervals and boost DIY; spa, tattoo, and tanning visits are early cuts; and a public-health shutdown closes the doors entirely, as 2020 showed.[23]
• Labor supply. Practitioner shortages, licensing frictions, and (in nails) immigration-enforcement sensitivity cap growth and squeeze commission-model margins.[8][9]
• Segment-specific secular decline. Tanning faces skin-cancer-driven bans and a federal excise tax.[28]
• Thin margins, rent inflation, and no scalability. Rent is the biggest fixed cost; running 50 shops is not meaningfully cheaper per shop than one, which caps outside-investor returns.
• PE roll-up / leverage risk. Elevated aesthetics multiples plus debt make returns depend on continued growth and multiple expansion; WW's bankruptcy shows even a recognizable brand can carry crushing leverage.[15][22]
• Micro-cap / illiquidity risk (public route). The direct pure-plays (Regis, MiniLuxe; and the diet turnarounds) are small, thinly traded, execution- and balance-sheet-heavy situations far riskier than the underlying industry.[12][13][15]
• Data caveat. Federal employer-only figures make market-size and concentration analysis look more precise than the true, largely non-employer, industry actually is — and the highest-growth spending is migrating out of the code into health care.

10. How to invest, and the outlook

The level is not a single trade — pick a lane. The two children (and the two halves of the second child) need different playbooks.

Public routes (thin, indirect, or speculative). There is no large-cap or pure-play stock for the level, and no exchange-traded fund (ETF) — it is too small and fragmented to have one.

• Hair / nail / skin: the direct pure-plays are speculative micro-caps (Regis, MiniLuxe); cleaner exposure is adjacent — a beauty retailer (Ulta), a products distributor (Sally Beauty), or product owners (Helen of Troy, Coty, L'Oréal).[12][13][14]
• Diet niche: higher-risk turnarounds (WeightWatchers, Medifast, Herbalife) or, more cleanly, the drug makers and telehealth firms that captured the demand (Novo Nordisk, Eli Lilly; Hims & Hers, LifeMD) — different business models, not interchangeable proxies.[15][16][17][18][19]
• Personal-care base: small or diversified operators (OneSpaWorld, XWELL) plus the aesthetics suppliers, most of which skew to the medical adjacency outside this code.[20][22]

Treat salon or spa exposure inside any diversified name as segment exposure, not a pure industry investment, and check each name's segment revenue, retention, and balance sheet.

Private routes (where the operating scale lives):

• Own or buy a shop on a low SDE multiple — but you are buying practitioners and their client books, so retention terms matter more than fixtures. Verify tax returns, bank deposits, merchant records, payroll, booth-rental agreements, lease terms, licensing, and normalized owner compensation.
• Become a multi-unit franchisee (Great Clips, Sport Clips, a salon-suite brand, a waxing/massage membership concept) — the most repeatable way to deploy capital. Read the FDD closely and call current and former franchisees.[21]
• Back a landlord or roll-up — a salon-suite landlord, a med-spa/aesthetics platform, or the real estate itself; steadier, real-estate-style cash flow that sidesteps the worst classification exposure.[22]
• Play the disruption directly in the diet niche — a cash-pay weight-loss clinic or a telehealth/behavioral platform wrapped around the drugs — but know that the clinical versions sit outside this non-medical code.

Before committing privately, request location-level monthly sales, service mix, rebooking/retention, practitioner tenure and classification, lease terms, licensing, inventory, claims substantiation, and owner add-backs. The central diligence question is the same across the level: does the cash flow survive the departure of the owner or a top practitioner?

Outlook (forward-looking judgment, not settled fact). The base case is a large, stable, hyper-fragmented level growing at low-to-mid single digits, with its two children diverging. Hair, nail, and skin care stays the resilient core — recurring maintenance demand, durable grooming culture, steady price increases, thin economics, and the best returns accruing to franchisors and suite landlords rather than the chair. Other personal care splits harder: spa, waxing, massage, and aesthetics grow modestly ahead of the consumer (with private-equity consolidation the near-term catalyst), tanning slowly declines, and the diet niche keeps shrinking as classically defined even as the underlying demand to lose weight has never been larger — the money is simply migrating into drugs, telehealth, and medical clinics that sit outside this code. The swing factors to watch across the whole level are labor supply, worker classification, consumer trade-down, and — uniquely for the diet niche — the trajectory of GLP-1 drugs. For most investors the takeaway is blunt: this is a collection of good small businesses and, mostly, poor public-market securities — the durable returns live with the person doing the service, the brand that franchises it, or the landlord who rents them the room.

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Sources

1. U.S. Census Bureau, NAICS 2022: 8121 Personal Care Services (and children 81211/81219 — definitions and adjacent-code exclusions, including health-care boundary). https://www.census.gov/naics/?input=8121&year=2022
2. U.S. Census Bureau, County Business Patterns, 2023 (NAICS 8121 — establishments 160,726; paid employees 764,640; annual payroll $23.358B; Q1 payroll $5.527B; via Histometrics ingested federal statistics). https://www.census.gov/programs-surveys/cbp.html
3. U.S. Census Bureau, 2022 Economic Census — Concentration of Largest Firms (NAICS 8121) (firms 140,553; receipts $54.756B; CR4 3.4%, CR8 4.7%, CR20 6.6%, CR50 8.6%; HHI 5.3; via Histometrics ingested federal statistics). https://data.census.gov/table/ECNSIZE2022
4. Child primer — NAICS 81211 Hair, Nail, and Skin Care Services (federal figures: receipts $38.69B [2022 EC], 126,382 establishments / 568,140 employees [2023 CBP], 112,541 firms, CR4 1.7%, HHI 1.1; booth-rental vs. commission economics; franchise and salon-suite consolidation).
5. Child primer — NAICS 81219 Other Personal Care Services (federal figures: receipts $16.063B [2022 EC], 34,344 establishments / 196,500 employees [2023 CBP], 28,073 firms, CR4 11.3%; diet-niche vs. personal-care-base "barbell"; GLP-1 disruption; health-care boundary).
6. U.S. Small Business Administration, Table of Small Business Size Standards (NAICS 812111/812112 = $9.5M; 812113/812199 = $9.0M; 812191 = $27.5M avg. annual receipts), 2023. https://www.sba.gov/document/support-table-size-standards
7. U.S. Census Bureau, County Business Patterns methodology / Nonemployer Statistics (employer-only coverage; self-employed and no-payroll businesses excluded). https://www.census.gov/programs-surveys/nonemployer-statistics/about/faq.html
8. U.S. Bureau of Labor Statistics, Occupational Outlook Handbook — Barbers, Hairstylists, and Cosmetologists (~575,200 employed; ~37% self-employed, ~76% for barbers; 2024–2034 projections; licensing). https://www.bls.gov/ooh/personal-care-and-service/barbers-hairstylists-and-cosmetologists.htm
9. U.S. Bureau of Labor Statistics, Occupational Outlook Handbook — Manicurists and Pedicurists (~210,100 employed; ~28% self-employed; +7% 2024–2034). https://www.bls.gov/ooh/personal-care-and-service/manicurists-and-pedicurists.htm
10. U.S. Bureau of Labor Statistics, Occupational Outlook Handbook — Skincare Specialists (+7%) and Massage Therapists (+15%), 2024–2034. https://www.bls.gov/ooh/personal-care-and-service/skincare-specialists.htm
11. IBISWorld / International Spa Association / ResearchAndMarkets, U.S. hair salons & barber shops (~1M businesses / ~$60B), spas (~$22.5B), tanning (~$3.2B), tattoo studios (~$4.5B; ~52,000 artists) — private estimates, non-matching boundaries, 2024–2025. https://www.ibisworld.com/united-states/industry/hair-salons/4410/
12. Regis Corporation, Form 10-K (FY2025) and 10-Q (SEC), with StockAnalysis.com (salon count, ~98% franchised model, brands). https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000716643&type=10-K
13. MiniLuxe Holding Corp., Full-Year Financial Results, GlobeNewswire, with StockAnalysis.com for market value. https://stockanalysis.com/quote/otc/MNLXF/
14. U.S. SEC filings — Ulta Beauty (ULTA), Sally Beauty (SBH); Retail Dive / Helen of Troy on Olive & June; Coty/L'Oréal product context. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001403568&type=10-K
15. U.S. SEC, WW International (WW) 2025 Form 10-K (Chapter 11 reorganization, ~$1.15B debt cut, GLP-1 pivot). https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000105319
16. U.S. SEC, Medifast (MED / OPTAVIA) 2025 Form 10-K (product sales ~96% of revenue; coach-distributor model; revenue roughly halved from peak). https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000910329
17. U.S. SEC, Herbalife Ltd. (HLF) 2025 Form 10-K (weight management ~54.5% of sales). https://ir.herbalife.com/sec-filings
18. Marketdata Enterprises / GlobeNewswire, U.S. Weight Loss Market 2025–2026: GLP-1 boom, ~$135B diet market, legacy commercial programs est. −29% (2023) / −24% (2024); S&P Global / Axios on Novo Nordisk (Wegovy/Ozempic) and Eli Lilly (Zepbound/Mounjaro). https://www.globenewswire.com/news-release/2026/03/10/3253070/28124/en/
19. Fierce Healthcare / SEC, Hims & Hers (HIMS) and LifeMD (LFMD) — telehealth weight-loss lines; compounding-regulation exposure. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001773751
20. U.S. SEC, OneSpaWorld Holdings (OSW) and XWELL, Inc. (XWEL) 2025 Form 10-K (cruise/resort and airport spas). https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001758488
21. Great Clips / Sport Clips / Sola Salon Studios (Radiance Holdings) / Regal Nails / Hair Cuttery — company and franchise disclosures (salon-suite category; PE backing), 2025–2026. https://www.solafranchising.com/about-us/our-story/
22. U.S. SEC, European Wax Center 8-K — take-private by General Atlantic (closed 2026); CT Acquisitions / Physician Growth Partners, Med Spa & Aesthetics M&A Trends (90%+ independent; ~3–4% PE-owned; 50+ deals/yr; Massage Envy, Hand & Stone, Palm Beach Tan, Milan Laser, LaserAway, Ideal Image). https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001856236
23. CNN Business, "Why the Fed cares about the cost of your haircut" (haircut inflation, services CPI, downturn trade-down); MaximizeMarketResearch, Nail Salon Market (pricing, trends). 2024–2025. https://www.cnn.com/2024/03/10/economy/stocks-week-ahead-fed-services-inflation-haircut-doctors-visit/index.html
24. Centers for Disease Control and Prevention, "Obesity and Severe Obesity Prevalence in Adults: United States, August 2021–August 2023" (adult obesity 40.3%), 2024. https://www.cdc.gov/nchs/products/databriefs/db508.htm
25. U.S. Federal Trade Commission, Franchise Rule (Franchise Disclosure Document; 23 items; 14-day rule). https://www.ftc.gov/legal-library/browse/rules/franchise-rule
26. U.S. Federal Trade Commission, Health Products Compliance Guidance (deceptive weight-loss claims; substantiation) and negative-option / auto-renewal enforcement. https://www.ftc.gov/business-guidance/resources/health-products-compliance-guidance
27. U.S. Occupational Safety and Health Administration, Bloodborne Pathogens Standard (29 CFR 1910.1030; tattoo/piercing/shaves) and Health Hazards in Nail Salons / hair-smoothing formaldehyde; U.S. FDA, Modernization of Cosmetics Regulation Act of 2022 (MoCRA). https://www.osha.gov/nail-salons/chemical-hazards
28. U.S. Food and Drug Administration / Congress.gov, Sunlamp products (21 CFR 1040.20); indoor-tanning minor bans (44 states + D.C.); 10% federal tanning excise tax; GLP-1 compounding policy; dietary-supplement oversight. https://www.fda.gov/radiation-emitting-products/home-business-and-entertainment-products/sunlamps-and-sunlamp-products-tanning-bedsbooths

Note: child-industry figures in Sections 2–3 (81211 CR4 1.7% / HHI 1.1; 81219 CR4 11.3%, HHI suppressed) are drawn from the two child primers' 2022 Economic Census concentration tables and are shown only to contrast the children against the level totals in source [3]. The level's own HHI (5.3) and CR ratios are published federal values; no suppressed value is stated.