Cosmetic vs Drug vs Soap — FDA Classification
How the FDA defines these three categories and why the label on your product matters
Under US federal law, "soap," "cosmetic," and "drug" are three distinct legal categories with different regulatory requirements. The category your product falls into is determined primarily by its intended use — which is communicated through your claims, labeling, and marketing, not just the ingredients. Getting this wrong can mean selling an unapproved drug without realizing it.
The three categories
| Category | Legal definition | Regulated by | Pre-market approval? |
|---|---|---|---|
| True soap | Made from alkali + fats; intended for cleansing only; no cosmetic claims | CPSC (Consumer Product Safety Commission) | No |
| Cosmetic | Intended to be applied to the body to cleanse, beautify, promote attractiveness, or alter appearance, without affecting body structure/function | FDA | No — but must meet safety, labeling, and GMP requirements |
| Drug (OTC) | Intended to diagnose, cure, mitigate, treat, or prevent disease; or to affect body structure/function | FDA | Yes — must comply with OTC monograph or obtain NDA/ANDA |
What makes something 'true soap'?
The FDA's definition of true soap requires three things simultaneously:
- The bulk of the non-volatile matter consists of alkali salts of fatty acids (saponified oils).
- The product's detergent action comes only from those alkali fatty acid salts.
- The product is labeled and marketed only as soap — no cosmetic claims.
Most handmade soap is NOT true soap under the FDA definition
Cosmetics — what is allowed and what isn't
A cosmetic product does not need FDA pre-market approval, but it must:
- Be safe for its intended use (manufacturer's responsibility to substantiate)
- Bear proper labeling under 21 CFR Parts 701 and 740 (INCI list, net weight, manufacturer info, warnings)
- Meet Good Manufacturing Practice standards
- Be registered with the FDA if manufactured in the US (MoCRA requirement, phased in)
- Not use prohibited color additives or prohibited ingredients
Cosmetic claims that are safe
Drug claims — the line you cannot cross
These claims make your product an unapproved drug
Some OTC drug categories have established monographs — pre-approved frameworks that allow products to make specific claims without full drug approval, provided they meet the monograph's ingredient, labeling, and testing requirements. Sunscreen (M020), antiperspirant, and dandruff shampoo are examples. Small makers rarely meet monograph requirements.
Products that are both cosmetic and drug
Some products are legally both — if they make both cosmetic and drug claims, or if the ingredient itself is a recognized drug active:
| Product | Why it's both |
|---|---|
| Sunscreen lotion | SPF claim = drug claim; lotion = cosmetic function |
| Anti-dandruff shampoo | Dandruff treatment = drug; shampoo = cosmetic |
| Fluoride toothpaste | Cavity prevention = drug; toothpaste = cosmetic |
| Antiperspirant deodorant | Antiperspirant = drug (reduces sweating); deodorant alone = cosmetic |
| Acne face wash | Treats acne = drug claim |
For each of these, the FDA has an OTC monograph that specifies what active ingredients, concentrations, and label claims are permitted. Small makers cannot make these products outside the monograph framework.