2025-12-30 · 4 min read
What are cosmeceuticals?
Where the term came from, why no major regulator recognises it, and what it usefully signals about a product even without legal standing.
Cosmeceutical is a portmanteau of cosmetic and pharmaceutical, describing cosmetic products formulated with bioactive ingredients at concentrations intended to produce a measurable effect rather than only a cosmetic one. The category has grown enormously. It exists in the market rather than in law.
History and regulatory status
The term was coined in the 1960s by Raymond Reed, a founding member of the US Society of Cosmetic Chemists. It was popularised from 1984 by the dermatologist Albert Kligman of the University of Pennsylvania, the researcher behind tretinoin's development for photo-ageing, who wanted a word for products sitting between decorative cosmetics and licensed drugs: measurably active, but not pharmaceuticals.
It described a real phenomenon, and no major regulator has adopted it. The US FDA does not recognise cosmeceuticals as a category, and neither does the EU under Regulation (EC) No 1223/2009. A product is a cosmetic, a drug, or both, and must comply with the framework that applies. Japan's quasi-drug classification is the closest genuine analogue anywhere in the world.
The consequence is practical: products marketed as cosmeceuticals are regulated as ordinary cosmetics, and must meet the same safety-assessment, notification and labelling requirements as anything else on the shelf.
Where the line falls
The cosmetic/drug boundary is drawn by claim and intended use, not by formulation sophistication. Improving appearance is cosmetic. Diagnosing, treating or preventing disease, or altering the structure or function of the body, is a drug claim. A claim made in advertising or on social media counts, not only on the pack.
This is why a moisturiser is a cosmetic and the same formula marketed as treating eczema is a drug, and why sunscreens are OTC drugs in the US but cosmetics in the EU on identical chemistry. See what is a cosmetic active ingredient.
Ingredients
Products in this space typically build on antioxidants (vitamins A, C and E), niacinamide, peptides, retinoids, hydroxy acids, UV filters, and botanical extracts such as green tea. Beyond the actives, they use the same functional ingredients as any cosmetic: emulsifiers, humectants, thickeners, preservatives and colourants including iron oxides.
What distinguishes them, where the label means anything, is concentration and formulation quality: an active at a level supported by published work, in a base that keeps it stable and delivers it. That is a real difference, and it is invisible from an ingredient list alone.
How far into skin do they act?
Worth being precise, because loose claims here are how a cosmetic acquires a regulatory problem.
Cosmetics act on the stratum corneum and the skin surface. Some actives do reach the viable epidermis: retinoids and niacinamide are absorbed and act on living cells. But a product intended to act on the dermis to treat a condition has, by that intention, made a drug claim.
Two corrections to a description that circulates widely. The dermis is not "the second layer of the epidermis"; it lies beneath the epidermis and is a separate compartment with its own structure. And demonstrating that an active reaches the dermis is not a selling point for a cosmetic; it is an argument that the product should have been developed as a drug.
Usage
These products are sold without prescription and are broadly suitable, but selection should follow skin condition. Anyone with cystic acne, rosacea, eczema or another chronic condition should take advice before adding potent actives, since irritation can worsen the underlying problem. The category extends beyond skincare into hair, lip, nail and colour products.
Cosmeceutical is a marketing term
Cosmeceutical is a marketing term rather than a regulatory one, and it is not "dermatological medicine"; treating it as such misstates both what these products are permitted to claim and what they are tested against. It does carry useful information: it usually signals higher active concentrations, some clinical testing, and evidence-led formulation.
The right questions are the same as for any cosmetic. Which active, at what concentration, with what evidence, in a formulation that keeps it stable? Those are answerable. The label on the category is not.
Frequently asked
Is "cosmeceutical" a legal category?
No. The US FDA does not recognise it, and neither does the EU under Regulation (EC) No 1223/2009. A product is a cosmetic, a drug, or both, and it must comply with the framework for whichever applies. Japan's quasi-drug category is the nearest genuine equivalent anywhere.
What is the difference between a cosmetic and a drug?
The claim and the intended use. Improving appearance is cosmetic; diagnosing, treating or preventing disease, or altering the structure or function of the body, is a drug claim. The same formula can fall either side depending on how it is marketed.
Do cosmeceuticals work on the dermis?
Products marketed that way generally act on the stratum corneum and epidermis. Some actives do reach the viable epidermis, but a product intended to act on the dermis to treat a condition has made a drug claim, whatever it is called on the packaging.