Encapsulated retinol 0.3%: why this is the maximum SCCS 2023 threshold — and why it matters

The Scientific Committee on Consumer Safety (SCCS) is the European Commission's advisory body responsible for evaluating the safety of cosmetic ingredients. In 2022-2023, it issued an opinion on the use of retinol (vitamin A alcohol) in cosmetics, reducing the permitted limit in leave-on body care products to 0.3% (Opinion SCCS/1602/19, revised 2023). This regulatory reduction is motivated by concerns about chronic toxicity at high doses. It also means that 0.3% is both the maximum legal concentration AND the most effective concentration permitted.

Retinol is an extremely unstable molecule: sensitive to light, oxygen, and pH. Non-encapsulated retinol in a standard bottle oxidises within weeks, losing up to 60% of its activity before the end of the bottle. Encapsulation in polymer microspheres (technology used by LYMPHEA™) simultaneously solves three problems: chemical stability (oxidation protection), controlled release kinetics (progressive penetration over 4-6 hours vs. immediate release), and improved skin tolerance (encapsulated retinol irritates less than free retinol at equivalent concentration).

LYMPHEA™ uses an opaque bag-in-bottle (BiB) container: the product is contained in a hermetically sealed internal pouch, separated from the outer bottle. This system prevents contact with air at each use — unlike standard pump bottles where 0.5 to 1 ml of air enters with each press. Maintaining pH at 5.4 is also significant: retinol is maximally active between pH 5 and 5.5, and human keratinocytes express more RAR (Retinoic Acid Receptor) receptors at this pH. "My dermatologist told me that effective-dose body retinol was reserved for doctors. When I showed her LYMPHEA™'s technical data sheet, she looked at it for a long time and said: 'Now, they've done the work.'" — Élodie M., general practitioner, Nantes.