Low-molecular-weight protein hydrolysate from yeast – a source of amino acids and peptides. Supports hydration and epidermal regeneration. Pregnancy-safe.
Topical application
BLimited evidence. One RCT or several controlled studies with limitations.
Peptide and amino-acid humectant. Moderate evidence (clinical data for hydration).
Hydrolyzed yeast protein is the product of enzymatic hydrolysis of yeast proteins into short peptides and free amino acids. INCI: Hydrolyzed Yeast Protein. It contains glutamate, proline, alanine, serine and nucleotides. In cosmetics it works as a humectant and regenerative component. Low-mass peptides (<3 kDa) penetrate the stratum corneum, rebuild the NMF and support the barrier. Free amino acids serve as substrate for filaggrin synthesis. Clinical studies show improved skin hydration and elasticity. It is often used in creams for mature skin and post-procedure products. Use levels run from 1 to 5%. Stable in formulas with pH 4-7. Pregnancy safety. Skin absorption into the systemic circulation is minimal. Yeast hydrolysates are a food ingredient with unquestioned safety. Skin profile. Low irritation potential. Low allergen risk, with rare cases in people hypersensitive to yeast. Non-comedogenic. Suitable for all skin types. Active effect at level B – clinical data for hydration; collagen-stimulation data are weaker.
Irritation potential
LowAllergen risk
LowPregnancy
SafeSuitable for
Hydrolyzed Yeast Protein is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
Hydrolyzed Yeast Protein suits: normal, dry, combination, oily, sensitive.
Low-molecular-weight protein hydrolysate from yeast – a source of amino acids and peptides.
On the Fulton scale 0/5 – non-comedogenic. For acne-prone skin, a rating of 3 or higher suggests choosing an alternative.
The INCI name is Hydrolyzed Yeast Protein. It may also appear as: Hydrolyzed Yeast, Гидролизованный белок дрожжей.
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