Researched by Helena DeMaria-Williams
Formula IngredientHumectant, Skin ConditioningHydrolyzed Rhodophyceae Extract
INCI: Hydrolyzed Rhodophyceae Extract
Hydrolyzed Rhodophyceae Extract is derived from red algae (Rhodophyceae) through acid, enzymatic, or other hydrolysis methods, and is cultivated in photobioreactors for cosmetic use. The hydrolysis process breaks down the algae's complex polysaccharides and proteins into smaller, more bioavailable molecules that can interact effectively with skin. It is rich in minerals, amino acids, and antioxidants that support the skin's natural defensive mechanisms.
Category
Humectant, Skin Conditioning
Irritation Risk
Low
Skin Types
all skin types, dry, mature, sensitive, acne-prone, oily
What does this do in a formula?
hydration, skin softening, firming, antioxidant protection, skin barrier strengthening, soothing, redness reduction, anti-ageing
Is Hydrolyzed Rhodophyceae Extract safe? Key considerations
Can Hydrolyzed Rhodophyceae Extract cause irritation?
Low RiskGenerally well tolerated with a 'no penalty' safety rating across cosmetic safety categories. No EU Annex II or III restrictions apply. Individuals with specific sensitivities to algae-derived ingredients may experience mild reactions; patch testing is recommended. Potential arsenic impurities in algae-derived ingredients are a manufacturing concern — products from reputable manufacturers using good manufacturing practices (GMP) should be selected.
Does Hydrolyzed Rhodophyceae Extract increase sun sensitivity?
No RiskHydrolyzed Rhodophyceae Extract does not increase photosensitivity. No special sun protection measures are required based solely on its presence in a formulation.
Is Hydrolyzed Rhodophyceae Extract safe during pregnancy?
CautionLimited safety data is available specifically for pregnancy. No DART (developmental and reproductive toxicity) studies have been published in the scientific literature. The Cosmetic Ingredient Review (CIR) noted insufficient data to fully determine safety for some algae-derived ingredients. Additionally, potential arsenic impurities in algae ingredients are a concern. Low-concentration topical use is likely low risk, but pregnant individuals should consult a healthcare provider. (Sources: Motherfigure, CIR Safety Assessment of Red Algae-Derived Ingredients)
How does Hydrolyzed Rhodophyceae Extract work?
Hydrolyzed Rhodophyceae Extract is derived from red algae (Rhodophyceae) through acid, enzymatic, or other hydrolysis methods, and is cultivated in photobioreactors for cosmetic use. The hydrolysis process breaks down the algae's complex polysaccharides and proteins into smaller, more bioavailable molecules that can interact effectively with skin. It is rich in minerals, amino acids, and antioxidants that support the skin's natural defensive mechanisms.
Individuals with known allergy to algae or marine-derived ingredients should review the considerations above before use.
Which products contain Hydrolyzed Rhodophyceae Extract?
Shop products that contain Hydrolyzed Rhodophyceae Extract
