Phaeodactylum Tricornutum Extract
A diatom microalgae extract. The maker links it to UV protection and brightening; independent data are limited. Well tolerated.
Evidence by route
Topical application
A marine active. Well tolerated; independent data limited.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Extract of the diatom Phaeodactylum tricornutum (INCI: Phaeodactylum Tricornutum Extract) comes from a marine microalga. In cosmetics it is presented as an ingredient with supporting photoprotective action and some brightening effect. A caveat is needed: the manufacturer links this extract to protection from UV radiation and an effect on dark spots, but independent human-skin data are scarce. It is a supporting ingredient with limited evidence, not a sunscreen filter or a proven brightener. It does not replace a sunscreen. Topically it has no systemic relevance, so it can be used during pregnancy and breastfeeding. Good tolerance: low risk of irritation and allergy, suitable for sensitive skin.
Frequently asked questions
Is Phaeodactylum Tricornutum Extract safe during pregnancy?
Phaeodactylum Tricornutum Extract is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Phaeodactylum Tricornutum Extract for?
Phaeodactylum Tricornutum Extract suits: normal, dry, combination, oily, sensitive.
What is Phaeodactylum Tricornutum Extract and what does it do in cosmetics?
A diatom microalgae extract.
What's the INCI name for Phaeodactylum Tricornutum Extract?
The INCI name is Phaeodactylum Tricornutum Extract.
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