Ingredient review
Hydrolyzed Ulva Pertusa Extract
INCI: Hydrolyzed Ulva Pertusa Extract
A gentle, hydrating seaweed extract that helps soothe and moisturize skin, with promising antioxidant potential.
In plain English
This is a processed extract from a type of green seaweed called sea lettuce. The 'hydrolyzed' part means it's been broken down into smaller pieces so your skin can absorb it more easily. It's used in skincare to add moisture and calm irritation, similar to how aloe vera works but from the sea.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- natural
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Hydrolyzed Ulva Pertusa Extract is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Hydrolyzed Ulva Pertusa Extract.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A water-soluble extract derived from the green seaweed Ulva pertusa (sea lettuce) that has been hydrolyzed to break down its polysaccharides into smaller, more skin-absorbable molecules.
How it works
It forms a thin, moisturizing film on the skin's surface, helping to reduce water loss (transepidermal water loss, or TEWL). Its polysaccharides also have a mild soothing effect, which can help calm redness and irritation.
Pros
Gentle hydration
Forms a light, non-greasy film that helps keep moisture in the skin without clogging pores.
Soothing potential
May help calm redness and irritation, making it a good option for sensitive skin routines.
Cons and cautions
Limited research
Most evidence comes from lab studies; there aren't many human trials confirming its benefits in skincare.
Mild effects
Compared to proven humectants like glycerin or hyaluronic acid, its hydrating power may be more subtle.
Best for
- People with dry or dehydrated skin
- Those with sensitive or easily irritated skin
Use caution if
- Individuals with known seaweed allergies (rare)
Usage tips
Safety summary
Hydrolyzed Ulva pertusa extract is considered safe for topical use with a low risk of irritation or allergic reaction. As with any new ingredient, a patch test is recommended for those with very sensitive skin or known seaweed allergies.
Research notes
Research is primarily in vitro (lab-based), showing antioxidant and moisturizing properties. Human studies are limited, so while the ingredient is promising, its benefits are not as well-established as some other humectants.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Generally considered safe for use in cosmetics at typical concentrations. No specific restrictions in the US or EU.
- Common uses
- Serums, Moisturizers, Sheet masks, Soothing creams
- Environmental note
- Ulva pertusa is a fast-growing seaweed that can be sustainably harvested or cultivated, making it a relatively eco-friendly ingredient.
Good to know
- This ingredient is often found in 'seaweed' or 'marine' skincare lines.
- The hydrolysis process makes it more soluble and easier for the skin to use.
Common questions
What is Hydrolyzed Ulva Pertusa Extract in beauty products?
This is a processed extract from a type of green seaweed called sea lettuce. The 'hydrolyzed' part means it's been broken down into smaller pieces so your skin can absorb it more easily. It's used in skincare to add moisture and calm irritation, similar to how aloe vera works but from the sea.
What does Hydrolyzed Ulva Pertusa Extract do in a beauty product?
It forms a thin, moisturizing film on the skin's surface, helping to reduce water loss (transepidermal water loss, or TEWL). Its polysaccharides also have a mild soothing effect, which can help calm redness and irritation.
Is Hydrolyzed Ulva Pertusa Extract safe for most people?
Hydrolyzed Ulva pertusa extract is considered safe for topical use with a low risk of irritation or allergic reaction. As with any new ingredient, a patch test is recommended for those with very sensitive skin or known seaweed allergies.
Who should be careful with Hydrolyzed Ulva Pertusa Extract?
Individuals with known seaweed allergies (rare)
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.