Ingredient review
Mycosporine Glycine
INCI: Mycosporine Glycine
A promising natural UV filter and antioxidant from marine sources, but still emerging in human skincare research.
In plain English
Mycosporine glycine is a natural compound made by algae and other sea creatures to protect themselves from the sun. When put on your skin, it can absorb UV light and help neutralize free radicals, acting like a gentle, natural sunscreen booster and antioxidant. Think of it as a tiny marine umbrella that also mops up skin-damaging molecules.
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
Mycosporine Glycine 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 Mycosporine Glycine.
- 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
Mycosporine glycine is a type of mycosporine-like amino acid (MAA), a small molecule produced by cyanobacteria, algae, and marine animals to defend against UV radiation. It is extracted and purified for use in cosmetic products.
How it works
It absorbs UV radiation (especially UVA and some UVB) and converts it into harmless heat, reducing the amount of UV energy that reaches skin cells. Additionally, it acts as an antioxidant, scavenging free radicals generated by UV exposure and environmental stressors.
Pros
Natural UV absorber
Derived from marine organisms, it offers a renewable, eco-friendly alternative to some synthetic UV filters.
Dual antioxidant action
Not only absorbs UV but also neutralizes free radicals, helping to reduce oxidative skin damage.
Cons and cautions
Limited human evidence
Most studies are lab-based or on marine biology; robust human trials for anti-aging or sun protection are still scarce.
Formulation challenges
It can be unstable in certain formulas and may require special encapsulation or stabilizers, which can increase product cost.
Best for
- People seeking natural or marine-derived UV protection in their skincare.
- Those with sensitive skin looking for a gentle antioxidant and UV booster.
Use caution if
- Anyone relying solely on this ingredient for sun protection without a proper broad-spectrum sunscreen.
Usage tips
Safety summary
Generally recognized as safe for topical use based on limited data; low irritation and comedogenic risk. However, long-term human safety studies are lacking.
Research notes
Evidence is primarily from in vitro and marine biology studies showing UV absorption and antioxidant activity. Human clinical data is emerging but not yet robust.
Common label clues
- Typical concentration
- 0.1% to 2%
- Regulatory status
- Not currently approved as a standalone UV filter by the FDA or EU CosIng; used as a cosmetic ingredient for antioxidant and skin-conditioning purposes.
- Common uses
- Sunscreens, Anti-aging serums, Day creams
- Environmental note
- Sourced from marine organisms, it is considered more biodegradable and reef-safe than some synthetic UV filters, but sustainability of harvesting is a consideration.
Good to know
- Mycosporine glycine is part of a family of mycosporine-like amino acids (MAAs) found in corals, algae, and cyanobacteria.
- It is often marketed as a 'natural sunscreen' but is not approved as a primary UV filter in many countries; check local regulations.
Common questions
What is Mycosporine Glycine in beauty products?
Mycosporine glycine is a natural compound made by algae and other sea creatures to protect themselves from the sun. When put on your skin, it can absorb UV light and help neutralize free radicals, acting like a gentle, natural sunscreen booster and antioxidant. Think of it as a tiny marine umbrella that also mops up skin-damaging molecules.
What does Mycosporine Glycine do in a beauty product?
It absorbs UV radiation (especially UVA and some UVB) and converts it into harmless heat, reducing the amount of UV energy that reaches skin cells. Additionally, it acts as an antioxidant, scavenging free radicals generated by UV exposure and environmental stressors.
Is Mycosporine Glycine safe for most people?
Generally recognized as safe for topical use based on limited data; low irritation and comedogenic risk. However, long-term human safety studies are lacking.
Who should be careful with Mycosporine Glycine?
Anyone relying solely on this ingredient for sun protection without a proper broad-spectrum sunscreen.
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.