Ingredient review
Cyathusal B
INCI: Cyathusal B
Cyathusal B is an emerging fungal-derived antioxidant with early research suggesting anti-inflammatory benefits, but human studies are lacking.
In plain English
Cyathusal B is a compound found in a type of fungus called Cyathus. In lab studies, it shows promise as an antioxidant and anti-inflammatory ingredient, meaning it might help protect skin from damage and calm irritation. However, it's very new to cosmetics, so there isn't much research on how well it works on human skin yet.
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
Cyathusal B 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 Cyathusal B.
- 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
Cyathusal B is a naturally occurring diterpenoid isolated from fungi of the Cyathus genus, known for producing bioactive compounds with antioxidant and anti-inflammatory potential.
How it works
In cosmetic products, Cyathusal B is thought to work by neutralizing free radicals (unstable molecules that can damage skin cells) and by reducing the production of inflammatory signals in skin cells, potentially helping to calm redness and support skin repair.
Pros
Promising antioxidant activity
Early lab studies show Cyathusal B can neutralize free radicals, which may help prevent premature skin aging from environmental stressors like pollution and UV exposure.
Potential anti-inflammatory effects
Research indicates it may reduce inflammatory markers in skin cells, offering a soothing benefit for mild redness or irritation.
Cons and cautions
Lack of human studies
Most evidence comes from lab or animal studies; there are no published clinical trials on human skin, so real-world efficacy and safety are not well understood.
Rarity and cost
Cyathusal B is sourced from a specific fungus and is not widely available, which may make it expensive and limit its use in affordable products.
Best for
- People interested in cutting-edge, fungal-derived ingredients
- Those with normal to combination skin looking for antioxidant support
Use caution if
- Anyone with known allergies to fungal-derived ingredients
- Those seeking well-established, thoroughly researched ingredients
Usage tips
Safety summary
Cyathusal B appears to have low irritation and comedogenic risk based on limited data, but comprehensive safety assessments are lacking due to its novelty.
Research notes
Current evidence is limited to in vitro (lab) studies showing antioxidant and anti-inflammatory activity. No human clinical trials are available, so efficacy remains theoretical.
Common label clues
- Typical concentration
- Typically used at very low concentrations (0.001%–0.1%) due to potency and limited solubility.
- Regulatory status
- Cyathusal B is not specifically regulated by the FDA as a cosmetic ingredient, but it must meet general safety requirements for cosmetics sold in the U.S. and EU.
- Common uses
- Anti-aging serums, Soothing creams
- Environmental note
- Sourcing from wild fungi may raise sustainability concerns; cultivated sources are preferable to reduce environmental impact.
Good to know
- Cyathusal B is often listed under its INCI name on labels; look for it in serums or treatments targeting aging or inflammation.
- Because it's a novel ingredient, patch testing is recommended before regular use.
Common questions
What is Cyathusal B in beauty products?
Cyathusal B is a compound found in a type of fungus called Cyathus. In lab studies, it shows promise as an antioxidant and anti-inflammatory ingredient, meaning it might help protect skin from damage and calm irritation. However, it's very new to cosmetics, so there isn't much research on how well it works on human skin yet.
What does Cyathusal B do in a beauty product?
In cosmetic products, Cyathusal B is thought to work by neutralizing free radicals (unstable molecules that can damage skin cells) and by reducing the production of inflammatory signals in skin cells, potentially helping to calm redness and support skin repair.
Is Cyathusal B safe for most people?
Cyathusal B appears to have low irritation and comedogenic risk based on limited data, but comprehensive safety assessments are lacking due to its novelty.
Who should be careful with Cyathusal B?
Anyone with known allergies to fungal-derived ingredients Those seeking well-established, thoroughly researched ingredients
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.