Ingredient review
Methyl Benzylidene Camphor
INCI: METHYL2-PHENYLMETHYLENEOCTYLIDENEAMINO BENZOATE
A synthetic UVB filter that protects skin from sunburn, but its use is restricted in some countries due to safety concerns.
In plain English
This is a man-made ingredient added to sunscreens to help block the sun's UVB rays, which cause sunburn. It works by absorbing the UV energy and turning it into a small amount of heat, which is then released from the skin. It's not a moisturizer or a treatment ingredient—it's purely for sun protection. Some countries have limited its use because of potential effects on hormones, though it's still allowed in many places at low levels.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- synthetic
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Methyl Benzylidene Camphor 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 Methyl Benzylidene Camphor.
- 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
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A synthetic organic compound that absorbs UVB light (280–315 nm). It is a camphor derivative, chemically engineered to be stable in sunlight and effective at preventing sunburn.
How it works
When applied to the skin, this ingredient forms a thin film that absorbs UVB photons. The absorbed energy is converted into heat, which dissipates harmlessly. This prevents the UV radiation from penetrating deeper into the skin and causing DNA damage or sunburn.
Pros
Effective UVB blocker
Absorbs UVB rays efficiently, reducing the risk of sunburn and short-term skin damage.
Good photostability
Does not break down quickly in sunlight, so it maintains protection longer than some other filters.
Cons and cautions
Regulatory restrictions
Banned or restricted in the US and Japan due to potential endocrine effects; not available in many popular sunscreens.
Limited UVA protection
Only blocks UVB rays, so it must be paired with other filters for broad-spectrum protection.
Best for
- People looking for high-SPF sunscreens
- Those who tolerate synthetic UV filters well
Use caution if
- Pregnant or nursing individuals (due to hormone concerns)
- Those with sensitive or reactive skin
Usage tips
Safety summary
Generally considered safe at low concentrations for most people, but animal studies have raised concerns about hormone disruption. Regulatory status varies by country, so it's best to choose sunscreens with filters approved in your region.
Research notes
Evidence shows effective UVB absorption, but endocrine activity has been observed in lab and animal studies. Human data is limited, leading to precautionary restrictions in some markets.
Common label clues
- Typical concentration
- Up to 4% in some regions, but varies by regulation
- Regulatory status
- Approved in the EU and some other countries at concentrations up to 4%, but not permitted in the US or Japan. Always check local regulations.
- Common uses
- Sunscreens, SPF moisturizers, Sun protection products
- Environmental note
- Some studies suggest this ingredient may accumulate in aquatic environments and affect marine life, though data is still emerging.
Good to know
- This ingredient is also known as 4-Methylbenzylidene Camphor (4-MBC).
- It is not approved by the FDA for use in sunscreens sold in the United States.
Common questions
What is Methyl Benzylidene Camphor in beauty products?
This is a man-made ingredient added to sunscreens to help block the sun's UVB rays, which cause sunburn. It works by absorbing the UV energy and turning it into a small amount of heat, which is then released from the skin. It's not a moisturizer or a treatment ingredient—it's purely for sun protection. Some countries have limited its use because of potential effects on hormones, though it's still allowed in many places at low levels.
What does Methyl Benzylidene Camphor do in a beauty product?
When applied to the skin, this ingredient forms a thin film that absorbs UVB photons. The absorbed energy is converted into heat, which dissipates harmlessly. This prevents the UV radiation from penetrating deeper into the skin and causing DNA damage or sunburn.
Is Methyl Benzylidene Camphor safe for most people?
Generally considered safe at low concentrations for most people, but animal studies have raised concerns about hormone disruption. Regulatory status varies by country, so it's best to choose sunscreens with filters approved in your region.
Who should be careful with Methyl Benzylidene Camphor?
Pregnant or nursing individuals (due to hormone concerns) Those with sensitive or reactive skin
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.