Ingredient review

3-Benzylidene Camphor

INCI: 3-BENZYLIDENE CAMPHOR

A synthetic UV filter that is effective but controversial due to potential endocrine concerns and regulatory restrictions.

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In plain English

3-Benzylidene Camphor is a man-made ingredient added to sunscreens to help protect your skin from the sun's UV rays. It works by absorbing UV light and turning it into less harmful heat. However, it has raised some safety questions, especially about possible hormone disruption, and is not approved for use in the United States or Japan. It is still found in some sunscreens in other parts of the world, but at low levels.

Quick decision guide

Useful, but context matters

3-Benzylidene Camphor can be useful, but watch for some irritation potential.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging 3-Benzylidene Camphor.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

moderate

Can bother some users, especially with frequent use, damaged skin, or strong companion ingredients.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A synthetic organic compound derived from camphor, designed to absorb UVB radiation. It belongs to the camphor derivative family of UV filters.

How it works

It absorbs UVB light (280–315 nm) and converts the energy into heat, which is then released from the skin, reducing the amount of UV radiation that penetrates the skin.

Pros

Effective UVB filter

Absorbs UVB rays efficiently, helping to prevent sunburn when used in appropriate formulations.

Photostable

Generally stable under sunlight, meaning it doesn't break down quickly and maintains protection longer than some other filters.

Cons and cautions

Regulatory restrictions

Banned or restricted in several countries, including the US and Japan, due to safety concerns. This limits its availability and consumer choice.

Potential endocrine effects

Animal studies suggest it may mimic or interfere with hormones, raising concerns about long-term safety, though human data is limited.

Best for

  • People looking for UVB protection in regions where it is approved
  • Those who tolerate synthetic filters well

Use caution if

  • Pregnant or nursing individuals (due to endocrine concerns)
  • People with sensitive or reactive skin
  • Anyone seeking a mineral-only sunscreen

Usage tips

If you use a sunscreen with this ingredient, apply it generously and reapply every two hours or after swimming or sweating.
Pair with a broad-spectrum sunscreen that also protects against UVA rays for more complete sun protection.

Safety summary

3-Benzylidene Camphor is considered safe at low concentrations by some regulatory bodies, but its use is controversial due to potential endocrine-disrupting effects seen in animal studies. It is not approved in the US or Japan, and individuals with hormone-sensitive conditions may prefer to avoid it.

Research notes

Research indicates effective UVB absorption, but animal studies have raised concerns about estrogenic activity. Human studies are limited, and more research is needed to fully understand long-term safety.

Common label clues

Typical concentration
Up to 2% in some regions, but use is restricted
Regulatory status
Approved in the EU at up to 2% in sunscreen products, but not approved by the FDA in the US or by Japanese regulators. Always check local regulations.
Common uses
Sunscreens, SPF products
Environmental note
Some studies suggest camphor derivatives may accumulate in aquatic environments, though data on 3-Benzylidene Camphor specifically is limited.

Good to know

  • 3-Benzylidene Camphor is not the same as regular camphor used in balms for muscle aches.
  • It is often listed under the INCI name '3-BENZYLIDENE CAMPHOR' on ingredient labels.

Common questions

What is 3-Benzylidene Camphor in beauty products?

3-Benzylidene Camphor is a man-made ingredient added to sunscreens to help protect your skin from the sun's UV rays. It works by absorbing UV light and turning it into less harmful heat. However, it has raised some safety questions, especially about possible hormone disruption, and is not approved for use in the United States or Japan. It is still found in some sunscreens in other parts of the world, but at low levels.

What does 3-Benzylidene Camphor do in a beauty product?

It absorbs UVB light (280–315 nm) and converts the energy into heat, which is then released from the skin, reducing the amount of UV radiation that penetrates the skin.

Is 3-Benzylidene Camphor safe for most people?

3-Benzylidene Camphor is considered safe at low concentrations by some regulatory bodies, but its use is controversial due to potential endocrine-disrupting effects seen in animal studies. It is not approved in the US or Japan, and individuals with hormone-sensitive conditions may prefer to avoid it.

Who should be careful with 3-Benzylidene Camphor?

Pregnant or nursing individuals (due to endocrine concerns) People with sensitive or reactive skin Anyone seeking a mineral-only sunscreen

Research sources

European Chemicals Agency (ECHA) - 3-Benzylidene CamphorOpenPubMed - Safety assessment of camphor derivativesOpenFDA - Sunscreen ingredient statusOpen

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.