Ingredient
4-Methylbenzylidene Camphor
4-Methylbenzylidene Camphor is flagged for pregnancy, breastfeeding, trying to conceive, PCOS, postpartum and general use. The concern behind the strongest flag is endocrine disruptor and absorbed into the body.
- 4-MBC
- Enzacamene
- Parsol 5000
Verdict by profile
Truva checks every ingredient against six profiles. Jump to any of them for the full assessment.
- Strongest verdict
- Not Recommended
- Its verdict for pregnancy, the profile this one is worst in
- Profiles flagged
- 6 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 1 of 5
- Higher means more likely to sting or redden
4-Methylbenzylidene Camphor and pregnancy
Not Recommended
- Endocrine disruptor
- Absorbed into the body
- Fetal development
- Hormone disruptor
4-Methylbenzylidene Camphor (4-MBC) is a chemical sunscreen filter that absorbs UVB rays. While sun protection is important during pregnancy, 4-MBC has raised significant concerns among toxicologists and regulatory bodies due to its hormone-disrupting properties. Multiple European studies have demonstrated that 4-MBC exhibits estrogenic activity and can be absorbed systemically through the skin. According to ECHA, this ingredient has been detected in blood samples and breast milk, confirming that it crosses biological barriers. Animal studies have shown potential effects on reproductive organs and thyroid function. During pregnancy, when hormonal balance is critical for fetal development, exposure to endocrine-disrupting chemicals is particularly concerning, especially during the first trimester when organogenesis occurs. While 4-MBC is approved in the EU, it is NOT approved by the FDA in the United States, and several European regulatory bodies have expressed concerns about its safety profile. Most obstetricians and dermatologists recommend avoiding chemical UV filters with known endocrine-disrupting potential during pregnancy, favoring mineral sunscreens instead.
4-Methylbenzylidene Camphor and breastfeeding
Not Recommended
- Passes into breast milk
- Infant exposure
- Endocrine disruptor
4-MBC is a chemical UV filter that has been detected in human breast milk in multiple studies, confirming that it can transfer from maternal use to the breastfed infant. As a lipophilic (fat-soluble) compound, it accumulates in adipose tissue and can partition into breast milk. According to research published in European toxicology journals, 4-MBC has demonstrated estrogenic activity and potential endocrine-disrupting effects. Infant exposure through breast milk is particularly concerning because newborns have immature detoxification systems and are more vulnerable to hormone disruptors during critical developmental periods. The AAD and most dermatologists recommend avoiding chemical sunscreens with known endocrine activity during breastfeeding. Since 4-MBC is not approved in the United States and faces ongoing scrutiny in Europe, breastfeeding mothers should opt for mineral sunscreens (zinc oxide or titanium dioxide) which do not absorb systemically and pose no risk to breastfed infants.
4-Methylbenzylidene Camphor and postpartum
Caution Advised
- Endocrine disruptor
- Absorbed into the body
For women who are not breastfeeding, the primary concern with 4-MBC is its potential endocrine-disrupting activity. Studies have shown it exhibits estrogenic effects and can be absorbed systemically through skin application. While the immediate risk of infant exposure is eliminated when not breastfeeding, postpartum women are still recovering hormonally and may prefer to avoid ingredients that could interfere with natural hormone regulation. If you choose to use products containing 4-MBC, be aware that it can accumulate in the body over time due to its fat-soluble nature. Many women prefer to transition to mineral sunscreens (zinc oxide or titanium dioxide) or other chemical filters with better safety profiles during the postpartum period.
4-Methylbenzylidene Camphor and trying to conceive
Not Recommended
- Hormone disruptor
- Fertility effects
- Builds up in tissue
Women trying to conceive should avoid 4-MBC due to its demonstrated endocrine-disrupting properties. This chemical UV filter has shown estrogenic activity in studies and can accumulate in body tissues due to its fat-soluble nature. Since it can be detected in blood and persists in the body, exposure during the preconception period could potentially affect early pregnancy before a woman knows she's pregnant. According to reproductive endocrinology research, minimizing exposure to endocrine-disrupting chemicals during the preconception period is recommended to optimize hormonal balance and create the healthiest environment for conception and early embryonic development. Most fertility specialists and dermatologists advise switching to mineral sunscreens (zinc oxide or titanium dioxide) when trying to conceive, as these provide effective sun protection without systemic absorption or hormonal interference.
4-Methylbenzylidene Camphor and PCOS
Not Recommended
- Interferes with hormones
- Affects estrogen
- Mimics androgens
Women with PCOS already experience hormonal imbalances, particularly involving androgens, insulin resistance, and irregular estrogen patterns. 4-MBC has demonstrated estrogenic activity in laboratory studies and can be absorbed systemically through the skin, potentially interfering with the delicate hormonal balance that women with PCOS are working to regulate. According to ECHA and European endocrinology research, 4-MBC acts as an endocrine disruptor and has been shown to affect thyroid and reproductive hormone function in animal studies. For women with PCOS who may be managing their condition through lifestyle, medication, or both, introducing additional hormone-disrupting chemicals can counteract treatment efforts and potentially worsen symptoms. Dermatologists specializing in PCOS typically recommend avoiding chemical UV filters with known endocrine activity. Mineral sunscreens (zinc oxide or titanium dioxide) are preferred alternatives that provide excellent sun protection without hormonal interference, which is especially important for women with PCOS who may also be using sun protection alongside acne treatments like retinoids.
4-Methylbenzylidene Camphor and general use
Caution Advised
- Endocrine disruptor
- Absorbed into the body
4-Methylbenzylidene Camphor (4-MBC) is a chemical UV filter that effectively absorbs UVB radiation. While it is approved in the EU for use in sunscreens, it has not been approved by the FDA in the United States, which reflects ongoing concerns about its safety profile. The primary concern with 4-MBC is its potential as an endocrine disruptor. Multiple European studies have demonstrated that it exhibits estrogenic activity and can be absorbed through the skin into the bloodstream. According to ECHA, it has been detected in human blood and breast milk samples, indicating systemic absorption and bioaccumulation. Animal studies have shown effects on reproductive organs and thyroid function, though human data is still limited. For the general public, regulatory bodies in several European countries have raised concerns about long-term exposure to 4-MBC, particularly for daily use products. Many dermatologists recommend considering alternative UV filters such as zinc oxide, titanium dioxide, or newer chemical filters like Tinosorb S that have better safety profiles. If you choose to use products with 4-MBC, limit application to occasional use rather than daily exposure.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of 4-Methylbenzylidene Camphor, each one with its own page here.
Ingredients that raise the same concerns.
Where this came from
Truva summarises published guidance from bodies including ACOG, the FDA, the EU SCCS and the Cosmetic Ingredient Review. It has no access to your medical history and it is not a substitute for your doctor, dermatologist or midwife. These assessments have not been reviewed by a clinician, and nothing here is a diagnosis or a prescription. If you are pregnant, breastfeeding or being treated for PCOS, take the ingredient list to the person looking after you.
Assessment last pulled from the ingredient database on .
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