Ingredient
Resorcinol
Resorcinol 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.
- 1,3-Benzenediol
- m-Dihydroxybenzene
- Resorcin
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
- 4 of 5
- Higher means more likely to sting or redden
Resorcinol and pregnancy
Not Recommended
- Endocrine disruptor
- Absorbed into the body
- Fetal development
Resorcinol is a phenolic compound used in cosmetics for its antimicrobial, antioxidant, and keratolytic properties. It's found in hair dyes, acne treatments, and anti-aging products. Unlike many topical cosmetic ingredients, resorcinol can be absorbed systemically through the skin, particularly when used over large areas or on compromised skin barriers. Multiple studies have raised concerns about resorcinol's effects during pregnancy. Research published in toxicology journals has demonstrated that resorcinol can disrupt thyroid function, with animal studies showing decreased thyroid hormone levels and thyroid gland changes at relevant exposure levels. The developing fetus is particularly vulnerable to thyroid hormone disruption, which is critical for brain development, especially in the first trimester. The European Chemicals Agency (ECHA) has classified resorcinol as a substance of concern regarding reproductive toxicity. Studies have also found associations between occupational exposure to resorcinol in hair dressers and adverse pregnancy outcomes. ACOG recommends that pregnant women minimize exposure to endocrine-disrupting chemicals, and many obstetricians specifically advise avoiding resorcinol-containing products during pregnancy. The EU's Scientific Committee on Consumer Safety has acknowledged concerns about systemic exposure and has restricted resorcinol concentrations in cosmetics. Given the documented thyroid effects and systemic absorption potential, avoiding resorcinol during pregnancy is strongly recommended by medical professionals.
Resorcinol and breastfeeding
Not Recommended
- Passes into breast milk
- Infant exposure
Resorcinol is a phenolic compound that can be absorbed systemically through the skin. Once in the bloodstream, compounds can potentially transfer into breast milk, particularly when they have certain chemical properties like resorcinol's relatively low molecular weight and moderate lipophilicity. The primary concern with resorcinol during breastfeeding relates to its documented thyroid-disrupting effects and potential transfer to the breastfed infant. Thyroid function is critical for infant development, particularly brain development in the first months of life. Studies have shown that resorcinol can interfere with thyroid hormone synthesis and function. While specific data on resorcinol levels in breast milk is limited, the compound's properties suggest it could transfer to milk following systemic absorption. Additionally, the ingredient's potential for skin irritation is concerning if products were applied near breast areas. Most dermatologists and lactation consultants recommend avoiding resorcinol-containing products during breastfeeding due to the theoretical but concerning risk of infant thyroid exposure. The AAD generally advises breastfeeding mothers to be cautious with ingredients that have systemic absorption and endocrine effects. Given the availability of safer alternatives for treating skin concerns, avoiding resorcinol during the breastfeeding period is the prudent choice.
Resorcinol and postpartum
Caution Advised
- Endocrine disruptor
- Irritant
Resorcinol provides keratolytic and antimicrobial benefits in skincare formulations. For postpartum women not breastfeeding, the primary concerns relate to thyroid effects and skin irritation rather than infant exposure. While the immediate risks are lower without breastfeeding concerns, resorcinol's endocrine-disrupting properties remain relevant. Postpartum women are already at increased risk for thyroid dysfunction (postpartum thyroiditis affects 5-10% of women), and using products with thyroid-disrupting potential may not be advisable. Additionally, postpartum skin can be more sensitive due to hormonal fluctuations, making the irritation risk higher. Women planning future pregnancies should also consider that resorcinol could affect thyroid function before conception. Given these factors and the availability of alternatives, many dermatologists suggest choosing products without resorcinol during the postpartum period.
Resorcinol and trying to conceive
Not Recommended
- Hormone disruptor
- Fertility effects
Resorcinol is an endocrine-disrupting compound with documented effects on thyroid function. For women trying to conceive, thyroid health is particularly important as thyroid hormones play crucial roles in ovulation, conception, and early pregnancy. Studies have shown that even subclinical thyroid dysfunction can affect fertility and increase miscarriage risk. Resorcinol's ability to interfere with thyroid function makes it concerning during the preconception period. Additionally, since many women don't know they're pregnant in the first few weeks after conception, using resorcinol while trying to conceive could result in exposure during the critical early weeks of fetal development when the baby is most vulnerable to thyroid disruption. Reproductive endocrinologists typically recommend optimizing thyroid function before conception and minimizing exposures to thyroid-disrupting chemicals. Given that resorcinol can be absorbed systemically through the skin, avoiding it when trying to conceive is advisable.
Resorcinol and PCOS
Not Recommended
- Endocrine disruptor
- Interferes with hormones
Resorcinol has antimicrobial and keratolytic properties that can help treat acne, which is beneficial for many women with PCOS. However, it also has documented endocrine-disrupting effects, particularly on thyroid function. Women with PCOS already have complex hormonal imbalances involving reproductive hormones, insulin, and often thyroid function. Research shows that PCOS patients have higher rates of thyroid dysfunction, with studies finding thyroid disorders in 15-30% of women with PCOS compared to the general population. Using ingredients that further disrupt endocrine function is concerning in this population. Resorcinol's thyroid effects could potentially worsen existing hormonal imbalances or interfere with thyroid medication if prescribed. Most endocrinologists treating PCOS recommend that patients minimize exposure to endocrine-disrupting chemicals when possible, especially given the hormonal complexity of the condition. While resorcinol's acne-fighting properties might seem beneficial for PCOS-related acne, safer alternatives like azelaic acid or niacinamide provide similar benefits without endocrine concerns. Women with PCOS should choose products that avoid potential hormone disruptors.
Resorcinol and general use
Caution Advised
- Irritant
- Endocrine disruptor
- Common allergen
Resorcinol is a phenolic compound used in cosmetics for its antimicrobial, antioxidant, and keratolytic properties. It's found in hair dyes, acne treatments, and anti-aging products where it helps break down rough skin and combat bacteria. However, it's one of the more controversial cosmetic ingredients due to safety concerns. The primary concerns with resorcinol include significant skin irritation potential, allergic sensitization, and endocrine disruption. It can cause redness, burning, and peeling, particularly at higher concentrations. The ingredient is a known skin sensitizer, meaning repeated exposure can lead to allergic reactions. More concerning are studies showing thyroid-disrupting effects. Research published in toxicology journals has demonstrated that resorcinol interferes with thyroid hormone synthesis and can decrease thyroid hormone levels. Animal studies have shown thyroid gland changes at exposure levels that may be relevant to human use. While a single use is unlikely to cause thyroid problems, regular or prolonged use could contribute to cumulative exposure concerns. The EU Scientific Committee on Consumer Safety has reviewed resorcinol and restricted its use due to safety concerns. It's limited to 0.5% in hair lotions and shampoos, and 5% in hair dyes with mandatory warnings. It's prohibited in aerosol products. Some toxicologists and advocacy groups recommend avoiding resorcinol entirely, particularly for individuals with thyroid conditions or those concerned about endocrine disruptors. Safer alternatives are available for most cosmetic applications where resorcinol is used. People choosing to use products with resorcinol should limit application to small areas and avoid prolonged use.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of Resorcinol, 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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