Ingredient
Homosalate
Homosalate is flagged for pregnancy, breastfeeding, trying to conceive, PCOS and general use. The concern behind the strongest flag is endocrine disruptor and absorbed into the body.
- Homomenthyl salicylate
- HMS
- 3,3,5-Trimethylcyclohexyl salicylate
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
- 5 of 6
- Counting avoid, high risk and medium risk
- Irritancy
- 2 of 5
- Higher means more likely to sting or redden
Homosalate and pregnancy
Not Recommended
- Endocrine disruptor
- Absorbed into the body
- Hormone disruptor
Homosalate is a chemical UV filter used in sunscreens to absorb UVB radiation and protect skin from sun damage. It belongs to the salicylate class of sunscreen ingredients. The primary concern with homosalate during pregnancy is its potential for endocrine disruption and significant systemic absorption. According to FDA studies published in JAMA (2019, 2020), homosalate is absorbed through the skin and reaches blood levels well above the FDA's safety threshold (0.5 ng/mL), with concentrations reaching up to 90 ng/mL. Research indicates that homosalate may have weak hormone-disrupting properties, potentially interfering with estrogen and androgen receptors. While there are no definitive human studies showing harm to pregnancy, the combination of high systemic absorption and endocrine activity raises concerns during fetal development, particularly for the developing reproductive and hormonal systems. The American Academy of Dermatology and many obstetricians recommend that pregnant women prioritize mineral sunscreens (zinc oxide and titanium dioxide) over chemical filters like homosalate. While not explicitly prohibited by ACOG, the precautionary principle suggests avoiding ingredients with endocrine-disrupting potential during pregnancy when safer alternatives exist. Women who prefer maximum caution typically opt for mineral-based sunscreens throughout pregnancy.
Homosalate and breastfeeding
Caution Advised
- Absorbed into the body
- Passes into breast milk
Homosalate is a chemical sunscreen ingredient that absorbs significantly through the skin into the bloodstream. Studies show it reaches blood plasma levels well above safety thresholds for systemic circulation. While specific studies on homosalate transfer to breast milk are limited, the ingredient's demonstrated high systemic absorption raises theoretical concerns for breastfeeding mothers. Given that homosalate is fat-soluble and reaches measurable blood levels, there is potential for transfer into breast milk, which has a high lipid content. The significance of infant exposure is unknown, but some experts recommend caution with chemical UV filters that show high absorption rates. Most dermatologists and pediatricians recommend that breastfeeding mothers prioritize mineral sunscreens (zinc oxide, titanium dioxide) as these remain on the skin surface with minimal absorption. While homosalate is not explicitly prohibited during breastfeeding, the precautionary approach favors alternatives with better safety profiles and lower systemic exposure.
Homosalate and postpartum
Safe to Use
- Endocrine disruptor
Homosalate provides UVB protection and is commonly found in sunscreen products. For postpartum women not breastfeeding, the primary consideration is the ingredient's potential endocrine-disrupting properties rather than transfer concerns. The endocrine activity of homosalate is considered weak and its clinical significance for non-pregnant, non-breastfeeding adults is debated. Sun protection is crucial for preventing skin damage, and homosalate-containing sunscreens remain a valid option. However, women concerned about hormone balance may prefer mineral sunscreens or other chemical filters with less endocrine activity.
Homosalate and trying to conceive
Caution Advised
- Endocrine disruptor
- Hormone disruptor
Homosalate is a chemical sunscreen ingredient with potential endocrine-disrupting properties. Studies indicate it may interact with hormone receptors, though the reproductive significance is unclear. Women trying to conceive who are concerned about optimizing hormonal balance may choose to avoid homosalate and similar chemical UV filters with endocrine activity. While there is no direct evidence linking topical homosalate to fertility issues, the precautionary approach during the preconception period favors minimizing exposure to potential endocrine disruptors. Mineral sunscreens offer effective sun protection without hormonal concerns and are often recommended for women planning pregnancy.
Homosalate and PCOS
Caution Advised
- Endocrine disruptor
- Interferes with hormones
Homosalate is a chemical UV filter with potential endocrine-disrupting properties. Research suggests it may interact with hormone receptors, including estrogen and androgen pathways, though the effects are considered weak. For women with PCOS, who already experience hormonal imbalances involving androgens and estrogen, there is theoretical concern about using ingredients with endocrine activity. While the clinical impact of topical homosalate on PCOS symptoms is unknown, some endocrinologists and dermatologists recommend that women with hormone-sensitive conditions consider mineral sunscreens to avoid any potential hormonal interference. The concern is theoretical rather than proven, and homosalate is not explicitly contraindicated for PCOS. However, given that safer alternatives exist and PCOS involves complex hormonal dysregulation, women may prefer to minimize exposure to ingredients with any endocrine activity. Mineral sunscreens provide excellent protection without hormonal concerns.
Homosalate and general use
Caution Advised
- Endocrine disruptor
- Absorbed into the body
Homosalate is a widely used chemical UV filter that provides UVB protection in sunscreen formulations. It is often combined with other UV filters to achieve broad-spectrum protection and is valued for its lightweight, non-whitening properties. The main concerns with homosalate relate to its high systemic absorption and potential endocrine-disrupting effects. According to FDA studies, homosalate penetrates the skin and reaches blood plasma concentrations well above the FDA's safety threshold. Research indicates it may have weak hormone-disrupting properties, potentially affecting estrogen and androgen receptors. The clinical significance of these effects in healthy adults is debated, but the FDA has requested additional safety data. Some individuals, particularly those concerned about hormone health or with a history of hormone-sensitive conditions, may prefer alternatives. Homosalate remains approved for use in sunscreens in both the US (up to 15%) and EU (up to 10%), but is under ongoing review. The ingredient is not classified as GRASE (Generally Recognized as Safe and Effective) by the FDA due to insufficient long-term safety data. For the general public, using homosalate-containing sunscreens is still considered acceptable by most dermatologists, as sun protection benefits outweigh theoretical risks. However, mineral sunscreens (zinc oxide, titanium dioxide) are often recommended for those seeking alternatives with lower systemic absorption.
Everything else flagged for the same profiles
Related ingredients
Ingredients suggested in place of Homosalate, 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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