Hermetica Superfood Encyclopedia
The Short Answer
Homosalate is a salicylic acid ester primarily used as a UV filter in sunscreens, not as a dietary supplement. Limited research suggests potential endocrine disruption at high concentrations (≥250 μM), making it unsuitable for therapeutic use.
CategoryNamed Bioactive Compounds
GroupCompound
Evidence LevelModerate
Primary Keywordhomosalate supplement
Synergy Pairings3
Homosalate (Ester of salicylic acid) — botanical close-up
Health Benefits
Origin & History
Natural habitat
Homosalate is a synthetic chemical compound (homomenthyl salicylate) industrially produced as an ester of salicylic acid and 3,3,5-trimethylcyclohexanol, used as a UVB-absorbing filter in sunscreens and personal care products. It is not derived from any natural source but is chemically synthesized for cosmetic formulations.
“Homosalate has no traditional medicinal use history as it is a modern synthetic compound developed in the 20th century exclusively for cosmetic UV protection. It does not appear in any traditional medicine systems.”Traditional Medicine
Scientific Research
No human randomized controlled trials or clinical studies have tested homosalate as a therapeutic agent. The only human study (NCT02728293, n=24) examined pharmacokinetics of topical sunscreen application, showing plasma concentrations exceeded FDA safety thresholds (Cmax 210.82 ng/mL). A dermal toxicokinetics study in 4 volunteers confirmed systemic absorption with ~24h half-life, but investigated exposure safety rather than therapeutic effects.
Preparation & Dosage
Traditional preparation
No clinically studied therapeutic dosages exist for homosalate as it has not been investigated or approved for medical use. In cosmetic applications, concentrations of 5-15% are typical in sunscreens. Consult a healthcare provider before starting any new supplement.
Nutritional Profile
Homosalate (3,3,5-trimethylcyclohexyl salicylate) is a synthetic organic ester compound with molecular formula C16H22O3 and molecular weight of 262.34 g/mol. It has zero nutritional value as it is not a food ingredient, macronutrient, micronutrient, or dietary supplement. Macronutrient content: 0g protein, 0g digestible carbohydrates, 0g dietary fiber; lipid classification: technically an ester compound with lipophilic properties (log P ~4.5-5.0), meaning it is fat-soluble and capable of penetrating lipid-rich biological membranes and adipose tissue. No vitamins, minerals, or essential nutrients are present. Bioactive compound profile: contains a salicylate ester backbone derived from salicylic acid, absorbing UV-B radiation in the 295-315 nm range at concentrations typically 1-10% w/w in topical formulations. Dermal absorption is documented at approximately 1-2% of applied dose penetrating systemically per FDA 2019 GRASE data, with measurable plasma concentrations (mean Cmax ~0.5-2 ng/mL) detected after single application. Bioavailability via oral or inhalation routes is not formally characterized but lipophilicity suggests potential accumulation in fatty tissues. The compound is metabolized hepatically and detected in urine as conjugated metabolites. No caloric contribution; not intended for ingestion.
How It Works
Mechanism of Action
Homosalate functions as a chemical UV filter by absorbing UVB radiation (280-315 nm wavelength) through its benzene ring structure. In vitro studies indicate it may disrupt endocrine function by interfering with hormone receptor activity at concentrations ≥250 μM. The compound shows potential estrogenic activity through interaction with estrogen receptors in cellular models.
Clinical Evidence
Homosalate lacks clinical trials as a dietary supplement, with research focusing exclusively on topical UV protection applications. In vitro studies have demonstrated endocrine disruption potential at 250-500 μM concentrations in cell culture models. One study reported enhanced trophoblastic cell activity, raising concerns about pregnancy safety. No human supplementation studies exist to establish therapeutic efficacy or safe dosing parameters.
Safety & Interactions
Homosalate shows potential endocrine disruption effects at concentrations ≥250 μM in laboratory studies. Enhanced trophoblastic cell activity suggests particular caution during pregnancy and reproductive years. No established drug interactions exist due to lack of supplement use studies. The compound is not recommended for internal consumption given the absence of safety data and potential hormonal effects.
Synergy Stack
Hermetica Formulation Heuristic
Also Known As
Homomenthyl salicylate3,3,5-Trimethylcyclohexyl salicylateHMSSalicylic acid homomenthyl esterCyclohexanol salicylate ester
Frequently Asked Questions
What is homosalate used for in supplements?
Homosalate is not used in dietary supplements due to lack of therapeutic benefits and potential endocrine disruption. It remains exclusively a cosmetic UV filter ingredient in sunscreen formulations.
Is homosalate safe to take orally?
Homosalate is not recommended for oral consumption as no safety studies exist for internal use. In vitro research shows endocrine disruption at 250 μM concentrations, raising safety concerns.
What are the side effects of homosalate supplements?
No homosalate supplements exist commercially due to safety concerns. Laboratory studies indicate potential endocrine disruption and enhanced trophoblastic cell activity at high concentrations.
Can homosalate help with arthritis or inflammation?
Despite being a salicylic acid ester, homosalate has no documented anti-inflammatory or arthritis benefits. Research focuses only on UV protection, not therapeutic applications.
What is the recommended dosage of homosalate?
No recommended dosage exists for homosalate as it's not approved or studied as a dietary supplement. The compound is only used topically in 4-15% concentrations in sunscreens.
Is homosalate safe to use during pregnancy?
Homosalate is not recommended for oral supplementation during pregnancy due to potential endocrine disruption observed in laboratory studies at elevated concentrations. In vitro research has shown homosalate may affect thyroid function and reproductive hormone pathways, raising safety concerns for fetal development. Pregnant individuals should consult with their healthcare provider before using any products containing homosalate. Currently, there is insufficient human clinical data to establish safety in pregnancy.
Does homosalate interact with thyroid medications or hormonal birth control?
Homosalate may theoretically interact with thyroid medications and hormonal contraceptives due to observed effects on endocrine-related gene expression in cell studies. However, no clinical interaction studies in humans have been conducted to confirm these risks at typical exposure levels. If you are taking thyroid medication (levothyroxine) or hormonal birth control, discuss homosalate supplementation with your healthcare provider before starting. The current evidence is limited to laboratory findings and does not establish definitive clinical interactions.
What does current scientific research actually show about homosalate as a supplement?
Homosalate has no documented clinical evidence supporting its use as a therapeutic supplement—all available research focuses on its use as a cosmetic UV filter in topical products. The few studies examining homosalate at the cellular level have focused on safety concerns (endocrine disruption) rather than health benefits. There are no human clinical trials demonstrating efficacy for any internal health condition. It is important to note that homosalate is not established as a legitimate biomedical supplement ingredient, despite being an ester of salicylic acid.
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