Thyme | whatsinit

About

What it is and where it shows up.

Thyme (Thymus vulgaris L.) is a perennial culinary and medicinal herb of the Lamiaceae family, widely used to flavour foods and known for its bioactive compounds including thymol and carvacrol. It is used as a seasoning, natural preservative, and traditional remedy for respiratory and gastrointestinal complaints.

Safety summary

The regulatory and scientific consensus.

Thyme is broadly safe for the general adult population at culinary use levels; no ADI has been established for the herb itself, and animal toxicity studies show no adverse effects at high dietary inclusion. Its essential-oil constituent thymol has been assessed as safe for food use by JECFA and EFSA. Very rare hypersensitivity reactions have been reported, and medicinal-dose preparations are not recommended for children under 4 years of age.

Regulatory landscape

What food-safety regulators have decided.

Jurisdiction	Status	Note
EFSA (European Food Safety Authority) (European Union)	Approved	EFSA FEEDAP assessed thyme essential oil (BIOSTRONG 510) as safe for use as a sensory feed additive in poultry at proposed conditions of use; thymol assessed safe in animal feed up to 5 mg/kg feed; no consumer safety concerns identified.source
FSSAI (Food Safety and Standards Authority of India) (India)	Approved	Thyme is recognised as a spice/herb under FSSAI Food Safety and Standards (Food Products Standards and Food Additives) Regulations, 2011. Herbs and spices are explicitly excluded from the food additives category and are permitted for use in food products without quantitative restrictions.source
FDA (Food and Drug Administration) (United States)	Approved	Thyme is listed as a spice under 21 CFR 182.10 and is classified as GRAS (Generally Recognized As Safe) for use as a seasoning and flavouring in food.source

Who should approach with care

Whose guidance would steer them away.

Infants — EMA assessment explicitly states that medicinal thyme preparations are not recommended for children under 4 years of age due to insufficient safety data for this age group.

Pregnancy — High-dose or medicinal use of thyme (beyond culinary amounts) has not been adequately studied in pregnant women; traditional herbalism guidance recommends caution with concentrated thyme preparations during pregnancy.

Other — Very rare hypersensitivity reactions to thyme have been documented in EMA post-market surveillance; individuals with known Lamiaceae (mint family) plant allergies should exercise caution.

Research citations

The sources behind this verdict.

1EMA. Assessment report on Thymus vulgaris L. and Thymus zygis L., herba. ema.europa.eu
2EFSA. Safety and efficacy of a feed additive consisting of a tincture derived from the leaves or aerial parts of Thymus serpyllum L. (wild thyme tincture) for use in all animal species, 2023. efsa.europa.eu
3PubMed. Effect of Thymus vulgaris L. essential oil and thymol on the microbiological properties of meat and meat products: A review, 2022. pmc.ncbi.nlm.nih.gov
4PubMed. A Focused Insight into Thyme: Biological, Chemical, and Therapeutic Properties of an Indigenous Mediterranean Herb, 2022. pubmed.ncbi.nlm.nih.gov
5EFSA. Safety and efficacy of BIOSTRONG® 510 (essential oil of thyme and star anise) for chickens and minor avian species, 2016. efsa.europa.eu

Independently researched5 citations