Phytotherapy

Oregano

Origanum vulgare

Mechanism

Oregano (Origanum vulgare) contains an essential oil whose main phenols carvacrol and thymol are held responsible for the antimicrobial activity demonstrated in vitro (membrane disruption in bacteria and fungi). Oregano is traditionally used to support digestion; in livestock feeding, oregano-based additives are credited with a gut-stabilising effect. Robust controlled studies on clinical endpoints in the horse are lacking; the in-vitro effect cannot be transferred directly to oral application in the equine gut.

Cautions

· Essential oils are dose-dependently irritating to mucous membranes — dose moderately
· Not sufficiently studied in pregnancy/lactation — avoid
· In-vitro data not to be equated with oral efficacy in the horse

Sources

EMA/HMPC Origani herbaEMA/HMPC — Oregano-Monographie (Origanum vulgare L.)

PMID:29744941Sharifi-Rad et al. 2018 (Cell Mol Biol) — Review Carvacrol/Origanum, antimikrobiell

ReviewOriganum vulgare essential oil — antimicrobial activity (In-vitro-Review)

Equiterna Score

57/100

solid

Science4.5/10

Practical experience6/10

Safety7/10

Overall score scale

high overall75–100solid55–74limited0–54

How the Equiterna Score is built

The Equiterna Score combines three dimensions into a value of 0-100: science (40%), practical experience (30%) and safety (30%). It is transparently derived from evidence level, attributed sources (PubMed/journals), legal classification and cautions. The FEI doping status is shown separately as a competition-law note and does not enter the score. Commissions and vendor relationships have no influence on the score. In addition, the editorial safety rating caps the result: it limits the safety dimension and the overall tier (orange: at most solid). For entries rated red, no score is calculated at all. The rating never raises anything — a green rating does not lift a calculated value.

An editorial assessment of the evidence and safety situation — not a healing claim and not an individual recommendation. It does not replace veterinary advice.

Dosageproduct-specific (herb or standardised oil); essential oil only at low dose, introduce gradually

AMG statusComplementary feed

FEI statusNot listed

SafetyWith caution

Evidenceemerging

Frequently asked questions

Is Oregano a feed or a veterinary medicine for horses?

Equiterna classes Oregano as “Complementary feed”. Legal framework: Regulation (EU) 2019/6 / TAMG (DE/AT), Feed Regulation (EC) 767/2009.

Is Oregano allowed at FEI competitions?

In the profile, Oregano is listed with the FEI status “Not listed”. The current FEI list is authoritative, so please check its latest version.

Which dosage do the sources give for Oregano?

Stated in the profile: product-specific (herb or standardised oil); essential oil only at low dose, introduce gradually. This is information from the literature, not an instruction for an individual horse.

Which sources are there for Oregano?

The profile cites: EMA/HMPC Origani herba, PMID:29744941, and Review.

Usage note

This content is for information and education. It does not replace veterinary diagnosis or treatment. If your horse shows signs of illness, consult a veterinarian.

“Nothing forced can ever be beautiful.”

Xenophon · On Horsemanship (c. 365 BC)

Equiterna is an intermediary platform for equine knowledge, marketplace and tools — not a veterinary-medicines dealer, veterinary practice or pharmacy. Compound information is source-attributed (PubMed, specialist journals, NRC/GfE, EU regulations) and free of healing claims. Legal framework: Regulation (EU) 2019/6 / TAMG (DE/AT), Feed Regulation (EC) 767/2009, FEI Prohibited Substances List, HWG.

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