DHA (Docosahexaenoic acid)

C22:6 n-3 · Docosahexaenoic acid

Mechanism

DHA (C22:6 n-3) is the longest and most highly unsaturated n-3 fatty acid and accumulates preferentially in neural tissue, retina and sperm membranes, where it helps determine membrane fluidity and the receptor environment. In stallions, targeted DHA intake has been associated with parameters of sperm quality (motility, membrane integrity after cooling and cryopreservation). For neural and retinal functions, the main evidence lies in human and laboratory-animal models and is transferred to the horse. DHA can theoretically be formed from ALA via EPA, but the conversion rate is low in the horse as in other species, so that marine sources (algal oil as a plant-based option, fish oil) represent the most reliable supply of preformed DHA. Controlled long-term equine data beyond the reproductive application are limited.

Cautions

· Preformed DHA is reliably available only via marine sources/algal oil - ALA supplementation barely raises DHA tissue levels.
· Oils oxidise rapidly; store cool/dark and cover the rising vitamin E requirement.
· Effects observed in semen studies are dose- and product-specific, not transferable 1:1 to other applications.

Sources

NRC 2007NRC - Nutrient Requirements of Horses (2007): kein definierter n-3-Bedarf

Brinsko et al. 2005Brinsko SP et al. 2005 (Theriogenology) - DHA-angereicherte Ergänzung und Hengst-Samenqualität (frisch/gekühlt/gefroren)

Hess & Ross-Jones 2014Hess T, Ross-Jones T 2014 (J Equine Vet Sci) - Review Omega-3 beim Pferd

Equiterna Score

78/100

high overall

Science7.7/10

Practical experience8.5/10

Safety7.2/10

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.

DosageNo defined minimum requirement (NRC 2007 / GfE 2014). Marine intake mostly as an EPA+DHA combination, guideline value approx. 20-60 mg long-chain n-3/kg BW/day total; in stallion semen studies specifically DHA-enriched supplements. Algal oil as a plant-based DHA source.

AMG statusComplementary feed

FEI statusNot listed

SafetyVery safe

Evidencemoderate

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 study-attributed and free of healing claims. Legal framework: Regulation (EU) 2019/6 / TAMG (DE/AT), Feed Regulation (EC) 767/2009, FEI Prohibited Substances List, HWG.