Feed Horse Immune System | BioStar US

Feeding your horse’s immune system

There are specific foods that can aid and support a healthy immune system for your horse. Stress, nutritional deficiencies, and aging can affect the appropriate functionality of the immune system. This can result in pathogens being able to breach the defense systems of the body.

Stress: can come from environmental factors, chronic conditions such as ulcers, as well as competitions, shipping, injuries, lay up, metabolic imbalances, and daily training.

Nutritional deficiencies: can result from not enough forage and hay, as well as low-quality hay. Deficiencies can also occur when feeding processed feeds if the recommended amount per day is not fed. Some nutritional deficiencies are a result of metabolic issues such as PSSM, EPSM, and HYPP.

Age: Older horses can have weaker immune systems due to the aging process.

Digestive health

It is often said that the GI tract is the seat of a horse’s immune system. This is because 60% of lymphatic tissue surrounds the digestive tract. The lymphatic system provides barriers to infection and plays a critical role in immune responses.

What we feed is not only about protein, fat, fiber, carbohydrates, and calories; it is also about the quality of the food itself. The question we want to ask of every feed and supplement we use is, “Are these ingredients going to decrease stress on the GI tract or increase stress on the GI tract?”

Horse grazing for the immune system

Important foods for the horse immune system

Colostrum Powder for the Horse Immune System| BioStar USBovine colostrum: contains over 80 different immune factors including specific immunoglobulins (antibodies) that are a critical part of the immune response because they bind to antigens like bacteria and viruses. Bovine colostrum also provides the PRPs (proline-rich polypeptides), that have a unique ability to regulate the thymus gland, which is the master of the immune system. Bovine colostrum’s activity is measured by the percentage of immunglobulin G, known as IgG. The higher the IgG is, the more potent the colostrum.

Spirulina for the horse immune systemSpirulina: known as blue-green algae, is a phyto-nutrient dense food. Recent studies have shown that it can augment interferon production and can protect against intracellular pathogens. In animal studies spirulina has shown to be an effective immunomodulator: suppressing the release of histamines; making spirulina a very important food for horses with allergies.

Red Reishi Mushroom for the Immune SystemMedicinal Mushrooms: used for thousands of years in Traditional Chinese Medicine, recent research demonstrates the remarkable immunological properties of these fungi. The most studied medicinal mushrooms include: Turkey Tail, Reishi, Shitake, Cordycepts, Chaga and Maitake.

coconut for the horse immune systemCoconut Oil: provides two important immune support compounds: lauric acid and caprylic acid. Lauric acid is converted into monolaurin in the body, which has anti-viral, anti-bacterial, and anti-protozoa properties. Caprylic acid is beneficial for dealing with fungal infections.


Supportive foods for your horse’s immune system

PapayaAntioxidant Fruits: apples, oranges, pomegranates, kiwi, papaya, mangoes, blueberries provide specific nutrients and antioxidant compounds such as: vitamin C, quercitin, bioflavonoids, polyphenols, and anthocyanins.   Antioxidants can help reduce oxidative stress, and reduce inflammation.

holy basil - BioStar USAdaptogenic Herbs: plants categorized as adaptogens are those herbs that must specifically reduce stress, be completely safe and non-toxic, and have a normalizing action (neither over stimulating nor inhibiting normal body systems functions). Adaptogens exert a tonifying effect. Key adaptogenic herbs for horses include: Ashwaganda, Holy Basil, Ginseng, Maca, Rhodiola Rosea, and Schisandra.

carrotsAntioxidant Vegetables: carrots, squash, pumpkin seeds, kale, and alfalfa provide important antioxidant vitamins such as beta- carotene, vitamin C and vitamin E.


chia seedsFlax seeds, and chia seeds: these mucilaginous seeds coat the mucous membranes and prevent irritation of the nerve endings. This is especially beneficial to the GI tract. Flax and chia seeds are excellent food sources of omega 3 fatty acids, and provide anti-inflammatory actions.


Hemp seed oil: one of the best sources of GLA (Gamma Linoleic Acid), which the body uses to reduce the inflammatory prostaglandins.  GLA is particularly beneficial to the GI tract and specific to the hindgut.


MCT Coconut OilCamelina oil: provides the perfect ratio of omega 3:6:9, and is one of the richest food sources of the antioxidant vitamin E.



Remember the foundation of a healthy horse immune system begins in the gut. Reducing stress, and providing quality hay and forage and feed is essential. If your horse shows early signs of stress, it is important not to ignore those signs.


Tigger Montague | BioStar USAbout the Author: With over 30 years experience in the equine and human supplement industry, Tigger Montague knows nutrition from the synthetic side as well as the whole food side. She started BioStar US in 2006 with formulas she created in her kitchen.  Before she started the company, she was an avid rider and competitor with eventing and show jumping, until she got hooked on dressage in the late 1980’s.  She has competed on horses she’s owned and trained all the way from training level to Grand Prix.


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1 Response

  1. James Bergman says:

    It sounds like I should be feeding my horse the same fruits and vegetables I am supposed to eat. It does shock me a little bit, but healthy food is just healthy food. Just as a side note, the only reason I would buy kale is for my horse. I find it too tough for me, even if it is supposed to be a super food.