Yest Horse: Digestion & Nutrient Support

Organic grass, brewer’s yeast, apple, beetroot, quackgrass root, chicory, and milk thistle.

VetCur Yest Horse – Advanced Muscle-Building, Digestive & Absorption Support

Does your horse stay weak over the topline no matter how you feed and work them, or swing between loose manure and gassy, uncomfortable days? When the gut lining and microbiome are under strain, the body simply can’t pull enough amino acids and nutrients out of the diet to build muscle, repair tissue, or sustain steady energy.

Yest is an amino-acid–rich, prebiotic-focused supplement designed to feed the gut first so the rest of the body can finally catch up. Inactive yeast cultures and prebiotic plants help nourish beneficial microbes and support a healthier gut lining, while naturally occurring amino acids and phytonutrients from grasses, fruits, roots, and milk thistle back up muscle repair, digestion, and metabolic resilience from the inside out.

Best For Horses Who:

• Need help developing and maintaining topline and overall muscle tone
• Have digestive imbalances, inconsistent manure, or signs of poor nutrient absorption
• Are performance horses needing more efficient fuel use, stamina, and post‑work recovery
• Are recovering from illness, stress, travel, or injury and need help rebuilding from the gut outward
• Are young horses whose developing muscles and digestive systems both need support

Core Muscle & Gut Matrix

Whole‑food ingredients, with no fillers, chosen to feed the gut microbiome, support the digestive lining, and supply amino acids and phytonutrients for muscle and metabolic function.

Ingredients: Grass, Inactive Yeast Cultures, Apples, Carrots, Couch Grass Root, Chicory, Milk Thistle.

How to Feed & Dosage

Mix into feed daily to support digestion, nutrient absorption, and gut microbiome health. Use the scoop provided (approx. 0.21 oz per level scoop).

How long does a bucket last?
A 9.26 lb bucket of Yest will last approximately 92 days if 1.08 oz is used per day.

Pairs Well With

• ViVet Horse – a daily vitamin, mineral, and electrolyte foundation that covers baseline requirements while Yest focuses on gut efficiency and muscle support.
• DiVet Horse – for horses needing more intensive digestive support, DiVet can be used alongside Yest when you want to address both gut function and the body’s ability to turn feed into muscle and strength.

Frequently Asked Questions

Q: Is Yest a muscle builder or a gut supplement?
A: Both. Yest is built on the idea that you don’t get real, lasting muscle without a healthy gut. It combines inactive yeast cultures and prebiotic plants to support the microbiome and gut lining, while whole‑food ingredients provide amino‑acid–rich support so the body can actually use protein from the rest of the diet to build and repair muscle.

Q: What does Yest pair well with?
A: Yest is a stand‑alone formula that focuses on digestion, absorption, and muscle support. Many horses do well with Yest plus ViVet Horse as a daily base, and DiVet Horse can be added in more intensive gut cases under veterinary guidance.

Q: How soon might I notice a difference?
A: Some horses show changes in manure quality, appetite, or post‑work recovery within a few weeks. Visible topline and muscle changes usually follow over a longer window as the gut stabilizes and new tissue is built.

Q: Can Yest be used in ulcer‑prone or sensitive horses?
A: Yest is designed to be gentle and supportive to the digestive tract and microbiome. As with any supplement in an ulcer‑history or highly sensitive horse, work with your veterinarian to integrate it into a broader management plan (forage, feeding schedule, stress, and medication where needed).

This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your veterinarian before starting any new supplement or changing your horse’s care plan.

Founder’s Note

Yest came out of watching horses who were “eating plenty” but still looked like they were running on half a tank—weak toplines, inconsistent manure, and bodies that just wouldn’t hold the work. Once we stopped thinking about muscle in isolation and started with the gut and microbiome, the picture changed. Yest is the formula I reach for when a horse needs a better engine, not just more fuel: a healthier gut, cleaner absorption, and the building blocks to actually turn feed into strength.

Orders ship within 1–2 business days. Standard U.S. delivery usually takes 3–7 business days after dispatch, with tracking provided.

Free U.S. shipping on orders $200 USD or more after discounts. Mix and match products to reach the threshold. We ship via UPS and USPS.

For ViVet Horse, Beginner Horse and Yest Horse, free shipping is available in the contiguous U.S. only; other destinations have shipping charges at checkout.

Try it with confidence. Your first purchase of each product is covered by our 90-day satisfaction guarantee, starting on the day it is delivered.

If it is not the right fit, email info@herbsforanimals.com within 90 days of delivery to arrange a return. The guarantee covers one bottle or container of each product per customer or household, from the first purchase of that product, opened or unopened.

Additional bottles from bulk orders and repeat purchases, including later subscription deliveries, are excluded—even if unopened. Customers pay return shipping; original shipping charges are non-refundable.

Read our full return and satisfaction guarantee policy.