Almond Hulls for Horses: Benefits, Safety, Digestibility, and What the Research Shows

Why Almond Hulls May Be One of the Healthiest Ingredients in Horse Feed
Horse owners today are looking for more than just calories from their feed. They want ingredients that support digestive health, metabolic balance, recovery, immune function, and long-term wellness.

One ingredient that has quietly attracted increasing attention from nutritionists and researchers is the almond hull.

While almond hulls have been used safely in livestock nutrition for decades, recent research has revealed that they are far more than just a source of fiber. Almond hulls contain highly digestible fiber, natural antioxidants, beneficial plant compounds, naturally occurring vitamins, and unique bioactive nutrients that may make them one of the healthiest ingredients available in modern horse feeds.
Before we discuss these benefits, let's address one of the most common myths surrounding almond hulls.

Defeating a Myth: The Truth About Almond Hulls and Cyanide
This is one of the most common misconceptions in horse nutrition. The confusion comes from the fact that almonds belong to the Prunus family. Certain parts of some Prunus plants, particularly bitter almond kernels and some seed materials, can contain naturally occurring compounds called cyanogenic glycosides that may release cyanide under specific conditions.

However, horse feeds do not use bitter almond kernels. Cowboy's Choice Feeds use almond hulls from sweet almonds. The almond hull is the soft, fibrous outer covering of the almond fruit. It is completely different from the kernel itself. 
Almond hulls have been used safely in livestock nutrition for decades and are recognized as a safe feed ingredient. The cyanide discussion applies to bitter almond kernels, not almond hulls.

In fact, a peer-reviewed equine feeding study published in the Journal of Equine Veterinary Science evaluated diets containing up to 45 percent almond hulls. Researchers reported no adverse effects, excellent palatability, and concluded that almond hulls are safe for horses.

Now that we have addressed the myth, let's look at why almond hulls have become one of the most exciting ingredients in modern horse nutrition.

• Benefit #1: A Highly Digestible Super Fiber
  Not all fiber is created equal. Many hays contain substantial amounts of lignified, less digestible fiber. Almond hulls provide a more soluble and digestible form of fiber that can be more easily utilized by the horse.
  Researchers demonstrated that as almond hull inclusion increased in horse diets, digestibility of both energy and dry matter increased. Horses readily consumed the diets and maintained excellent acceptance throughout the study.
  For horse owners, better digestibility means more usable nutrition and less waste.
• Benefit #2: Supports a Healthy Hindgut
  The horse's hindgut contains billions of beneficial microorganisms responsible for fermenting fiber and producing nutrients essential for health. Almond hulls contain fermentable fibers and natural prebiotic compounds that support beneficial microbial populations.
  A healthy hindgut supports digestion, nutrient absorption, immune function, manure quality, and overall wellness.
• Benefit #3: Supports Metabolic Health
  Research evaluating post-feeding glucose and insulin responses found that almond hull-containing feeds generated a very low insulin response compared to traditional grain-heavy feeding approaches. This makes almond hulls an attractive fiber source for horses that benefit from more stable insulin levels and controlled starch intake.
• Benefit #4: Natural Antioxidant Power
  Researchers have identified numerous beneficial compounds including chlorogenic acid, catechins, flavonoids, tannins, quercetin, kaempferol, and other polyphenols naturally present in almond hulls. These compounds help neutralize free radicals generated through exercise, stress, aging, illness, transportation, and normal metabolism.
• Benefit #5: Naturally Occurring Vitamin E
  Natural Vitamin E helps protect muscle tissue, supports nerve function, strengthens the immune system, and assists recovery after exercise. Almond hulls naturally contribute Vitamin E as part of their nutrient profile.
• Benefit #6: Naturally Occurring Vitamin K
  Vitamin K plays important roles in blood clotting, vascular health, and bone metabolism. Recent feed analysis found measurable Vitamin K in almond hulls while comparison feeds contained little or none.
• Benefit #7: Naturally Occurring CoQ10
  CoQ10 is a naturally occurring compound involved in mitochondrial energy production. Laboratory analysis has shown almond hulls contain significantly higher levels of CoQ10 compared to several common feed benchmarks.
• Benefit #8: Rich in Beneficial Plant Compounds
  Studies have identified chlorogenic acid, catechins, tannins, flavonoids, phenolic acids, and other plant compounds associated with antioxidant, anti-inflammatory, and microbial-balancing properties.

Myth #2: Almond Hulls Are Just a Cheap Filler
Scientific research says otherwise. Almond hulls contain digestible fiber, prebiotic compounds, antioxidants, polyphenols, naturally occurring vitamins, beneficial fatty acids, and bioactive plant compounds.

Why Cowboy's Choice Uses Almond Hulls
At Cowboy's Choice Feeds, almond hulls are used because they provide a unique combination of highly digestible fiber, prebiotic support, metabolic friendliness, natural antioxidants, naturally occurring Vitamin E, Vitamin K, CoQ10, and beneficial plant compounds.

The Bottom Line
Almond hulls may be one of the most misunderstood ingredients in horse nutrition. The scientific evidence shows they are safe, highly digestible, supportive of hindgut health, associated with a low insulin response, and naturally rich in antioxidants and beneficial plant compounds.

Sometimes the best nutritional innovations are not created in a laboratory. Sometimes they are found in nature. Almond hulls are a perfect example.