Understanding How Equine Supplements Are Actually Absorbed
👉 Can the horse actually absorb and use it?
Because if nutrients aren't absorbed properly, they simply pass through the digestive system with little benefit.
Understanding how Equine Supplements Actually Get Absorbed
1️⃣ It All Starts in the Mouth
When a horse chews, feed mixes with saliva. Saliva doesn't break nutrients down significantly, but it lubricates the feed and helps nutrients move smoothly into the stomach. Good chewing and saliva production are the first steps in healthy digestion.
2️⃣ The Stomach — Breaking Things Apart
The stomach uses acid and enzymes to begin breaking down nutrients. Here:
Minerals begin ionising into absorbable forms. Proteins and amino-acid–based supplements start digesting. Some vitamins begin processing.
Fat-soluble vitamins (A, D, E & K) and oils are mainly prepared here before absorption later in the gut. The stomach's main role is preparation — most nutrient absorption happens further along the digestive tract.
3️⃣ The Small Intestine — Where Absorption Really Happens
This is the powerhouse of nutrient uptake.
Here the horse absorbs:
✔ Amino acids for muscle repair and development
✔ Most vitamins
✔ Oils and omega fatty acids
✔ Simple sugars
✔ Many mineral forms, especially chelated minerals
Why this matters for supplements
Chelated minerals and high-quality vitamin forms are absorbed more efficiently because they pass through the intestinal wall more easily. This is where formulation quality makes a huge difference. A poorly formulated supplement may contain nutrients on the label — but not in forms the horse can effectively absorb.
4️⃣ The Hindgut — Fermentation & Slow Nutrient Release
The caecum and colon contain billions of microbes that ferment fibre and support overall digestive health. Supplements that benefit the hindgut include:
✔ Probiotics & yeast cultures — support healthy microbes
✔ Prebiotics — feed beneficial bacteria
✔ Fibre-based supplements — improve fermentation efficiency
✔ Some slow-release electrolytes
The hindgut also produces: B-vitamins Volatile fatty acids (important energy sources) A healthy hindgut is essential for overall condition, immunity, and performance.
Bloodstream Transport — The Real Goal
Once nutrients cross the intestinal wall, they enter the bloodstream and travel to where they are needed most:
Joints
Muscles
Bones
Reproductive organs
Immune system tissues
This is where you see real-world results such as:
✔ Improved fertility
✔ Stronger bone development
✔ Better recovery
✔ Healthier joints and hooves
👉 No absorption = no results.
6️⃣ What Affects How Well a Supplement Is Absorbed?
Many horse owners are surprised by how many factors influence absorption:
✔ Nutrient form (chelated minerals are generally absorbed better than inorganic forms)
✔ Gut health
✔ Feeding timing
✔ Mineral interactions (for example, excess calcium can interfere with trace mineral uptake)
✔ Ingredient quality
✔ Vitamin stability (heat and sunlight can damage certain vitamins)
Poor absorption is one of the biggest reasons low-cost supplements fail to deliver consistent results.
7️⃣ Why a Well-Formulated Supplement Matters
A properly designed supplement helps ensure:
✔ Nutrients remain stable until absorption
✔ Ingredients reach the correct part of the digestive system
✔ Minerals do not compete excessively with one another
✔ The horse can efficiently utilise the nutrients provided
That's the difference between simply adding ingredients… and creating a formulation that genuinely supports performance, fertility, development, and long-term health.
Equine Products Ireland® working with top equestrians on 4 continents. https://equineproductsireland.com/