Biotin is one of the most talked-about supplements for horses, particularly when it comes to hoof health. But is it always necessary? How does it actually work, and what role does your horse’s gut play in biotin production? In this guide, we’ll cover what biotin does, when it’s needed, and whether supplementation is the right choice for your horse.

What Is Biotin and How Does It Work? (EquiSearch) (Geor et al., 2013) (EquiSearch)

Biotin, also known as Vitamin B7, is a water-soluble vitamin essential for keratin production, the structural protein that makes up hooves, skin, and hair. It supports:

• Hoof Wall Strength: Essential for reducing brittleness and cracks.
• Keratin Production: Building strong, durable hooves.
• Skin and Coat Health: Promoting a shiny, healthy coat.

Horses naturally produce biotin in their hindgut through microbial fermentation (Davis & Mullen, 2017). In a healthy horse with good gut function and a forage-rich diet, hindgut microbes typically produce sufficient biotin to meet daily needs.. In a healthy horse with good gut function and a forage-rich diet, hindgut microbes typically produce sufficient biotin to meet daily needs.

Does Every Horse Need Biotin Supplements? (KER) (NRC, 2007) (KER)

The short answer is no. Most horses with a balanced, forage-based diet and healthy hindgut function do not require additional biotin. Hoof problems are often a symptom of poor gut health, inadequate nutrition, or environmental factors rather than a simple biotin deficiency.

When Biotin Supplementation Might Be Necessary:

• Horses with Brittle or Shelly Hooves: Where consistent cracks and chips occur.
• Poor Quality Forage: Diets low in natural biotin sources.
• Prolonged Antibiotic Use: Which can disrupt hindgut microbial balance.

How Much Biotin Does a Horse Need? (SmartPak Equine)

Research suggests that 5-7.5mg per day of biotin is sufficient for most horses to support hoof health (NRC, 2007). However, in cases of severely compromised hooves, doses as high as 50mg per day have shown benefits (Geor et al., 2013). for most horses to support hoof health. However, in cases of severely compromised hooves, doses as high as 50mg per day have shown benefits.

Biotin Concentrations in Supplements:

• Standard biotin supplements contain between 10–20mg per 100g.
• Premium products, such as Kelato BiotinMAX (Kelato Animal Health), provide up to 50mg per 100g.

Gut Health vs Biotin Supplements: Which Is More Important? (TheHorse.com)

The hindgut acts as the horse’s natural biotin factory (Davis & Mullen, 2017). If gut health is compromised (e.g., through poor diet, stress, or antibiotics), biotin production drops, leading to poor hoof quality.. If gut health is compromised (e.g., through poor diet, stress, or antibiotics), biotin production drops, leading to poor hoof quality.

Correcting Gut Health Before Supplementation:

• High-Quality Forage: Essential for microbial balance.
• Prebiotics and Probiotics: Support gut microbial populations.
• Reduced Grain Overload: Prevents hindgut acidosis.

In my clinical experience, addressing gut health often has equal or even greater effects on hoof health compared to biotin supplementation.

Signs Your Horse Might Benefit from Biotin

• Persistent hoof cracks or chips
• Slow hoof growth
• Poor coat condition
• History of digestive issues

If these signs persist despite a well-balanced diet, biotin supplementation may be worth considering.

The Best Biotin Supplements for Horses (SmartPak Equine) (Geor et al., 2013) (SmartPak Equine)

When selecting a biotin supplement, consider:

• Concentration: Look for products offering 10–20mg per 100g.
• Additional Nutrients: Zinc, copper, and methionine enhance biotin’s effectiveness.
• Recommended Product: Kelato BiotinMAX (Kelato Animal Health) for its high biotin concentration and proven results.

Final Thoughts: Should You Feed Your Horse Biotin? (NRC, 2007) (Davis & Mullen, 2017)

Biotin supplementation can be beneficial, but it’s not a one-size-fits-all solution. Start by evaluating your horse’s diet, gut health, and hoof care routine before reaching for a supplement.

• For Maintenance: 5-7.5g/day
• For Compromised Hooves: Up to 50mg/day

If gut health is compromised, correcting it should always be the priority before relying solely on biotin.