In the summer heat or under intense work, horses rely on one essential function to stay safe: sweating. It’s easy to overlook how vital sweat is to a horse’s overall performance, comfort, and health—until something goes wrong. Anhidrosis, or the inability to sweat, can have serious consequences for equine athletes and pasture companions alike.

Let’s break down why horses must sweat, the warning signs of anhidrosis, and how Sweat More can support healthy thermoregulation and restore your horse’s natural cooling ability.

Why Sweating Matters in Horses

Unlike humans who use multiple methods to regulate body temperature, horses rely heavily on sweating to cool themselves. In fact, sweating accounts for up to 70% of a horse’s total heat loss during exercise. Horses produce large volumes of sweat through thousands of sweat glands across their body. This moisture evaporates off their skin, carrying heat away with it.

Without the ability to sweat, a horse’s core body temperature can rise rapidly—even to dangerous levels—leading to:

• Fatigue

• Dehydration

• Heat stroke

• Poor performance

• Organ stress or failure in extreme cases

Sweating isn’t just a side effect of effort—it’s essential to survival.

What Is Anhidrosis?

Anhidrosis is the medical term for a partial or complete inability to sweat. It’s most commonly seen in hot, humid climates, but can affect horses anywhere—especially during the summer or periods of increased physical activity.

Signs Your Horse May Be Struggling to Sweat:

• Dry coat even during or after intense work

• Panting or rapid breathing

• Flared nostrils and elevated heart rate

• Lethargy or refusal to work

• Patchy or minimal sweating (often in just small areas like behind the ears)

• Dry, dull coat and lack of appetite over time

Left untreated, anhidrosis can become chronic and severely limit your horse’s ability to perform or even live comfortably in warm weather.

Why Anhidrosis Happens

The exact cause of anhidrosis isn’t fully understood, but it’s believed to involve overstimulation or burnout of the sweat glands due to prolonged heat stress, electrolyte imbalance, or an altered cellular response to stress hormones. Genetics may also play a role, as certain breeds (like Thoroughbreds and Warmbloods) appear to be more susceptible.

How "Sweat More" Helps

Sweat More is a powerful, all-natural supplement formulated specifically to support horses experiencing anhidrosis. Backed by years of field results and equine health science, it works by addressing the root causes of sweating issues rather than just masking symptoms.

What Makes Sweat More Different:

• Supports adrenal function and cellular response, which can help restore the body's natural sweating triggers.

• Promotes detoxification and circulation, two critical pieces of the puzzle in horses suffering from heat stress.

• Provides targeted nutrients that nourish the sweat glands and help reset the horse’s natural thermoregulatory functions.

• Results seen in as little as 5–10 days, with many horses returning to a normal sweat response within weeks.

Sweat More has become a go-to solution for owners, trainers, and veterinarians managing horses with heat intolerance or anhidrosis—from top-level performance horses to senior retirees.

If your horse isn’t sweating—or not sweating enough—it’s not just a nuisance. It’s a health emergency waiting to happen. Monitoring your horse’s sweat response and taking early action can prevent dangerous heat buildup and protect their long-term well-being.

Sweat More by Oxy-Gen Equine is a trusted, effective way to restore the body’s natural cooling system and give your horse relief from the dangers of heat stress and anhidrosis.

Don’t sweat the summer—help your horse do it naturally.