Understanding EIPH in Horses: Causes, Symptoms, and Treatments

What is EIPH?

Exercise-Induced Pulmonary Hemorrhage (EIPH), commonly referred to as "bleeding," is a significant concern for performance horses. This condition is notably prevalent in horses involved in high-intensity activities like racing, eventing, and polo. EIPH arises when the elevated blood pressure experienced during strenuous exercise causes the delicate capillaries in the lungs to rupture. This rupture leads to blood leakage into the alveoli, which are the tiny air sacs in the lungs. As a result, horses may experience diminished performance and increased recovery time.

Why Do Horses Experience EIPH?

During intense physical exertion, a horse's blood pressure can spike dramatically. This surge in pressure can cause the small blood vessels within the lungs to become stiff and weak. When these pulmonary capillaries cannot handle the pressure, they may burst, causing blood to leak into the lungs and respiratory system. This bleeding can impair the horse’s ability to breathe effectively and recover quickly, impacting their overall performance and health.

Recognizing Symptoms of EIPH

Identifying EIPH in horses is crucial for effective management and treatment. Key indicators include:

  • Coughing: Persistent coughing, especially if blood is visible in the mucus, can signal internal bleeding.
  • Poor Recovery Rate: Slower recovery times after exercise might suggest underlying bleeding issues.
  • Decreased Performance: A noticeable drop in performance levels can be a sign of EIPH affecting the horse’s respiratory efficiency.
  • Frequent Swallowing: Excessive swallowing can indicate that blood may be entering the throat from the lungs.

Can Vitamin C Help Horses with EIPH?

Benefits of Vitamin C for Equine Health

Vitamin C plays a crucial role in maintaining healthy blood vessels, which is beneficial for horses suffering from EIPH. The advantages of Vitamin C include:

  • Aids in Collagen Production: Essential for the strength and integrity of blood vessels, helping to prevent their rupture.
  • Supports Hemostasis: Important for blood clotting processes and repair of damaged vessels.
  • Maintains Iron Levels: Helps support the elasticity and strength of blood vessels and capillaries.
  • Promotes Red Blood Cell Formation: Enhances tissue repair and immune function while providing anti-inflammatory benefits.

How Bioflavonoids Can Benefit Horses with EIPH

The Role of Bioflavonoids in Reducing Bleeding

Bioflavonoids, naturally occurring in citrus peels, tea leaves, and various fruits, offer potent antioxidant and anti-inflammatory properties. These compounds help to strengthen lung capillaries, making them less prone to rupture during intense exercise. Their role in reducing oxidative stress and inflammation can contribute to better overall lung health in horses with EIPH.

Long-Term Management for Horses with EIPH

Effective Dietary Interventions

Although EIPH cannot be completely cured, dietary modifications can significantly aid in managing the condition. Adding anti-inflammatory and antioxidant-rich supplements to the horse's diet, such as capillary-strengthening powders, Vitamin C, and folic acid, can help reduce the frequency and severity of bleeding episodes.

Excel Vitality, with its combination of bioflavonoids and Vitamin C, is a valuable supplement for enhancing capillary strength and supporting overall equine health, making it a beneficial addition to the regimen of performance horses.


For more information on EIPH and managing equine health, check out the following sources:

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