When a horse’s ability to breathe properly is disrupted there is a significant decrease in performance. Two of the leading causes of breathing issues within performance horses are allergies and exercise-induced pulmonary hemorrhage (EIPH). Nutritional support (including MSM, Citrus Bioflavonoids, Spirulina, Hawthorne, Grape Seed Extract, N- Acetyl L-Cysteine (NAC), Vitamin K and Vitamin A) can be helpful in helping support soft tissue function and the body to protect itself from oxidative stress to support a healthy immune response.