Tense, edgy, unfocused. If these words describe your horse, the right calming supplement may help him feel confident, focused, and at ease. Nutrient-based calming support often includes ingredients like magnesium and vitamin B1 to support proper nervous system function. Herbal calming supplements provide herbs such as valerian, chamomile, and vervain to support a relaxed temperament. Finally, formulas designed for moody mares contain targeted support for balanced hormones such as raspberry leaf. Want to find out more? Check out How to Shop for Calming Supplements or our Top 10 Calming Supplements. Note for Competitive Riders: Some competitive organizations prohibit certain ingredients in this and other product categories.