This unique, naturally calming supplement for horses contains a herbal formula known for its calming effects. Also contains thiamine, L-tryptophan, magnesium and essential oils. This unique combination reduces stress associated with dietary deficiencies. Stress in equines manifests itself in many ways. Nervousness, aggression, stubborn behavior and handling difficulties are a few of the more common and easily seen problems. It is difficult for horse owners and veterinarians alike to determine the source of stress. It is common knowledge that dietary deficiencies can cause stress. A magnesium deficiency is widely recognised as a source of stress. Thiamine, essential for the function of neural tissues and important in the gastrointestinal function of monogastric animals is widely used to relieve stress in equines. Although it is not clear how they function, certain herbs have been shown to actively reduce stress.