Similar to Extreme, Perfect Prep EQ™ Supreme is quick acting, targeted horse calming supplement formula with Vitamin BeHave that creates an even greater calming effect. Use 90 minutes before increased stress. Effects begin within 1 hour and last up to 6 hours. Industry-leading full 80cc of targeted active ingredients. Works well alone or as part of the Perfect Prep EQ™ Calming System. Contains no prohibited substances.