Thunderbrook Equestrian Performance Energizer features a blend of fruits, herbs and botanicals to support healthy metabolic functions in horses competing at high levels and in intense work. For when your horse lacks oomph and sparkle, but you don#t want fizzy behaviour, try Performance Energizer. Ingredients Spirulina pratensis, Hawthorn fruit, Bilberry fruit,Nettle, Fractionated Nutritional Yeast, Ginseng, Cranberries, Cinnamon, Calendula, Orange, Jiaogulan Rhodiola rosea.