APF is a synergistic blend of phytonutrients called adaptogens and represents an entirely new approach to equine nutrition. APF’s broad protective benefits support your horse’s natural ability to “adapt” to stress. These unique nutrients guard against the damaging effects of stress through every stage of your horse’s life — beginning with the developing musculo-skeletal and immune systems of the foal to the geriatric needs of the senior equine companion. The concentrated liquid formula is readily absorbed and can be easily mixed into your horse’s feed. It is safe and recommended for long term use.