Horses in the wild would eat a large variety of different plants in their diet and so consume an enormous range of organic compounds. Most of these are completely missing from modern, cultivated pastures and manufactured horse feeds. Although the main, headline nutrients might all be present, the micro-nutrients which have much more subtle effects can be absent. Providing natural herbal supplements to horses makes even more sense than it does to humans. It is claimed that about 25% of the prescription drugs dispensed in the United States contain at least one active ingredient derived from plant material. Herbalism indeed forms the basis of many modern human pharmaceuticals. Providing the natural, organic herbs to horses allows their bodies to absorb and utilise these important nutrients in a naturally beneficial way.