Holistic doctors use alternative medicine that includes a variety of herbal botanicals, minerals, vitamins, and various other natural products. Mostly they prescribe dietary supplements according to the condition. They include in their treatment to heal the whole body in order to strengthen the immune system of the patient so that the overall health of the patient can be improved. Also, they include probiotics products that are similar to the micro-organisms which are normally found in the human digestive tract in order to improve the digestive systems. These are available in foods such as yogurts.