Neem, a natural supplement that has a number of uses, can be found at health food stores, as well as discount department stores such as Wal-Mart.
The bark, leaves and oil from the neem tree have been a part of natural medicine in India for centuries. According to the Discover Neem website, the neem tree is often called "the village pharmacy" in India, and is used in 75% of Ayurvedic treatments. Neem oil is used as a natural pesticide and insect repellent. The oil is edible as well and is especially delicious in stir fry dishes. The leaves of the neem tree can also prevent pregnancy, but should not be used as a sole means of contraception.
Powdered neem bark is a natural treatment for an upset stomach and helps to boost the function of the immune system. The bark has the same effect on pets. Neem bark powder can be sprinkled on dog food to prevent sickness in pets and soothe digestive upsets. Neem oil is used in shampoos and conditioners to improve the health of the hair without leaving a thick residue. The ingredient is included in pet shampoos as well to give pet's fur a fresh, berry-like scent.