Neem is a tree grown probably first grown in India. For centuries, neem bark has been an effective toothbrush, because, anecdotally, it has been shown to decrease dental decay and to have antiseptic properties. Most medicinal claims regarding neem have not been subject to double blind clinical trials, so all possible benefits of neem should be considered as conjecture.

Neem is used as an anti-fungal, to remove lice, as a gel to prevent pregnancy, and in oral form to reduce fertility in men. It has been added to toothpastes to prevent gum disease and tooth decay. It is also thought to provide some relief to people who suffer from psoriasis, and it may be an effective insecticide.

Others claim that neem may reduce cholesterol, or help rid the body of bladder stones. It also is considered helpful to relieve itching caused by chicken pox or measles. Others might use neem to treat ear infections, or pinkeye. Some suggest using neem to treat piles or fistula caused after childbirth, but such used is not recommended.

Use of neem is contraindicated in pregnant women or nursing women, and it should not be used on children. It has been linked to extreme allergic reactions in children that have caused death, so any neem products should be kept far away from children’s access. Children should avoid toothpaste containing neem as well, since they are more likely to swallow the paste.

People may use neem oil, seeds or leaves depending upon their intended purpose. Eating the seeds in large amounts is undoubtedly poisonous and can cause death. Some prepare cooked neem leaves, considered to be good for intestinal health, but these have a markedly bitter taste and are not universally enjoyed.

Neem can counteract with even over the counter medications. Its use should always be discussed with a physician. Neem may ultimately prove a useful medicine but more studies need to be undertaken to understand safe dosage and possible drug interactions. As it stands now, unless guided by a physician, neem should probably not be used.