Overview

Neem (Azadirachta indica) is a tree that grows in tropical regions such as India. The leaf extract is used to reduce tooth plaque and to treat lice.

Neem contains chemicals that might help reduce blood sugar levels, heal ulcers in the digestive tract, prevent pregnancy, kill bacteria, and prevent plaque from forming in the mouth.

People use neem for lice, tooth plaque, gingivitis, psoriasis, to repel insects, and for many other purposes, but there is no good scientific evidence to support most of these uses. Neem seed oil is used as a pesticide.

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