Neem capsules, such as these from Nature's Way, are generally used as part of detoxification protocols. Neem was originally an herb used in the traditional Ayurvedic medical system of India and Asia. Neem is a robust and fast-growing type of evergreen shrub which is highly to resistant droughts, insect and fungal pests, and other insults. Early herbalists, and even many modern herbalists, believed that by taking an herb internally, the most prominent traits of the plant are imparted to the the human patient. So neem was used both internally and externally to help the ill recover from various types of infections and other problems. Modern science has revealed that neem contains both insecticidal and fungicidal compounds, and some people have had success using neem externally for nail fungus problems. Used internally, neem can help recovery from some types of mild gastrointestinal problems such as those that result from consuming contaminated food or drinks.