The internal medicinal uses of Neem include malaria, tuberculosis, rheumatism, arthritis, jaundice and intestinal worms as well as skin diseases. It also has alternative (increases vitality) properties. The oil is NOT normally taken internally - but as a decoction made from the leaves. The extract of Neem leaves has also demonstrated significant anti-diabetic potential. Neem oil is generally light to dark brown depending on the time of harvest as well as growing conditions before harvesting. It is bitter and has a strong odor �¢â?¬â?? described by some as a combination of the smell of peanut and garlic.