Neem

What is Neem?

Neem is the leaf and bark of Azadirachta indica, a tall evergreen tree of the Indian subcontinent. Ayurveda knows it by its Sanskrit name, Nimba. It is a hardy tree, growing readily in poor, dry ground, with feathery leaves and small white flowers, and almost every part of it, leaf, bark, seed, flower and oil, has a place in the classical pharmacy.

What sets Neem apart is its taste. It is intensely bitter, and in Ayurveda bitterness is not a flaw but a tool. Of all the tastes, bitter is the one the tradition counts as most cooling, and Neem is the bitter herb the texts name first.

What Ayurveda uses it for

Neem is, above all, the herb of the skin. The classical authors place it at the head of the group they call kushtaghna, the herbs that care for the skin. It is used both taken inside, in small amounts, and applied outside as a paste or wash.

The tradition reaches for Neem whenever there is too much heat. It is raktashodhaka, a cleanser of the blood tissue in Ayurvedic thinking, and it is the herb most often paired with the idea of a cool, clear, settled Pitta. Its bitter taste is also classically tied to krimighna, the keeping of the body and its surroundings clean, and Neem twigs were among the oldest tooth-cleaning sticks Ayurveda describes.

Its qualities, in plain words

Ayurveda reads every herb through a short list of qualities, and Neem’s tell a clear story.

It is bitter and astringent, the two tastes that cool and tighten. It is cooling in its action, so it suits hot, sharp, inflamed conditions, the qualities the texts gather under Pitta. And it is light and dry, which is why it also settles the heavy, damp quality of Kapha. The same dryness is a caution: used too freely, a herb this bitter and drying can unsettle the light, dry quality of Vata, so the tradition uses it with care and rarely alone for long.

How it is taken

Inside, Neem is used sparingly, because it is so strong. The leaf is taken as a small dose of powder, or the bark is simmered into a decoction. More often it is found in named preparations where other herbs round off its bitterness.

Outside, it is simpler. The leaves are ground into a paste and applied, or the seed oil is used on the skin and hair. These external uses are among the oldest and most everyday in the whole tradition.

Good to know

Neem is potent, and the texts treat it that way. It is a herb of heat and damp, of summer rather than the dry cold of winter, and it is balanced by sweet, oily, nourishing partners when taken for any length of time. Its bitterness is the whole point of it, and also the reason it is used in measured amounts.

This entry describes the classical Ayurvedic understanding of the herb. It is not medical advice, and anyone with a health condition should speak to a qualified practitioner.

Frequently asked

Why is Neem so bitter? Because that is what it is for. In Ayurveda bitter is the most cooling and cleansing of the tastes, and Neem is the bitter herb the texts name first. The bitterness is the medicine, not a side effect.

Which part is used? Several. The leaf and bark are used internally and as washes and pastes; the seed oil is used on skin and hair. The tradition treats almost the whole tree as useful.

Is it warming or cooling? Cooling. Neem is a cold-natured herb, which is why it is reached for in hot, sharp conditions and why it pairs with the settling of Pitta rather than Vata.