Nettle root powder is the dried and ground roots and rhizomes of the stinging nettle plant. While the leaf has a flavor like spinach, the pale, grooved rootstock has a much milder taste and a slight mucilaginous quality. Nettle root powder is traditionally used in teas and tonics. Nettle root powder is an easy-to-use form of the herb that may be added directly to foods, taken in capsules, or made into pastilles. The powder may also be incorporated into skin care products.