Our black walnut hulls powder makes a great addition to a wide range of products, including soap, cosmetics, bath and body products, and hair care. When used in soap making, black walnut hull powder creates a natural brown color, and it can also be added to primary colors to tone them down and make them look more natural. Those interested in natural hair dying will love this powder when looking for a more natural brown-black hue. Black walnut hulls contain natural iodine, magnesium, potassium, copper, and manganese.