Indian herbal oil works to thicken and lengthen hair and fill in gaps. How to use: Put the entire oil in a box of dried herbs and leave it to ferment for 3 days, then use it on the entire hair from the roots to the ends for one to two hours. When the oil runs out in the box of herbs, you can refill it with the same oil or coconut oil. Use the herbs 3 times (fill the box of herbs with oil). Suitable for adults and children. Very safe for pregnant women and suitable for all hair types.