This wild yam is not sweet potatoes,it is a herb. If you use
all four,you would need a quarter tablespoon of each.Boil the water for
tea.I crush them and put them in a coffee strainer .Pour the water over the mixture ,let it sit for a few minutes and then drink it . This doesn't happen overnite ,but after you have been taking it for a while ,everyones body reacts differently ,some grow faster than others .