Vitamin C, calcium, magnesium, zinc, caprylic acid, pau d'arco, grapefruit seed extract, garlic, licorice and tea tree oil, with lesser amounts of dong quai root, and fennel seed.
I don't know how long
to take the YC, but I'm several months into it, and can still see the difference in how I am feeling better. I think I had had a fungal sinus infection (such a dark, warm place!) that the yeast just decided to stay, so it's taking time to dislodge it, but I'm nearly there.