Organic Fo-ti (Polygonum multiflorum) 1:2 Ratio -LARGE High Strength 500ml Tincture. For Healthier Hair. This is a large, 500ml bottle of pure, high strength Fo-ti Root tincture. Also known as He-shou-wu, Fo-ti is a traditional Chinese herb used for sexual stimulation, anti-aging, immune support, and overall well-being.