Sexual Health 75 mg Per Capsule 4:1 Extract Herbal Supplement Traditionally Used to Promote Male Sexual Energy Traditional Energizing Herb Full Spectrum® Whole Bark Formula Science-Backed Quality Since 1969 Swanson Yohimbe Bark Powder capsules are a great way to help support sexual health. The gray-brown bark from an evergreen tree is used for health purposes, especially related to the circulatory system. Each capsule delivers 300 mg of yohimbe bark powder.