Max Size: Erectile Enhancement Formula Display Max Size male enhancement formula is a blend of 20 natural and herbal ingredients including 500mg of Yohimbe (3% alkaloids) which yields up to 15mg of Yohimbine HCL. Yohimbine HCL is the sole natural supplement listed in the Physicians Desk Reference to treat male impotence. Higher amounts have shown in studies to create side effects without increase in performance and/or function. Each 2,000mg serving contains unique ingredients ...(cnidium monnier, and xanthomelia scabrosafound nowhere else in this product category are widely acknowledged as precursors for PDE-5 inhibition which serves as the body's building blocks to naturally larger and firmer erections). Includes 24 2-Pill Packages.