The natural ingredients in Biomax work together to improve blood flow to the penis. One example is that maca root has been shown to improve blood flow and sexual activity in men. Horny goat weed has been used as a natural stimulant for a very long time. It's thought to work by increasing nitric oxide levels, which can help relax penile muscles and make blood flow better. Tongkat Ali is another natural product that has been shown to improve sexual performance. It's meant to work by increasing the amount of testosterone in the body.