Testosterone is the main hormone which is associated with muscle, strength and sex drive. It occurs naturally in our body especially at a much higher rate in men than women.
Natural testosterone boosters different from Anabolic Steroids as they work on increasing your natural testosterone levels which has little to no side effects rather than Anabolic Steroids ie external hormones going into your body. Anabolic Steroids shut down your Hypothalamic-pituitary-gonadal Axis, which then leads to more side effects.
Natural testosterone boosters often contain herbs that increase testosterone naturally in your body.