Peptides occur naturally in the body and are present in every living cell. Like proteins, peptides are composed of amino acids and created when two or more amino acids are joined together.
Male sexual arousal is a complex process that involves the brain, hormones, emotions, nerves, muscles, and blood vessels.
Low testosterone affects 4-5 million men. Most men experience a decline in their testosterone levels after the age of 30 as part of the natural aging process.