GNC Men's ArginMax is an advanced sexual health formula. This patented formula helps support sexual desire and improves sexual performance and staying power. ArginMax features L-Arginine, an amino acid that enhances nitric oxide production. Nitric oxide helps maintain blood vessel tone, which plays a key role in sex. Also contains zinc, which is required for normal reproduction function.* This formula includes a blend of American and Asian ginseng, an herb traditionally used to support vitality and overall well-being.* ArginMax has antioxidants to protect cells from harmful free radicals