Permen contains a combination of herbal substances and L-arginine. Ginseng helps to induce and improve erection. Ginseng also helps to counteract fatigue and to promote vitality.&Tribulus terrestris&promotes virility and might enhance libido.It promotes sexual desire and capacity. L- arginine is the precursor of nitric oxide, a molecule which in turn plays a key role in the regulation of blood circulation via its effects on blood vessels. Permen is recommended for long term usage.