COBECO - TREATMENT 1 MONTH PENIS INCREASE 60 CAPSOne of the active ingredients in the tablets is Tribulus Terrestris. This substance plays a very important role in the production of Luteinizing Hormone or LH. LH stimulates testosterone production in the male testicles. Higher testosterone levels strengthen the body, energy and libido. All this helps to achieve an erection and maintain it firmly. Siberian Ginseng helps regulate the production of sex hormones and improves sexual desire by increasing