TestoGen is a natural testosterone booster with all-organic ingredients that were created with aging men in mind. Muscle Club Limited created this product testogen. Muscle Club Limited has been in business for over ten years and is based in Nottingham, United Kingdom. According to studies, testosterone levels in men peak and then begin to decline as they age, starting as early as their mid-twenties. This is a cause for concern, and solutions to restore these dwindling hormonal levels had to be found.