It is among the most popular supplements available on the market, thought to have just the right combination of ingrediants stimulating the increase in testosterone levels. It claims to help build muscles, boost endurance, stamina and libido, lift up the spirits and block the production of estrogen. Among its ingredients is aspartic acid, present in the brain where it stimulates the release of luteinizing hormone( LH), essential for the testosterone production, and it has also been proven that aspartic acid helps produce growth hormone and follicle-stimulating hormones. The research has shown that intake of aspartic acid during a period of one year can increase the level of testosterone by 50%.
Another ingredient of TestoFuel is vitamin D3 (http://www.friskey.de), which also has many hormone properties, a nutrient that develops through the sun exposure. In the majority of cases, we do not receive enough D3 vitamin if we are working in closed spaces, or living in the countries with cloudy weather. Low intake of vitamin D3 may result in men having lower levers of unbound testosterone, and it has also been proven that vitamin D3 helps increase these levels. Final important ingredient is ostrich extract, an important source of zinc, having it in far largel quantities than meat, and it also contains a numbre of essential oligo-elements such as amino acids and vitamins. Zinc is necessary for brain processes that create luteinizing hormone, without which testosterone can not be produced.
So far, serious side effects of this supplement have not been reported, contains no illegal substances and those who use it report muscle growth and faster recuperation, increased motivation and energy levels and ability to lift more weight in the gym, exactly as claimed by its producer. But it not without negatives, such as not being sold in shops or other web pages( but only on the web page of its producer Roar Ambition), and that it comes with a money-back guarantee only if bought in quanitites for three months.