FGF21 - Diet: A 'Miracle Hormone' That Makes You Slim? A New Approach To Repair Your Metabolism And Get Slim? FGF21 - The 'fountain of youth' hormone. Could this help you live a longer, healthier life? Since its discovery in 2000 by researchers in Japan, it has been named as having 'almost magical properties'. It has been suggested that to release this hormone, your diet needs to be low protein - high carb. Does this mean you could eat whatever you like? Don't inhale all the cakes and doughnuts just yet! Research also shows the answer could be with fasting or even overfeeding. To learn everything you need to know about this hormone, research findings, and its benefits - read 'FGF21 - DIET' now.