When daidzein was injected in rats (16 days at 30mg per kg of body weight per day), muscle weight rose and growth hormone, endorphin and testosterone levels all increased. Human tests performed on Romanian and Chinese athletes confirmed that supplementing with soya protein produced similar results with increased lean body mass, reduced body fat, and increased resistance to fatigue. With regards to cardiovascular health and fat burning, soya may be the best protein available because it increases the production of thyroid stimulating hormone and thyroxin, two substances that may increase your body's metabolism. So if you're trying to cut down while maintaining lean mass, soya may be the best protein for you.(..)If fact a study by the University of Texas showed that both oestrogen and testosterone levels remained the same in males who used soya. Furthermore, dihydrotestosterone (DHT - a metabolite of testosterone that has been associated with enlarged prostates, acne and male balding) levels fell by 13%.
Więc czy daidzein może podnieść poziom testosteronu, można temu wierzyć?