Dietary Fat-Carbohydrate Balance Does Not Affect Growth Hormone Levels

Growth hormone helps regulate fat metabolism. Many people take human growth hormone injections because they trigger fat loss. Can we alter natural growth hormone release by manipulating the composition of the diet? A study led by Hiroto Sasaki from Ritsumeikan University in Shiga, Japan found that three-day diets high in fat and low in carbohydrate, or low in fat and high in carbohydrate, had similar effects on growth hormone levels in healthy men. At the end of each three-day diet, the men rode a stationary bike for 30 minutes at 60 percent of maximum effort. Fat use was higher after exercise when the men had consumed a high-fat, low-carbohydrate diet, but these changes were temporary. Short-term diet modifications have no effect on growth hormone levels in blood. (Growth Hormone & IGF Research, 25: 304-311, 2015)

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