Experimental studies in which animals and humans receive supplements of __________ have been shown to increase muscle mass and bone density, reduce fat, and increase activity levels.

Question

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Experimental studies have shown that supplements of human growth hormone can increase muscle mass and bone density, reduce fat, and increase activity levels in both animals and humans. However, the use of human growth hormone as a supplement is controversial and is banned in many sports due to its potential health risks and ethical concerns.

Experimental Studies in Which Animals and Humans Receive Supplements of __________