Answer:pituitary
Explanation: the hypothalamus makes the pituitary gland release hormones(estrogen and testosterone) into the body. Thyroid is metabolism, adrenal is Adrenalin, and the reproductive glands are the first things that change when the pituitary glands release hormones
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Hmm I don't know in what way you're referring to, but something called yo-yo dieting<span> or the </span>yo-yo<span> effect might be what you're looking for. It's when someone looses weight and then regains it back.
Hoping I helped!</span>
Eating proteins increases what your body needs to keep you healthy when you are lacking in amino acids it is useful to bet more protien in your system.