PT141 is a copy of a hormone which has an effect on the nervous system called alpha-melanocyte-stimulating hormone.

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Anabolic steroids promote the growth of many tissues in the body by stimulating the release of the hormone testoterone.

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The hypothalamus reacts to ghrelin, a hormone excreted by an empty stomach, by releasing appetite-stimulating neurotransmitters into other parts of the brain.

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