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Insulin-like Growth Factor I (IGF-I) inhibits GH secretion by a negative loop at both hypothalamic and pituitary levels

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By the time most people reach their fifties, their average daily GH secretion is a fraction of what it was at twenty-five and with it, the downstream signalling that supports muscle maintenance, fat metabolism, and sleep architecture all shift accordingly

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Furthermore, magnesium deficiency can trigger cortical spreading depression (CSD), platelet aggregation, vasoconstriction, and substance P release