The Wandering Calcium

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Stina’s routine labs keep returning values that won’t sit still: a serum calcium that drifts high one month and low the next, a stubbornly low vitamin D, a parathyroid hormone(PTH): Raises blood calcium by stimulating bone resorption. that never quite matches the calcium it is supposed to control, and a cortisolA glucocorticoid involved in stress response, metabolism, and immune regulation. rhythm worn flat. Four endocrine findings, repeatedly shrugged off as perimenopause or coincidence.