Parathyroid Hormone
links: Hormones reference: 4-20-2021
Parathyroid Hormone #
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Secreted by the parthyroid glands. 
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Keep it under 15 pg/mL. Those with MPB tend to have levels in the higher range. 
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It is secreted when serum Calcium levels are low, removing it from the bones (via stimulating osteoclast activity), via producing Lactic Acid. 
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Increases secretion of Aldosterone, via increasing calcium concentration in the cells of the adrenal zona glomerulosa (the area of the adrenal gland in which aldosterone is produced). I believe the inverse is true as well R. Parathyroid hormone and aldosterone interfere with mitochondrial energy production. 
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- When there is adequate calcium (obvious), vitamin D (from a diet perspective since Ca absorption), and magnesium in the diet, PTH is kept to a minimum.