Bajekal explains that certain groups appear more prone to deficiency than others.
“As magnesium deficiency and increased urinary magnesium excretion (losing magnesium through your urine) can occur in people with insulin resistance, women with PCOS may benefit from magnesium supplementation, as well as those with restless legs syndrome and the elderly," she noted.
But she warns it is difficult to assess your ‘magnesium status’ because most of it lives inside your cells or bones. Regardless, focus on getting your sources from food before turning to supplements.