Klinefelter Syndrome

Klinefelter syndrome is a genetic condition in males caused by an extra X chromosome, which often means lower testosterone and a range of physical, developmental, and hormonal differences. Vitamin D and calcium are the supplements most often discussed, mainly for bone health, but little research on them in this condition has been reviewed here so far. Omega-3s, zinc, and magnesium come up too, and the evidence for them is limited.