Vitamin D testing

Vitamin D deficiency is common in Canada, particularly during winter and at northern latitudes. Correcting a deficiency supports general and bone health; evidence that supplementation improves fertility outcomes on its own is limited. Health Canada provides intake recommendations, and your clinician can advise on testing and dose.

Also known as: 25-hydroxyvitamin D, vitamin D level

Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.