If one is deficient in Vitamin D on the blood test and takes Vitamin D for a limited amount of time, it is considered okay, however, if one continues to take Vitamin D without checking blood levels, that can lead to a lot of issues.

If one is deficient in Vitamin D on the blood test and takes Vitamin D for a limited amount of time, it is considered okay, however, if one continues to take Vitamin D without checking blood levels, that can lead to a lot of issues.