The vitamin D serum level should be checked every year, preferably in March or April when levels are lowest, from there, you can target intake to keep your blood levels in the 40-60 [ng/mL] range. Carole Baggerly More Quotes by Carole Baggerly More Quotes From Carole Baggerly Nearly 40 percent to 75 percent of the world's population is vitamin D deficient, the deficiency and disease that follow do not need to exist. GrassrootsHealth was founded to eradicate the vitamin D deficiency epidemic. Carole Baggerly health
