Reconsidering vitamin D optimal values based on parathyroid hormone levels in a North Algerian cohort: stratification by gender and season

Comment on: Association between serum vitamin D levels and age in patients with epilepsy: A retrospective study from an epilepsy center in Saudi Arabia

“… 2 Based on these factors, numerous populations-specific CV of serum VD levels have been formulated to be applied clinically and in research institutions. 3 , 4 Saudi Arabia is among the countries that have generated their CV of serum VD levels and the recommended value for determining VD status and bone health was set at 30.0 nmol/L. 5 In the study methodology, Alhaidari et al 1 mentioned that serum VD level was grouped into normal (≥75 nmol/L) and low (<75 nmol/L).…”