From: Prevalence and risk factors of vitamin D deficiency in inherited ichthyosis: A French prospective observational study performed in a reference center
VitD status
25(OH)D status(ng/ml)
Optimal
x ≥ 30
Sufficiency
20 ≤ x < 30
Insufficiency
10 ≤ x < 20
Deficiency
x < 10