Maybe I'm misunderstanding your comment? You're comparing Vitamin D deficiency (< 50 nmol/L or 20 ng/ml) with severe Vitamin D deficiency (<30 nmol/L or 12 ng/m

Maybe I'm misunderstanding your comment? You're comparing Vitamin D deficiency (< 50 nmol/L or 20 ng/ml) with severe Vitamin D deficiency (<30 nmol/L or 12 ng/ml) and saying the numbers aren't consistent?