Хм, я вот на это ориентируюсь (как один из источников):Practically all people are sufficient at levels ≥50 nmol/L (≥20 ng/mL); the committee stated that 50 nmol/L is the serum 25(OH)D level that covers the needs of 97.5% of the population. Serum concentrations >125 nmol/L (>50 ng/mL) are associated with potential adverse effects [1] (Table 1).https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/