Analyte Gravimetrically Weighted Value Units Reconstituted
Stability (Days)
25-Hydroxy Vitamin D2 (25-OH-D2) 10 ng/mL 25 days
25-Hydroxy Vitamin D3 (25-OH-D3) 10 ng/mL 25 days

Product Contains: 25‑Hydroxy Vitamin D2 (25‑OH‑D2), 25‑Hydroxy Vitamin D3 (25‑OH‑D3)

Matrix Serum
Unit Size 5x5mL
Form Lyophilized
Shelf Life 30 months
Stability 25 days
Storage Store dried control material at 2-8ºC (35-46ºF).


There are two types of Vitamin D. Vitamin D2 (ergocalciferol) is obtained from food. It is metabolized by liver to its active form 25 hydroxycalciferol [25 OHD2]. Vitamin D3 (cholecalciferol) is synthesized in skin by sunlight's UV rays. It is metabolized by liver to 25 dihydroxycalciferol [25 OH D3] is involved in many biochemical functions including calcium and bone metabolism regulation. Vitamin D deficiency is associated with Ricketts, osteomalacia, depression and impaired cognitive function. Elevated Vitamin D levels decrease depression. High-dose vitamin D3 is also used to prolong remission intervals in multiple sclerosis (MS) patients.


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