Analyte | Gravimetrically Weighted Value | Units | Stability (Days) |
---|---|---|---|
25-Hydroxy Vitamin D2 (25-OH-D2) | 30 | ng/mL | 25 days |
25-Hydroxy Vitamin D3 (25-OH-D3) | 30 | 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.