also known as Calcium/Phosphate parathyroid-challenge test in Serum
| # | Retailer | Lab | Seen | Price | |
|---|---|---|---|---|---|
| 1 | Walk-In Labcheapest via LabCorp,Quest · seen today | LabCorp,Quest | today | $75 | order → |
| 2 | Personalabs via Quest · seen today | Quest | today | $442 | order → |
| Vitamin B12 | 16 retailers | $10 |
| Magnesium RBC Test | 14 retailers | $8 |
| Ferritin | 14 retailers | $9 |
| Calcium, Ionized | 14 retailers | $18 |
| Iodine Test | 13 retailers | $30 |
| Selenium | 12 retailers | $12 |
| Iron Test | 11 retailers | $13 |
| Zinc, Blood Test | 11 retailers | $11 |