The Vitamin B3 Niacin Plasma lab test measures niacin in blood to check for low or high levels. Processed by Quest Diagnostics Draw Locations Turnaround Time: 2-4 Business Days on Average. Time may
| # | Retailer | Lab | Seen | Price | |
|---|---|---|---|---|---|
| 1 | True Health Labs seen 1w ago | — | 1w ago | $229 | order → |
| Vitamin B12 | 15 retailers | $10 |
| Iodine Test | 14 retailers | $30 |
| Magnesium RBC Test | 14 retailers | $8 |
| Ferritin | 14 retailers | $9 |
| Calcium, Ionized | 14 retailers | $18 |
| Selenium | 12 retailers | $12 |
| Iron Test | 11 retailers | $13 |
| Zinc, Blood Test | 11 retailers | $11 |