| 01 | USP Verified | 75.4 |
| 02 | NSF Certified for Sport | 50.0 |
| 03 | NSF Certified | 49.2 |
| 04 | Thorne | 44.4 |
| 05 | ConsumerLab | 42.2 |
| 06 | NSF International | 35.3 |
| 07 | Vitamin D | 35.3 |
| 08 | Pure Encapsulations | 33.6 |
| 09 | Nature Made D3 | 32.6 |
| 10 | USP | 32.4 |
| 11 | Kirkland Signature | 29.7 |
| 12 | NOW Foods | 27.1 |
| 13 | Nordic Naturals | 26.8 |
| 14 | Garden of Life | 25.9 |
| 15 | ConsumerLab certification | 25.6 |
| 16 | ConsumerLab testing | 24.1 |
| 17 | Prenatal vitamin with folic acid | 23.1 |
| 18 | B9 (folate) | 22.2 |
| 19 | B12 | 21.5 |
| 20 | metformin | 21.0 |
| 21 | acid-suppressing drugs | 20.5 |
| 22 | iron | 19.7 |
| 23 | A basic multivitamin | 19.4 |
| 24 | Vitamin A | 19.1 |
| 25 | B6 | 18.8 |
| 26 | B3 | 18.6 |
| 27 | zinc | 18.4 |
| 28 | USP-verified products | 18.2 |
| 29 | Eurofins | 18.1 |
| 30 | NSF-verified product | 18.0 |