The 11 Fastest Vitamins and Supplements Ecommerce Sites
(August 2026) - real-user mobile speed from Google CrUX, 28-day window
| Rank | Brand | CWV | LCP | INP | CLS |
|---|---|---|---|---|---|
| 1 | Vitamin World | PASS | 1.4s | 121ms | 0.00 |
| 2 | Vitacost | PASS | 1.6s | 108ms | 0.00 |
| 3 | Vital Proteins | PASS | 1.6s | 179ms | 0.02 |
| 4 | Advocare | PASS | 1.7s | 155ms | 0.04 |
| 5 | PureFormulas | FAIL | 2.3s | 136ms | 0.53 |
| 6 | Holland & Barrett Retail Limited | FAIL | 2.3s | 250ms | 0.07 |
| 7 | Iherb, Inc. | FAIL | 2.5s | 380ms | 0.09 |
| 8 | Swanson | FAIL | 2.5s | 202ms | 0.00 |
| 9 | GNC | FAIL | 2.7s | 429ms | 0.20 |
| 10 | Vitamin Shoppe | FAIL | 3.9s | 221ms | 0.40 |
| 11 | Puritans NBTY | FAIL | 4.0s | 271ms | 0.03 |
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