The 11 Fastest Vitamins and Supplements Ecommerce Sites

(November 2026) - real-user mobile speed from Google CrUX, 28-day window

Rank	Brand	CWV	LCP	INP	CLS
1	Vitamin World	PASS	1.5s	114ms	0.00
2	Vitacost	PASS	1.5s	123ms	0.01
3	Vital Proteins	PASS	1.5s	186ms	0.02
4	Advocare	PASS	2.2s	162ms	0.04
5	Iherb, Inc.	FAIL	2.3s	326ms	0.17
6	PureFormulas	FAIL	2.4s	138ms	0.46
7	GNC	FAIL	2.4s	336ms	0.29
8	Holland & Barrett Retail Limited	FAIL	2.5s	262ms	0.08
9	Swanson	FAIL	2.7s	210ms	0.02
10	Vitamin Shoppe	FAIL	3.2s	201ms	0.36
11	Puritans NBTY	FAIL	3.9s	261ms	0.03

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