The 11 Fastest Vitamins and Supplements Ecommerce Sites

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

Rank	Brand	CWV	LCP	INP	CLS
1	Vitacost	PASS	1.5s	130ms	0.00
2	Vitamin World	PASS	1.5s	119ms	0.00
3	Vital Proteins	PASS	1.6s	186ms	0.03
4	Advocare	PASS	1.8s	162ms	0.04
5	GNC	FAIL	2.4s	466ms	0.21
6	PureFormulas	FAIL	2.5s	139ms	0.46
7	Swanson	FAIL	2.6s	204ms	0.01
8	Holland & Barrett Retail Limited	FAIL	2.7s	221ms	0.07
9	Iherb, Inc.	FAIL	2.9s	363ms	0.12
10	Vitamin Shoppe	FAIL	3.8s	194ms	0.40
11	Puritans NBTY	FAIL	4.1s	269ms	0.03

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