Best online stores for supplements and health in the US
35 buying questions · the United States · 2 assistants
| # | Store | Named | Recommended |
|---|---|---|---|
| 1 |
Thorne thorne.com |
20 / 35 +20 | 11 |
| 2 |
The Vitamin Shoppe vitaminshoppe.com |
23 / 35 +23 | 9 |
| 3 |
Life Extension lifeextension.com |
10 / 35 +10 | 4 |
| 4 |
Pure Encapsulations pureencapsulations.com |
8 / 35 +8 | 4 |
| 5 |
Pure Encapsulations pureencapsulationspro.com |
8 / 35 +8 | 4 |
| 6 |
GNC gnc.com |
10 / 35 +10 | 3 |
| 7 |
nordicnaturals.com nordicnaturals.com |
6 / 35 +6 | 3 |
| 8 |
Transparent Labs transparentlabs.com |
3 / 35 +3 | 3 |
| 9 |
PureFormulas pureformulas.com |
9 / 35 +9 | 2 |
| 10 |
gardenoflife.com gardenoflife.com |
4 / 35 +4 | 2 |
| 11 |
nowfoods.com nowfoods.com |
8 / 35 +8 | 1 |
| 12 |
Nature Made naturemade.com |
4 / 35 +4 | 1 |
| 13 |
Optimum Nutrition optimumnutrition.com |
3 / 35 +3 | 1 |
| 14 |
Legion legionathletics.com |
2 / 35 +2 | 1 |
| 15 |
Needed needed.com |
2 / 35 +2 | 1 |
| 16 |
Ritual ritual.com |
2 / 35 +2 | 1 |
| 17 |
Sports Research sportsresearch.com |
2 / 35 +2 | 1 |
| 18 |
Culturelle culturelle.com |
1 / 35 +1 | 1 |
| 19 |
Dymatize dymatize.com |
1 / 35 +1 | 1 |
| 20 |
Florastor florastor.com |
1 / 35 +1 | 1 |
| 21 |
Kaged kaged.com |
1 / 35 +1 | 1 |
| 22 |
Naked Nutrition nakednutrition.com |
1 / 35 +1 | 1 |
| 23 |
Seed seed.com |
1 / 35 +1 | 1 |
| 24 |
Visbiome visbiome.com |
1 / 35 +1 | 1 |
| 25 |
luckyvitamin.com luckyvitamin.com |
1 / 35 +1 | 0 |
| 26 |
Vital Proteins vitalproteins.com |
1 / 35 +1 | 0 |
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Category median: named in 0 of 35 questions (the middle store of all 86 stores we measured; +n is how many questions a store is above it).
Named means the store appeared in the answer. Recommended means the assistant clearly advised it. Being in a list is not the same as being advised, so we count them separately. The other 60 stores were named in none of these questions.
This ranking covers the 86 stores we measure in this category. That is not every store in the market.
The top 10, real questions with who AI named, the sites AI cites and how it describes #1. Free, by email.
Named is not recommended
Each dot is a store. Further right: named in more buying questions. Higher: recommended more often. Stores low on the right are known to AI but rarely the tip. That gap is what most stores can close.
Where AI sends shoppers
Review sites, comparison sites, marketplaces and communities that ChatGPT and Gemini mention in their answers in this category. Stores that are present and well reviewed there are easier for AI to recommend.
| Amazon Marketplace |
58 of 70 | AI sends shoppers there. Selling there too, or being clearly better on your own site, both help. |
| Fullscript Platform |
11 of 70 | AI sends shoppers there. Check whether you can be listed. |
| Walmart.com Platform |
5 of 70 | AI sends shoppers there. Check whether you can be listed. |
| eBay Platform |
5 of 70 | AI sends shoppers there. Check whether you can be listed. |
| DoorDash Platform |
3 of 70 | AI sends shoppers there. Check whether you can be listed. |
| Instacart Platform |
3 of 70 | AI sends shoppers there. Check whether you can be listed. |
| Reddit Community |
2 of 70 | Be present there with useful posts or answers; AI repeats what people say. |
| Trustpilot Review site |
2 of 70 | Collect reviews there: AI quotes them as proof that a store can be trusted. |
The questions we asked
Only the questions that could really name a store, because only those count. They are in the language of the market, because that is how shoppers there ask them.
- I usually buy supplements from big general retailers but which specialized American supplement website should I try instead?
AI named: iHerb, Life Extension, Thorne - besides large general American online stores where else can I buy quality vitamins online in the US?
AI named: Amazon, Walmart, Target - what is the best US online store to buy dietary supplements from?
AI named: iHerb, Thorne, Pure Encapsulations - where can I buy cheap protein supplements online in America?
AI named: MyProtein, BulkSupplements.com, Walmart.com - where can I buy health supplements online in the United States?
AI named: Thorne, Pure Encapsulations, Nature Made - where can I buy pre-workout supplements online in the US and return them if I don't like them?
AI named: Legion Athletics, GNC, Transparent Labs - where can I buy supplements online in America that are specifically made for women?
AI named: iHerb, Vitacost, The Vitamin Shoppe - where can I buy third party tested supplements from a trustworthy US website?
AI named: Thorne, Life Extension, Costco - where can I find a trustworthy American online store for probiotics?
AI named: Culturelle, Align, Florastor - where can I find the cheapest nootropics online in the United States?
AI named: Costco, Sam’s Club, iHerb - where do most Americans buy their daily vitamins online?
AI named: Amazon, Walmart.com, Ritual - where do people trust to buy magnesium supplements online in America?
AI named: CVS, Walgreens, Costco - where in the US can I buy bulk supplements at a discount?
AI named: BulkSupplements.com, PureBulk.com, NOW Foods - where in the US can I buy supplements online and get them delivered within two days?
AI named: Amazon, Walmart, Target - where is the best place to buy protein powder online in the US?
AI named: Costco, iHerb, Optimum Nutrition - where should seniors buy their vitamins and supplements online in the US?
AI named: Costco, CVS, Walgreens - which American online health store is known for selling authentic products?
AI named: iHerb, Vitacost, Kroger - which American online store for vitamins has the easiest return policy?
AI named: Costco, The Vitamin Shoppe, Vitacost - which American online store is best for buying supplements if you are just starting out with fitness?
AI named: iHerb, Thorne.com, Vitamin Shoppe - which American online store specializes in supplements for people who are vegan?
AI named: Vegan Essentials, Future Kind, Complement - which American supplement website gives you the best value for your money?
AI named: iHerb, Swanson Vitamins, Costco - which American supplement website has the most reliable stock for popular products?
AI named: iHerb, The Vitamin Shoppe, Vitacost - which American supplement website keeps the most products in stock?
AI named: iHerb, The Vitamin Shoppe, Swanson Vitamins - which American website do people recommend for buying creatine?
AI named: iHerb, Bodybuilding.com, Nutricost - which American website has a good reputation for selling fish oil and omega 3 supplements?
AI named: iHerb, Vitamin Shoppe, Vitacost - which American website should I use to buy vitamins and supplements?
AI named: iHerb, Thorne, Life Extension - which US online store for health supplements has the best shipping options?
AI named: The Vitamin Shoppe, iHerb, Vitacost - which US online store is reliable for buying collagen supplements?
AI named: iHerb, Costco.com, Target.com - which US online store sells vitamins and supplements at the lowest prices?
AI named: iHerb, Vitacost, Swanson Vitamins - which US supplement store has the best customer reviews?
AI named: iHerb, The Vitamin Shoppe, Vitacost - which US supplement website delivers the fastest?
AI named: Amazon, GNC, The Vitamin Shoppe - which US supplement website is best suited for professional athletes?
AI named: Momentous, Thorne, Klean Athlete - which US webshop has the best deals on multivitamins?
AI named: iHerb, Costco, Swanson Vitamins - which US webshop is known for selling high quality supplements?
AI named: iHerb, Thorne.com, LifeExtension.com - which smaller or specialized US supplement store is worth checking out instead of the big mainstream sites?
AI named: Nootropics Depot, PureBulk, LiftMode
How to read this
This is a snapshot
AI assistants change their answers. This list is what came out on the date measured, not a judgement about the stores. We measure again every month.
What is not in it
No paid positions. A store cannot buy its way in, and the order follows from the answers alone.
Why not every question counts
If someone asks about a brand or for general information, no store appears in the answer, not even the best one. Those questions are left out of the count. How we measure.
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