Is iHerb safer than Amazon for supplements?

Generally yes for supplement authenticity. iHerb buys directly from brands and has stricter supply chain controls. But Amazon is fine if you buy from the brand's official storefront.

Should I stop buying supplements from Amazon?

Not necessarily. Just buy smart. Use the brand's official Amazon store, check "Sold by" information, and avoid suspiciously cheap listings. Subscribe & Save from established sellers is generally fine.

SafetyModerate Evidence

47,000+ trials analyzed

59,000+ interactions

Not FDA evaluated

Are Supplements on Amazon Fake?

Quick Answer

Some are. Amazon's commingled inventory system means genuine and counterfeit products from different sellers can be stored together. In 2023, an estimated 3-5% of Amazon supplements were counterfeit or mislabeled. Buy "Sold by" the brand directly or from Amazon itself, not random third-party sellers.

Key Points

3-5% of Amazon supplements estimated counterfeit or mislabeled
Commingled inventory pools stock from different sellers
Buy "Sold by" the brand or Amazon directly
Some brands pulled off Amazon due to counterfeiting
Direct-from-brand websites are the safest option

Detailed Answer

THE REAL PROBLEM: COMMINGLED INVENTORY

Amazon uses a system called "commingled inventory" or "Stickerless Commingled Inventory." When multiple sellers list the same product, Amazon may pool their stock into one bin. So even if you buy from a reputable seller, you might get a unit that was shipped in by someone else.

RED FLAGS ON AMAZON SUPPLEMENTS:

1. Price too good to be true (50%+ below retail) 2. Seller name you've never heard of 3. Review manipulation (thousands of 5-star reviews within days of listing) 4. Packaging differences from the brand's official site 5. "Ships from Amazon, Sold by [random seller]"

HOW TO BUY SAFELY ON AMAZON:

1. Buy "Ships from and sold by Amazon.com" when possible 2. Or buy directly from the brand's official Amazon storefront 3. Check the brand's website for an "Authorized Retailers" list 4. Compare packaging to the brand's official photos 5. Use Subscribe & Save from established sellers (less likely to be counterfeit)

BRANDS THAT HAVE CONFIRMED COUNTERFEITING ISSUES:

Several major supplement brands have publicly warned about Amazon counterfeits. Some (like Athletic Greens/AG1) pulled off Amazon entirely to control distribution.

SAFER ALTERNATIVES:

Buying directly from the brand's website or from retailers like iHerb, Thorne.com, or Vitacost gives you more supply chain certainty. You might pay slightly more, but you know it's real.

Evidence Quality

Moderate Evidence

Some quality studies, more research helpful

Key Sources:

reviewAmazon Project Zero: Counterfeit Prevention Program
reviewGAO Report on Online Supplement Sales

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Are Supplements Safe Are Supplements Fda Regulated

About this information: Our recommendations draw from peer-reviewed clinical trials, systematic reviews, and the same medical databases your doctor uses. These statements have not been evaluated by the FDA. Supplements are not intended to diagnose, treat, cure, or prevent any disease.

Moderate Evidence

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