iHerb Quality Promise

At iHerb, authenticity is built into how we source products. We work directly with brands and authorized partners to bring genuine products to our customers — with no third-party sellers.

By sourcing straight from trusted suppliers, we help ensure product integrity and traceability from brand to customer — so you can trust that what you receive is authentic and responsibly sourced.

For supplements and sports products, brands are required to provide ingredient documentation, including Certificates of Analysis (COAs). These documents reflect brand testing designed to support ingredient authenticity, composition, and quality.

COAs may include testing for ingredient identity, label alignment, and the presence of certain contaminants, such as allergens or heavy metals, based on brand protocols. This documentation helps support ingredient accuracy and transparency across our assortment.

Products are handled in climate-controlled, certified facilities designed to help protect potency and product integrity. Our GMP-, ISO-, and NSF-certified fulfillment centers support careful storage and handling from the moment products arrive until they ship to customers.

This controlled environment helps reduce exposure to heat and other conditions that can impact product quality over time. We display exact expiration dates on product pages to give you clarity and confidence before purchase.

If a product doesn’t meet your expectations, we’ll make it right. We stand behind every purchase so you can shop with confidence.

View our return policy