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Your Trusted & Reliable Source for Premium Nutritional Ingredients

Your trusted supply of the building blocks of modern wellness to distributors, contract manufacturers, and brands since 2005.

20+

Years in business

140+

Ingredients Stocked

NSF

Certified Facility

U.S.

Nationwide Distribution

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CERTIFICATIONS & ACCREDITATIONS

Quality You Can Count On

Dongyu USI meets the highest industry standards for quality, safety, and ethical business practices.

Image by Maria Kovalets
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FEATURED PARTNERSHIP

Trusted Supplier of KoncepNutra™ L-Carnitine Products

Dongyu USI is a exclusive U.S. importer of KoncepNutra™ L-Carnitine — sourced directly from our sister manufacturing facility in China, one of the world's leading L-Carnitine producers.

See Our Full Product List

Explore our complete portfolio of nutritional ingredients, stocked in our Tustin, CA warehouse and sourced from trusted global manufacturers.

WHAT WE OFFER

Built to Support Every Stage of Your Supply Chain

Request a Sample

Samples available upon request with Certificate of Analysis and full product documentation included.

Product Sourcing

Need a different mesh size, density, or color? We source products to meet your exact specifications.

Manufacturer Technical Support

Direct technical support from the manufacturer on product information, GMP questions, and problem resolution.

Events & Industry News

Stay updated with the latest company news, industry insights, and upcoming events from Dongyu USI.

GET IN TOUCH

Start an Inquiry

Whether you need a sample, custom sourcing, or have a technical question — our team will get back to you promptly.

Toll Free:

1-888-580-0088

Main:

949-251-1768

Fax:

949-251-8865

Address:

14831 Franklin Ave, Tustin, CA 92780

Inquiry Type
PreferredSupplier-3D-R.webp

CERTIFICATIONS & ACCREDITATIONS

Quality You Can Count On

Dongyu USI meets the highest industry standards for quality, safety, and ethical business practices.

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