Natren
Last verified: April 2026
Read our full verification: Is Natren Made in USA?Verification Summary
American Score
Manufacturing Location
Westlake Village, CA
Headquarters
Westlake Village, CA
Founded
1982
Products Verified
2 products
Evidence Breakdown
Factory Location Specificity
Specific factory city identified
Website Claim
Brand website explicitly claims Made in USA
Manufacturing History
Established USA manufacturer
Known Overseas Production
No known overseas production
Verification Notes
Natren probiotics manufactured in Westlake Village, CA. Website confirms made in USA. Probiotic supplements produced at their California facility since 1982.
Last verified: April 2026
Manufacturing Profile
Natren manufactures at a specific factory location in Westlake Village, CA. Founded in 1982 (44 years of documented domestic manufacturing). Our 2 verified Natren listings sit in health & personal care.
Verification tier
91% average
High — strong brand-level and product-level evidence
Factory evidence
Specific city
Westlake Village, CA
Catalog breadth
2 products
1 category
Natren has been manufacturing products in Westlake Village, CA since 1982. We carry 2 verified American-made Natren products.
Heritage & History
Natren was founded in 1982 in Westlake Village, California by Natasha Trenev, a pioneering probiotic researcher who brought pharmaceutical manufacturing standards to the probiotic supplement category at a time when the field was barely recognized by mainstream nutrition science.
Trenev's work on probiotic culture viability and potency guarantees set standards that the broader industry subsequently adopted. Natren's insistence on documenting live culture counts through expiration — and guaranteeing those counts — distinguished the brand in an industry where vague potency claims were common. The California manufacturing facility has produced Natren probiotics for over four decades.
Made in California
Natren manufactures its probiotic supplements in Westlake Village, California, where the company grows its proprietary cultures and produces the final supplement products. The manufacturing process is designed to protect culture viability through packaging and distribution, maintaining the documented potency levels guaranteed on each product.
The California facility produces the full Natren line including Healthy Trinity, Megadophilus, Bifido Factor, and Digesta-Lac — single-strain and multi-strain probiotics formulated for adults, children, and specific digestive support needs. Over 40 years of American probiotic manufacturing in California, from a company that helped create the category.
Frequently Asked Questions
Is Natren made in the USA?
Yes. Natren manufactures 2 verified products in Westlake Village, CA. Natren manufactures pharmaceutical-grade probiotic supplements in Westlake Village, California since 1982, producing American-made probiotics with documented potency guarantees using proprietary cultures grown and manufactured at their California facility.
Where is Natren manufactured?
Natren is headquartered in Westlake Village, CA. Manufacturing takes place in Westlake Village, CA.
What Natren products can I buy?
We carry 2 verified Natren products across Health & Personal Care. Every listing links directly to Amazon with verified American manufacturing.
When was Natren founded?
Natren was founded in 1982. Natren manufactures pharmaceutical-grade probiotic supplements in Westlake Village, California since 1982, producing American-made probiotics with documented potency guarantees using proprietary cultures grown and manufactured at their California facility.
Does Natren ship from Amazon?
Yes, all Natren products listed here are available on Amazon with free shipping for Prime members.