73 probiotic manufacturers in the United States have a GMP-certified facility (NSF/ANSI 455-2) or an Informed Manufacturer certified facility (top states: California 18, New Jersey 10, Florida 8); for 31 of them a USDA Organic certificate lists probiotic items, and 46 say on their own website that they make probiotics. USDA Organic item lists checked October 1, 2026; website claims checked October 16, 2026; certification data checked November 1, 2026.
Every company on this page has at least one manufacturing or packaging facility on a public registry we check (NSF/ANSI 455-2 or Informed Manufacturer), and either its USDA Organic certificate lists probiotic items or its own website says it makes probiotics; each listing says which. The certification and the USDA Organic item list come from public registries and were found there on the date shown. The item list covers organic products only, and it is the certifier’s record of what the operation handles, not a test of any product. A probiotics claim on a company’s website is the company’s own: we record it with a quote and the date we checked, and we have not verified it.
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First 50 of 73
Order: featured, listings with a website, then A–Z.
Compare probiotic manufacturers at a glance in the United States
The most common dosage forms in the listed scope of these 73 probiotic manufacturers in the United States are powders (58), capsules (55) and tablets (39).
73 of the 73 probiotic manufacturers in the United States list a company website.
First 25 of 73 probiotic manufacturers in the United States, in the same order as the list above. Source: the public listings of NSF, Informed Manufacturer and the USDA Organic Integrity Database, last checked November 1, 2026. How we verify
How are probiotics manufactured?
Producing the culture and making the finished supplement can happen at different facilities. Lallemand describes fermentation, freeze-drying and packaging at its probiotic plant. For a finished capsule or powder, ask who supplies the strain, who blends and fills it, and who releases the batch. Do not assume every contract manufacturer grows its own cultures. Request a process outline and responsibility for each step before comparing quotes.
CFU, or colony-forming units, indicate viable microorganisms. NIH notes that live counts can fall over time and recommends looking at counts through expiry, rather than only at manufacture. A larger CFU number alone does not establish a better product. Ask for strain identification, the counting method, and stability results supporting the labeled count for the finished product.
NIH explains that some probiotics require refrigeration and others can be stored at room temperature; follow the product’s instructions. Ask the manufacturer for the storage conditions behind its stability data, the proposed moisture barrier, and how shipping and warehouse conditions are handled. Do not assume a room-temperature ingredient remains stable in every finished formula or package.
There is no single shelf life for every supplement. FDA’s dietary supplement CGMP guidance says an expiration date is not required by that rule, but a date used on a label should have supporting data. Ask for stability evidence for your formula in the proposed packaging and storage conditions; a manufacturing date alone does not tell you how long the product will meet its specifications.
Sources checked . General buyer guidance; not a check of any listed company’s process.
Questions buyers ask
What should I ask a probiotic manufacturer?+
Ask which strains they work with and whether each is identified to the strain level, how they count live cultures (CFU) at manufacture and at the end of shelf life, whether the product needs refrigeration, and which packaging and desiccants they use to keep moisture out. MOQ and lead time vary by manufacturer, so get them in writing.
Do you verify that these companies make probiotics?+
No. A company is listed here when one of its facilities is on a public registry we check and either its USDA Organic certificate lists probiotic items or its own website says it makes probiotics. The USDA Organic item list is the certifier’s record of what the operation is certified to handle organically, as we found it in the USDA Organic Integrity Database on the date shown; it covers organic items only and is not a test of any product. A website claim is the company’s own statement: we keep the quote, the page and the date we checked. Each card says which applies. Confirm either with the manufacturer before you rely on it.
What should I ask for in a quote request?+
Ask for minimum order quantity, lead times, formulation options, testing and certificates of analysis, in writing. In detail: ask about minimum order quantity (MOQ) per SKU, lead time for a first run and for reorders, whether they offer stock formulas or custom formulation, who sources raw materials, what testing they run (identity, potency, microbiological, heavy metals) and whether you receive a certificate of analysis (COA) per batch, and whether they support the label claims you plan to make. Terms vary widely by manufacturer, so compare written answers rather than assumptions.
How do I verify a manufacturer’s GMP certification myself?+
Ask the manufacturer for their current certificate and the exact facility address it covers, then look that facility up on the certifier’s public listing (for NSF/ANSI 455, NSF’s online listings). Certificates apply to specific sites, so make sure the facility that will make your product is the one listed. Each profile here links to the public listing we checked and the date we checked it.
How are probiotics manufactured?+
Producing the culture and making the finished supplement can happen at different facilities. Lallemand describes fermentation, freeze-drying and packaging at its probiotic plant. For a finished capsule or powder, ask who supplies the strain, who blends and fills it, and who releases the batch. Do not assume every contract manufacturer grows its own cultures. Request a process outline and responsibility for each step before comparing quotes.
CFU at the end of shelf life+
CFU, or colony-forming units, indicate viable microorganisms. NIH notes that live counts can fall over time and recommends looking at counts through expiry, rather than only at manufacture. A larger CFU number alone does not establish a better product. Ask for strain identification, the counting method, and stability results supporting the labeled count for the finished product.
Storage, shipping and packaging+
NIH explains that some probiotics require refrigeration and others can be stored at room temperature; follow the product’s instructions. Ask the manufacturer for the storage conditions behind its stability data, the proposed moisture barrier, and how shipping and warehouse conditions are handled. Do not assume a room-temperature ingredient remains stable in every finished formula or package.
How is supplement shelf life established?+
There is no single shelf life for every supplement. FDA’s dietary supplement CGMP guidance says an expiration date is not required by that rule, but a date used on a label should have supporting data. Ask for stability evidence for your formula in the proposed packaging and storage conditions; a manufacturing date alone does not tell you how long the product will meet its specifications.