Third-party tested digestive enzymes: what the seals mean

"Third-party tested" on a digestive-enzyme label can mean a real independent lab checked the enzyme activity units on the panel, or it can mean a general purity screen that says nothing about enzyme potency at all. Neither is the same as GRAS status, and neither is FDA approval — dietary supplements don't get either before they reach a shelf.

Self-affirmed GRAS isn't third-party testing

DigeZyme's maker describes it as having self-affirmed GRAS (Generally Recognized As Safe) status in the United States. That's a real regulatory pathway, but it's a manufacturer's own safety conclusion, reached under FDA's GRAS framework — not an independent lab result, and not a separate FDA evaluation of the finished supplement it ends up in. Nothing about GRAS status confirms what's actually in a given bottle; it's a statement about the ingredient category, made by the company that sells it.

What "FDA approved" would actually require, and why it doesn't apply here

Dietary supplements, digestive enzymes included, aren't reviewed or approved by the FDA before they're sold — that premarket review applies to drugs, not this category. The FDA can act after the fact if a product is found unsafe or mislabeled, but no supplement carries FDA approval to begin with, so a label claiming it is inaccurate on its face. Third-party testing exists precisely because that premarket check doesn't: it's a voluntary, brand-paid arrangement with an independent lab, not a government requirement.

What the common seals actually check

Not all third-party seals check the same thing, and none of them is enzyme-specific:

Program	What it checks	What it doesn't check
NSF Certified for Sport	Screens for substances banned by major sports organizations; verifies label claims against contents	Doesn't independently set or verify enzyme activity-unit standards
Informed Choice / Informed Sport	Batch-tests for banned substances, aimed at competitive athletes	Same — a banned-substance screen, not an enzyme-potency audit
USP Verified	Confirms identity, strength (potency) and purity against USP's public quality standards, plus a manufacturing-site audit	Relatively few supplement brands carry it; absence doesn't mean a product failed, only that it wasn't submitted
A general "lab tested" or "purity tested" claim with no named program	Unverifiable without a specific report	Says nothing about what was tested, by whom, or against what standard

Why enzyme potency makes this harder to verify

As what is DigeZyme covers, enzyme amounts are measured in standardized activity units — DU for amylase, HUT for protease, LU or FIP for lipase, CU for cellulase, ALU for lactase — defined by Food Chemicals Codex (FCC) and US Pharmacopeia (USP) assay methods, not by weight. A meaningful certificate of analysis (COA) for a digestive-enzyme product should report results in those same units, matched against what the label states. A COA that only confirms a plain milligram weight, or checks for heavy metals and microbial contamination without touching enzyme activity, is a real test — just not one that tells you whether the enzyme actually works at the labeled strength.

"40,000 USP" and similar numbers on a label

Some enzyme labels, particularly for lipase, print a number like "40,000 USP units" directly on the front. That's USP in its first sense: the assay method the number was measured against, set by the US Pharmacopeia's published standards — not a claim that the product carries "USP Verified" certification. A brand can accurately use USP's unit system for potency without ever submitting to USP's separate verification program, and the two uses of the same three letters get confused often enough that it's worth checking which one a label is actually claiming.

What to ask for

A current, batch-specific certificate of analysis that reports the enzyme activity units printed on the label — not just a general purity or heavy-metals panel — is the most direct evidence a brand can provide. A brand unwilling to produce one on request is telling you something, regardless of what badges appear on the front of the bottle.

Questions people ask

Are digestive enzymes third-party tested?

Some are, some aren't, and the seals that exist check different things — a banned-substance screen (NSF Certified for Sport, Informed Choice) isn't the same as a potency verification (USP Verified). Ask for a batch-specific certificate of analysis that reports the enzyme's own activity units rather than relying on a badge alone.

Are digestive enzymes FDA approved?

No dietary supplement is FDA approved before it's sold — that review applies to drugs, not this category. A self-affirmed GRAS claim, which DigeZyme carries, is a separate thing again: a manufacturer's own safety conclusion, not an FDA evaluation of the finished product.

What does "40,000 USP lipase" mean?

It's a potency figure measured against the US Pharmacopeia's assay method for lipase activity — the standard unit system these enzymes are measured in, not a claim that the product holds USP's separate "USP Verified" certification. See what is DigeZyme for how each enzyme's activity units work.

How do I know if a digestive-enzyme product is actually tested?

Ask the brand for a current certificate of analysis and check whether it reports results in the enzyme's own activity units (DU, HUT, LU/FIP, CU, ALU), matched to the label — not just a general purity or contaminant screen. See how to choose a good digestive enzyme supplement for the fuller checklist.