Protease (enzyme)

A protein-splitting enzyme — measured in activity units, not just milligrams

All articles checked for accuracy against the GB NHC Register and all sources have citations with verified links to their relevant studies.

Protease is an enzyme that cuts protein chains into shorter pieces. When used in supplements it’s measured by activity units, not just milligrams.

This article explains what protease enzymes are, why manufacturers report activity units, where supplement proteases come from and how WellsparQ uses them in its DigestEase Complex. It also summarises safety considerations and the regulatory reality around making functional claims for enzymes in supplements.

Ingredient Snapshot

What it is

A protein‑splitting enzyme that cuts long protein chains into smaller peptides and amino acids.

Where from

Microbial fermentation, commonly Aspergillus oryzae or Aspergillus niger.

Known for

Measured by laboratory activity units (eg HUT); declared to show enzyme activity rather than mass.

In WellsparQ

• DigestEase ComplexProtease 3 — 0.03 mg

Protease is not a nutrient in the ordinary sense — it is a tool. The word covers any enzyme that breaks the peptide bonds holding proteins together, cutting long protein chains into shorter peptides and, eventually, free amino acids ^¹. Our own digestive system runs on proteases (pepsin in the stomach; trypsin and chymotrypsin from the pancreas), and supplement blends add microbial proteases for the same chemistry. WellsparQ uses one such protease as a small, precisely specified part of a digestive-enzyme formula.

What a protease is, and why it is measured differently

An enzyme's usefulness is about activity, not weight. Two tenths of a milligram of a highly active protease can do more work than a much larger mass of a sluggish one — so enzymes are declared in activity units, defined by a standardised laboratory assay, rather than by milligrams alone ^¹. That is why the WellsparQ label pairs a tiny weight with an activity figure:

Source: WellsparQ Supplements Database. HUT stands for Hemoglobin Unit, Tyrosine base — an industry-standard measure of proteolytic activity, based on how much of the protein haemoglobin the enzyme digests under set conditions. Declaring "48 HUT" alongside the 0.03 mg is the honest way to state an enzyme: the milligram figure alone would be meaningless. The "3" and "4.5" in names like Protease 3 and Protease 4.5 refer to the pH at which that particular protease works best — a formulator's way of covering the different acidities found along the gut.

Where supplement proteases come from

The proteases used in supplements are typically produced by fermentation of fungi — most commonly Aspergillus oryzae and Aspergillus niger — which have a long history of use in food production (they are the moulds behind soy sauce, miso and koji) ^¹. Fungal-fermentation proteases are microbial, not animal-derived, which is what allows an enzyme blend to remain suitable for vegetarians and vegans — unlike the older animal-pancreas enzymes. Suitability follows the finished product's certification.

What proteases do, biologically

Protein digestion is a normal, well-described physiological process. Dietary protein is denatured by stomach acid, then cut by the body's own proteases into peptides and amino acids that the small intestine absorbs ^¹. In clinical medicine, enzyme-replacement therapy is used where the pancreas cannot supply enough of its own digestive enzymes — a condition called exocrine pancreatic insufficiency — and this is the setting in which supplemental digestive enzymes have their clearest, evidence-based medical role ^².

That last point needs careful framing. Enzyme replacement in a diagnosed medical deficiency is a clinical treatment, quite different from a small enzyme addition in a general food supplement taken by people with normal digestion. We describe the biochemistry and the recognised clinical use as facts about proteases, not as claims about what DigestEase does.

How WellsparQ uses it

In DigestEase Complex, protease sits alongside the formula's herbs (peppermint, fennel, ginger, caraway, chamomile) and, typically, other digestive enzymes. Its declared 48 HUT is a small, defined amount — a supporting, precisely specified component rather than a therapeutic enzyme dose. The value of stating both the weight and the activity unit is transparency: you can see not just that a protease is present, but how much enzyme activity it represents.

Safety and sensible use

Fungal-derived digestive enzymes are widely used and generally well tolerated; the main practical points are allergy-related. People with a known mould/fungal allergy should take care with Aspergillus-derived enzymes. As enzymes are proteins, anyone who has reacted to enzyme supplements before should avoid them. Anyone with a diagnosed digestive condition, or who is pregnant, breastfeeding or on medication, should ask a GP or pharmacist before using enzyme supplements — and should not use a general food supplement in place of prescribed enzyme-replacement therapy.

Where it fits

Protease is the quiet mechanic of a digestive-enzyme blend — declared properly, in activity units, at a small and honest amount. In DigestEase Complex it is one precisely specified part of a wider formula. Described for exactly what it is: an enzyme, measured the way enzymes should be. It's a lifestyle.