Does serrapeptase work as a supplement? What the research says

Short answer: the evidence that serrapeptase works as an over-the-counter supplement is weak. A systematic review of the published research concluded that the evidence was insufficient to support its use as a pain reliever or health supplement, and that long-term safety data were lacking. Serrapeptase (also spelled serratiopeptidase) is a real enzyme that has been studied, mostly in clinical settings and in small trials. A capsule on a sales page with no printed amount is a different thing. This article is general information, not medical advice.

Below: what serrapeptase is, what the reviews found, why the capsule coating and the unit on the label matter, and how products in our reviews print it.

What is serrapeptase?

Serrapeptase is a proteolytic enzyme, which means it breaks down proteins. Research papers usually call it serratiopeptidase. A 2013 systematic review describes it as an enzyme prescribed in surgery, orthopaedics, dentistry and other specialities for anti-inflammatory, anti-swelling and pain-relieving effects. The same paper notes that it is also being promoted as a health supplement, including for heart and circulation, and that despite wide use there are few published studies of how well it works.

Supplement pages often repeat a short origin story: an enzyme with roots in the silk industry that "dissolves" trouble. A story is not a dose and not a trial. The questions that matter are how much enzyme is in the capsule, in what unit, whether it survives digestion, and what human studies show.

Does serrapeptase work as a supplement?

The 2013 review in the International Journal of Surgery found 24 clinical studies that met its inclusion criteria. Its authors judged that the evidence for pain and swelling relief came from studies of poor methodology, with few randomized trials, small samples, and in some cases no stated dose or duration. Its conclusion was that the existing evidence was insufficient to support use as an analgesic or health supplement, and that data on long-term safety were lacking.

Newer, narrower reviews show what "some evidence" looks like. A 2018 meta-analysis of five studies looked at serratiopeptidase after surgical removal of impacted molars. It found improved jaw opening (trismus) compared with corticosteroids, no significant difference in swelling, and too few studies for firm conclusions about other outcomes. That is a dental surgery setting, not a joint or circulation claim.

A 2020 Cochrane review of treatments for breast engorgement during breastfeeding included one small trial of serrapeptase with 59 women. It reported that serrapeptase may reduce the risk of engorgement compared with placebo, graded low-certainty, and that the reviewers were uncertain whether it reduces breast pain or swelling. No adverse events were reported in that trial's groups.

Put together: a few small trials in specific situations, low certainty, and no solid trial behind the claims many supplement pages make for joints, sinuses, arteries or scar tissue.

What does an enteric coating have to do with it?

Enzymes are proteins, and the stomach is acidic. That is why a coating that survives stomach acid is a real formulation question, and why some supplement pages advertise "enteric coated" capsules. A 2021 formulation study of serratiopeptidase tablets states that the coating's purpose was to protect the tablets from the acidic environment in the stomach, and its tests showed the coated tablets restricted release in simulated stomach fluid at pH 1.2 while releasing more in simulated intestinal fluid.

That is a lab study of one tablet formula. It does not tell you whether a given capsule on the market is coated, how well it works, or whether the enzyme reaches the blood in an active form. It does tell you what to look for: a plain capsule with no mention of a coating and no activity figure gives you nothing to check.

Why does the unit on the label matter (mg vs. SPU)?

Enzymes are measured by activity, not only by weight. Serrapeptase doses are often written in SPU, an activity unit, instead of milligrams. Our Serrasoothe review notes that clinical serrapeptase trials commonly use about 10 to 60 mg a day, which it puts at roughly 20,000 to 120,000 SPU. Two products with the same milligrams can differ in activity, and two products with the same SPU can differ in milligrams.

The same issue appears with other proteolytic enzymes. The Lymph Tonic review flags that nattokinase is listed as 2,000 FU and bromelain as 2,400 GDU, activity units that are not tied to a stated serving. A unit helps only if the page says how much you get per dose.

What the label gives you	Can you compare it with a study?
Enzyme name only	No
Milligrams, no activity	Partly, but activity can differ
Activity units (SPU, FU, GDU), no serving size	No
Activity units per serving, plus coating stated	Yes, as far as the studies allow

How do products in our reviews print serrapeptase and other enzymes?

Serrasoothe is the clearest example. It is a once-daily capsule that names six ingredients: serrapeptase, papain, bromelain, devil's claw, ginger and willow bark. Not one has an amount on the sales page, and no Supplement Facts panel is shown. Our review also found that the page promises a 180-day guarantee while the ClickBank order form states 60 days, so we use 60.

The Pulmo Balance review shows bromelain, another proteolytic enzyme, listed with no amount. In the NanoDefense Pro review, serratiopeptidase appears on the printed label of a nail and skin liquid but not in the page's headline ingredient list, and again with no amount. These are label observations, not statements about whether any product works or does not.

The wider joint category and energy and wellness category contain more formulas that lean on enzymes without stating doses.

What protection do you have as a buyer?

Very little is checked before a supplement reaches you. The FDA states that, under the law that governs dietary supplements, it does not have the authority to approve them before they are marketed, and that a firm generally does not have to give the FDA the evidence it relies on to substantiate safety. In other words, a page saying "clinically studied enzyme" is the seller's description, not a regulator's finding.

That is why we read the claim against the research. If a page says an enzyme "dissolves" scar tissue, clears arteries or "digests" inflammation, ask which human trial showed that for this dose. The reviews above did not find one that supports those broad claims. A good seller can answer with a study citation, a dose per capsule and a coating statement. A weak one answers with another testimonial.

A checklist for any enzyme supplement

1. Find the Supplement Facts panel and the amount per serving, with the unit.
2. If the unit is SPU, FU or GDU, check that it is per capsule or per serving.
3. Look for a coating claim (enteric or delayed release), and treat a missing claim as unknown.
4. Ask what human trial matches the product, the dose and the condition, not the enzyme in general.
5. Watch for claims about "dissolving" tissue, arteries or scars. Those go beyond what the reviews above support.
6. Check the refund on the order form, and keep your order number.
7. Ask a doctor or pharmacist, especially before surgery or if you take blood thinners or other medicine.

FAQ

What is serrapeptase used for?

In published research it has been studied for pain and swelling after dental surgery, breast engorgement and other settings, mostly in small trials. Supplement pages claim much more, and the 2013 review found the evidence insufficient for use as a pain reliever or health supplement.

Is serrapeptase the same as serratiopeptidase?

Yes, they are two names for the same enzyme. Medical papers tend to use serratiopeptidase, and supplement sellers tend to use serrapeptase.

Does serrapeptase need an enteric coating?

A 2021 formulation study used enteric coating to protect the tablets from stomach acid. Whether an uncoated capsule works as well is not something we could confirm, so ask the seller for the facts.

Is serrapeptase safe to take every day?

The 2013 review says long-term safety data are lacking. The Cochrane trial found no adverse events in a short setting with 59 women. Ask a doctor or pharmacist before daily use, especially if you take medicine or have surgery planned.