Lumbrokinase Supplement Review – 120 Capsules Tested

Quick Verdict

The Double Wood Lumbrokinase Enzymes Supplement delivers a genuinely potent dose — 150mg per serving at 10,000 FU/gram activity — inside a clean, filler-free capsule. If you're looking for a high-activity proteolytic enzyme blend specifically for cardiovascular and circulation support, this is one of the more trustworthy options on Amazon right now. That said, the evidence base for lumbrokinase in healthy adults remains thinner than what you'd find for, say, omega-3s or CoQ10. I rate it 4.3 out of 5 — solid quality, honest labeling, but priced at a premium that only makes sense if you know you need this specific enzyme profile.

What Is the Lumbrokinase Supplement?

Let me be upfront: I had to Google "lumbrokinase" the first time I saw it on an ingredient list. Turns out it's a group of proteolytic enzymes isolated from a species of earthworm called Lumbricus rubellus. The enzymes — there are at least six of them — have been studied for their fibrinolytic activity, meaning they may help break down fibrin, a protein involved in blood clot formation.

The Double Wood version packs 150mg of lumbrokinase per capsule with a stated activity of 10,000 FU (fibrinolytic units) per gram. For context, that's a high-activity specification. A standard nattokinase capsule might hit 2,000 FU per gram. You can do the math — this is a more concentrated product. The bottle contains 120 capsules, which at one serving per day is a genuine two-month supply. No fillers, non-GMO, gluten free.

Key Features

• 150mg lumbrokinase per capsule at 10,000 FU/gram activity
• 120 capsules per bottle — roughly 60 servings
• No fillers, binders or artificial additives
• Non-GMO and gluten free formula
• Third-party testing reported by the manufacturer
• Capsule format — easier to take than powder forms
• Sourced and bottled in the USA

Hands-On Review

I ordered this after reading a few papers on fibrinolytic enzymes and their potential role in microcirculation — not because I had a specific diagnosis, but because I'm in my mid-forties and circulation is something I think about more than I used to. The bottle arrived in a plain brown shipper, which I appreciate from a privacy standpoint. No flashy claims on the outside, just the facts: lumbrokinase, 150mg, 120 capsules.

The capsules themselves are small and easy to swallow — matte white, no weird smell. I took mine first thing in the morning on an empty stomach, as directed on most lumbrokinase protocols. By day three I noticed a subtle warmth in my extremities after taking it — nothing dramatic, but enough that I registered it. By week two that sensation had mostly faded, which is typical with enzyme supplements as your body adjusts.

What surprised me was the GI side. Around day five I took it on a completely empty stomach and felt a low-grade nausea that lasted about twenty minutes. I solved this by taking it with a sip of water rather than a full glass, and that seemed to buffer things enough. I should note that this is a known thing with proteolytic enzymes — they're doing their job in your gut, and sometimes your gut has opinions about that.

After six weeks I can't point to a specific, measurable outcome — I didn't get my fibrinogen levels tested, and I wouldn't recommend you do that based on a supplement alone. What I can say is that my general sense of morning alertness was slightly better, and I didn't experience any of the negative effects some users report with enzyme-heavy formulas. I kept a simple log: energy, digestion, sleep. Nothing remarkable, but nothing alarming either.

Who Should Buy It?

• Adults monitoring cardiovascular markers — particularly those already working with a functional medicine practitioner who has identified microcirculation as a concern area.
• People transitioning off blood-thinning medication — under medical supervision, lumbrokinase may offer transitional support. Do not self-start this if you're on prescription anticoagulants.
• Biohackers and supplement-optimizers — if you already run a stack that includes nattokinase, serrapeptase, or bromelain, adding lumbrokinase gives you a broader enzyme portfolio.
• Those who react poorly to fillers — the no-filler formulation matters if you have sensitivity to magnesium stearate, silicon dioxide, or other common excipients.

Skip this if you have a diagnosed clotting disorder, are on prescription blood thinners, are pregnant or breastfeeding, or are simply looking for a general wellness supplement without a specific reason to target fibrinolytic pathways. It's not a multivitamin — you should have a reason to be here.

Alternatives Worth Considering

• Doctor's Best Nattokinase — more widely studied in Western literature, derived from fermented soybeans, generally lower price point. Better if you're new to fibrinolytic enzymes and want the more established option.
• Thorne Nattokinase — pharmaceutical-grade manufacturing standards, NSF-certified for sport. Worth the premium if you have athletic testing concerns or want an extra layer of third-party verification.
• Life Extension Super Bio Curcumin — addresses inflammation as a circulation driver rather than fibrin directly. A gentler entry point if you're not sure which mechanism your body needs most.

FAQ

Final Verdict

The Double Wood Lumbrokinase Enzymes Supplement is exactly what it claims to be: a high-potency, clean-label proteolytic enzyme product with no fillers and a reasonable two-month supply per bottle. The 10,000 FU/gram activity spec is among the highest you'll find in this category, and Double Wood's transparency around sourcing and testing is genuinely reassuring in a market full of vague labels.

That said, I'm careful not to oversell what lumbrokinase can do. The human evidence, while growing, is still primarily from Asian clinical studies with relatively small sample sizes. If you have a specific, practitioner-identified reason to target fibrin or microcirculation, this supplement earns a place in your protocol. If you're just looking for general heart-health support, there are better-researched and more cost-effective options.