Nattokinase Supplements Comparison

#1 Top Pick

Research Verified Nattokinase

If you want to try a powerful, research-backed Nattokinase supplement, then Research Verified should be your first choice. It contains the ideal dosage of 4000 FU per daily serving, conveniently split into 2 capsules. It doesn’t have any Vitamin K2 but it does contain BioPerine® to boost nutrient absorption.

Quality:

Research Verified clearly has a commitment to quality and guarantees its supplements are made in an FDA-registered laboratory that is cGMP certified. Their product contains top-quality ingredients to deliver essential nutrients to the body.

Reputation:

Their reputation is top notch. They’re an established company that offers excellent customer service, safe checkout and on-time delivery. Furthermore, they have several third-party monitoring services, including buySAFE, Norton, and Trustee, as well as an A+ rating from the quality monitoring company QualityTrusted.

Guarantee:

All purchases of Research Verified Nattokinase are backed by a 365-Day Risk-Free 100% Money-Back Guarantee (when buying from an authorized seller). That is the best guarantee that we have seen from any manufacturer. This 1-year guarantee shows how confident Research Verified is in the effectiveness of their Nattokinase product.

#2 Pick

Klair Labs Nattokinase NSK-SD

Klair Labs Nattokinase NSK-SD Klaire Labs, now transitioning to the SFI Health brand, offers a Nattokinase supplement that delivers a solid dose of 4,000 FU per day using the clinically studied and patented NSK-SD®. This formula is split into two capsules for flexible dosing and has earned high customer ratings. While it meets many of the criteria we look for, including being GMP-certified and free from Vitamin K2, it lacks BioPerine® for enhanced absorption and only comes with a 30-day refund policy. Additionally, a past recall from the brand raises some concerns about product testing transparency.

#3 Pick

Allergy Research Group Nattokinase

Allergy Research Group brings over four decades of industry experience to its Nattokinase supplement, which contains the well-researched NSK-SD® at a daily dose of 4,000 FU. It comes with a 60-day satisfaction guarantee and delivers a comparable dosage. However, it differs in several ways that could impact its value. The formula comes in softgels, introducing extra ingredients not typically found in capsules, and it lacks BioPerine® to aid absorption. While the company advertises the Nattokinase as vegan-derived, the product itself includes animal-derived ingredients and is not suitable for vegans. Despite some user-reported side effects, most reviews are positive, suggesting it works well for many people.