Source Naturals NSK-SD Nattokinase, Systemic Enzyme for Healthy Circulation* 100mg - 60 Vegan Capsules

Easy to swallow capsule, no after-taste. Seems to work well has, I believe, to slow my tachycardia somewhat after a month's usage with no stomach upset.

Excellent product—repeat customer!

I bought this for my husband who has a bit of calcium build-up in a major arterial valve. He is hoping this helps decrease or slow future build-up. He took this for the entire bottle. It did not upset his stomach in any way. I will purchase more for his daily use.

10,000 units Nattokinase tends to lower heart rate like a mild beta blocker. If I take it at least 90 minutes before exercise it makes it more difficult to get my heart rate up to 90% of max heart rate for my HIIT training. This product also has this effect on me.

Great product for the circulatory system.

Watch on You tube: Nattokinase We Tested Them All. This one actually contains what it says it does. Others that look quality, aren't.

I will never underestimate my body’s need for proper enzymes. Good for my heart, good for my circulation, good for my well-being. Nattokinase capsules, because, I don’t really like the taste of natto.

Good supplement!