: A standard maintenance dose is typically 2,000 FU (about 100 mg) per day. Some clinical research suggests higher doses (up to 10,800 FU) may be necessary for specific outcomes like reducing arterial plaque.

Several well-established brands have performed well in independent testing by ConsumerLab :

: Stop taking nattokinase at least two weeks before any scheduled surgery to prevent excessive bleeding.

: Known for offering higher FU counts (4,000 FU) per serving.

When purchasing nattokinase, the most critical factor is , measured in Fibrinolytic Units (FU) , rather than just milligrams (mg).

: Do not take nattokinase with prescription blood thinners (e.g., Warfarin, Eliquis, Aspirin) or blood pressure medications without consulting your doctor, as it can dangerously amplify their effects.

: It is best taken on an empty stomach , either first thing in the morning or before bedtime, to ensure the enzyme isn't broken down by digestive processes.

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