Nattokinase is a specialized fibrinolytic enzyme for support of healthy circulation. The Japanese food natto (from which nattokinase is extracted) is very rich in vitamin K2 which, although it is an excellent form of vitamin K, is contraindicated with many medications prescribed to prevent blood clots. While many supplements may also contain some vitamin K, the nattokinase used in NATTO NSK MEGA (Nattokinase NSK-SD) is produced under a specific patented process that removes all the vitamin K, yielding only the purified enzyme.Suggested Use One vegetable capsule twice daily, or more, as directed by a health care professional. Take with 8-10 ounces of water, with or without food. Serving Size:1 Capsule Servings Per Container: 60 Amount Per Serving Nattokinase NSK-SD (20,000 FU/gm) 100 mg Other Ingredients: rice flour, hydroxypropyl methylcellulose, vegetable lubricant Warnings Not to be used by pregnant or lactating women. Contains: soy. Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing. Keep out of reach of children.