Big Island-based microalgae producer Cyanotech Corp. said the presence of Vitamin K2 has been identified in one of its primary products, spirulina.

The company has sold spirulina for more than a decade as a food supplement rich in natural beta carotene and other nutrients, but said it recently received an independent contract laboratory analysis showing the product contains K2.
K2 is a form of Vitamin K, and is most known for properties aiding blood coagulation. Cyanotech said a 3-gram serving of spirulina has as much K2 as roughly 1 1/4 cup of romain lettuce, or about 19 percent of the recommended daily amount.