Usage examples (13)

• The third tye of vitamin K, menadione, is not made in nature so is therefore manmade.
• One important exception to these toxicity results involves a synthetic form of vitamin K called menadione.
• Food and Drug Administration (FDA) does not allow vitamin K to be sold as a dietary supplement in its menadione form.
• While this form of vitamin K can sometimes be converted by the body into non-toxic forms, research studies have shown unwanted risk stemming from intake of menadione.