Tag: Nutrient history

While Danish biochemist Henrik Dam is credited with discovering 'koagulation vitamin' (vitamin K) in 1929, the distinction and identification of vitamin K2 came later through the work of American biochemist Edward Doisy and others. This exploration revealed that Vitamin K is not a single compound but a family of related fat-soluble molecules.

According to the Cleveland Clinic, four compounds were once classified as B vitamins, but over time, they were found not to be true vitamins. This explains the gap in the B-vitamin numbering system and answers the common question: **what is vitamin B4?** The term was historically used to refer to several compounds, most notably adenine and choline.