Metabolite '658 Patent's Claim 13
 

From Patent '658 

Claim 13: A method for detecting a deficiency of cobalamin or folate in warm-blooded animals comprising the steps of: 

assaying a body fluid for an elevated level of total homocysteine; and    

correlating an elevated level of total homocysteine in said body fluid with a deficiency of cobalamin or folate.