Vitamin Tidbit of the Day

Riboflavin should not be taken with copper, zinc, iron, and manganese.  These metals form chelates with riboflavin and prevent absorption.

Riboflavin is found in many b-complexes.  So don't take your b-complex close to your iron supplement.

(Source The A.S.P.E.N. Nutrition Support Core Curriculum, pg 138)