If you don’t eat well, have heavy menstrual periods, use oral contraceptives, etc., you likely need extra iron and/or vitamin B6. Try a B-complex containing from 10-100 mg of vitamin B6, and 10-100 mcg of vitamin B12.
As a scientist, I know a huge amount of useful and interesting nutrition research that the public is unaware of- my goal is to bring you this information so that you can see how enjoyable and rewarding healthy eating can be. I have a B.S. in Food, Nutrition, and Dietetics from U.C. Berkeley and a Ph.D. in Nutritional Biochemistry and Metabolism from M.I.T. For many years I carried out scientific research on heart disease, fat nutrition, and cancer.
I now work at Threshold Enterprises in Scotts Valley, Ca, helping to make Source Naturals food supplements.