What should you not mix biotin with? Taking certain medicines can lower your blood levels of biotin, which could affect your biotin dose needs.
What vitamins Cannot be taken together? Some vitamins that should not be taken together, or have dosage limitations, include vitamin C with vitamin B-12, vitamin A supplement with vitamin A-rich foods, folic acid (vitamin B9) and vitamin B12, and vitamin E with vitamin K.
What vitamins should you not take with C? Vitamin C and B12 According to Dr. Airey, some studies have shown that Vitamin C could break down Vitamin B12 in your digestive tract, reducing your B12 absorption. As a result, he says you want to wait at least two hours before taking Vitamin C with your Vitamin B12.