What vitamin should not be taken with B12?

Understanding Vitamin B12 Absorption Interferences

When managing your daily supplement and medication routine, paying attention to potential nutrient interactions is essential for maintaining optimal health. Specifically, certain substances can interfere with how your body processes and utilizes vitamin B12, a vital nutrient responsible for nerve function, red blood cell formation, and DNA synthesis.

Medical experts note that taking vitamin B12 alongside high-dose vitamin C (ascorbic acid) supplements can sometimes reduce the amount of available vitamin B12 in the digestive tract. To prevent this interaction from impacting your nutrient levels, healthcare providers often recommend spacing them out by taking your vitamin C at least two hours after your vitamin B12 supplement.

Additionally, medications that reduce stomach acid—such as proton pump inhibitors like omeprazole (Prilosec) and lansoprazole (Prevacid)—can significantly lower the body's ability to absorb vitamin B12 properly. Because stomach acid is required to release B12 from food sources for absorption, long-term use of acid-reducing drugs may increase the risk of a deficiency over time.