Dr. Jaban Moore, a functional medicine doctor, highlights the potential side effects of certain vitamin supplements. He advises against taking synthetic B12, magnesium oxide or citrate, and ferrous sulfate due to their adverse effects, and suggests natural alternatives for better absorption and overall health. Dr. Jaban Moore, a functional medicine doctor, highlights the potential side effects of certain vitamin supplements. He advises against taking synthetic B12, magnesium oxide or citrate, and ferrous sulfate due to their adverse effects, and suggests natural alternatives for better absorption and overall health. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle