Hi, Welcome to Health Care Magic, thanks for posting your query. I understand your concern. Taking caffeine drinks in the morning can interfere with your absorption of some important minerals and vitamins. So i suggest you to drink your morning coffee , 15 minute later to have a glass of water and then 30 minutes after the coffee drink to pop in your vitamin tablet. A 30 minute interval must be good enough to reduce the interference of both. You could also include in your diet certain food rich in vitamin A, B1, C like green vegetables, spinach, citrus fruits, meat, dairy products .. This balanced diet should prove good for your hair too, and will reduce your hair loss. Reduce stress and massage with a good hair oil 2-3 times a week. Hope this helps, and answers your query satisfactorily. Do write back if you need further assistance. Wishing you good health and good luck with the weight loss. Regards.