As an MD, I say stop wasting money on vitamins that don't have the necessary PURITY or POTENCY. Yes, use nutrition to help manage various medical issues, but use items with a higher quality than provided by pharmacies or health food stores. Consider THYROID boosters as just one example. No amount of store bought vitamins can match the evidence-based formula, 'Med Caps T3'. It has the crucial items & amount of vitamin D, selenium, iodine, plus carnosic from rosemary. See www.ThyroidPower.com This show is broadcast live on Wednesday's at 12PM ET on W4HC - Health Cafe Live Network (www.w4hc.com) part of Talk 4 Radio (http://www.talk4radio.com/) on the Talk 4 Media Network (http://www.talk4media.com/).