I have heard lots of excellent reviews on GNC ultra. its like the starting tablet for those starting a vitamin regime. personally, i am not willing to pop more than 3 tablets a day cos i worry of long term effects on my liver. i am planning to take a good multivitamin with iron and zinc in it plus GNC when i can get it. apart from that I will be eating my greens everyday and a small portion of cooked liver (very very rich in vitamins) each month.