I am very wary of supplements in the marketplace. I know of some that contain little more than filler sold under deceitful advertising. I have used supplements from Dr. Vita, Inc. for several years and am very grateful to have such efficacious products to contribute to my health regimen. I highly recommend Dr. Vita Inc., supplements. Next time I'm in Las Vegas, I'll make a point of visiting their manufacturing facility which I understand is open to the public by appointment. Dr. Vita Inc. is a first class company, with integrity - a rare commodity in the supplement business.