And to complicate matters even more, many vitamin and mineral supplements are made with synthetic forms of vitamins that aren't readily absorbed, or could actually be detrimental. (truthaboutabs.com)
As such, people should beware of buying any yeast supplement that is fortified with synthetic forms of this vitamin. (thehealthyhomeeconomist.com)
Many dog owners like the fact that Dr. Tim has removed menadione from the formulas, as this is a controversial synthetic form of Vitamin K that is believed to cause kidney problems in dogs. (petfoodtalk.com)