Current multi-vitamins are obsolete because the synthetic B-vitamins found in supplements cannot be absorbed well or converted into the bioactive forms our cells actually use? Even other vitamins can't work well if there is not enough of the naturally occurring B forms called vitamers. For example, without B vitamers, taking vitamin D won't prevent osteoporosis. My book will explain how to improve your chances of heathy living and longevity by using the bioactive forms of these B vitamins.