Book excerpt: Did you know the synthetic B-vitamins found in supplements cannot be absorbed well or easily converted into the bioactive forms our cells 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. Learn how the naturally occurring vitamers DO work and why, and start on your pathway to healthy living and longevity today!