This authoritative book from Consumerlab.com is a must-read for anyone who takes - or has ever considered taking - a vitamin, mineral, herbal product, or other supplement. Read it for ConsumerTips to keep in mind when buying and taking supplements. Trust it to provide indispensable information including: which supplement brands meet ConsumerLab.com's testing standards; which vitamin products have ingredient levels that are too low or too high, and which ingredients can't be absorbed; which herbs may be contaminated with carcinogens or made from the wrong plants; and: which mineral and other supplements may have less than half the ingredients claimed. - Back cover.