Do you know what you're taking? Do you take vitamins? minerals? nucleic acids? amino acids? supplements? medicinal herbs? If you do, you need this book! Used incorrectly, many of these substances can be harmful. Did you know: -megadoses of vitamin A can cause bone pain, birth defects in babies, hypertension? -long-term excess vitamin E can cause low sperm count, degeneration of testicles, sterility? -vitamin C can cause gout, kidney stones? Megadoses can interfere with white blood cells' ability to kill bacteria, making infections worse rather than clearing them up? Nearly everyone takes vitamins, minerals, supplements or medicinal herbs. Most people don't believe these are medicines. They're wrong! Learn what you need to know. Easy-to-read charts cover over 75 vitamins, minerals, nucleic and amino acids, other supplements and over 200 commonly used medicinal herbs. At-a-glance information tells you: -Proved and speculated uses -Sources -Deficiency symptoms -Correct recommendations by RDA -Warnings and precautions -Signs of overdose -Adverse reactions and side effects -Possible interactions with drugs and other substances Be a smart consumer of vitamins, minerals, supplements and medicinal herbs. This book tells you how!