Vitamins, herbs and other dietary supplements are sold as natural alternatives to pharmaceuticals and many people turn to them in an attempt to improve their health, or help with serious medical conditions. Others seek dietary supplements to lose weight or enhance health and fitness performance. But are vitamins, herbs and other dietary supplements safe?
Vitamin supplements do not protect against lung cancer, according to a study of more than 77,000 vitamin users. In fact, some supplements may even increase the risk of developing it.
Two new studies help clarify the role that certain vitamins may play in the onset of cognitive decline, including risk of dementia and Alzheimer's disease.
One in two adults takes a daily vitamin pill, and Americans spend nearly $12 billion annually on vitamins and supplements. Now, an editorial published in this week's Annals of Internal Medicine says that using supplements and multivitamins to prevent chronic conditions such as heart disease and cancer is a waste of money.