A high intravenous dose of vitamin C could one day reduce the size of cancerous tumors in people, new studies say. When tested on mice, intravenous vitamin C produced hydrogen peroxide, which proceeded to reduce cancerous tumors in the mice by 43 percent to 51 percent.

The mice had ovarian, pancreatic and brain cancer. The normal cells remained unharmed by the therapy

The makers of a herbal dietary supplement are paying $23 million to settle a class action suit against them for falsely claiming their product can ward off germs and prevent the common cold and flu.

The settlement by Airborne makers Victoria Knight McDowell, an elementary school teacher from Carmel, California, and her screenwriter husband Thomas Rider McDowell, includes refunds to consumers who bought the tablet and advertising placements in selected publications informing the public how to get the refund

With fall approaching the days are growing shorter and cold weather is quickly approaching, many Americans will not be getting the necessary levels of vitamin D in the coming months, a deficiency that could put them at higher risk for such serious illnesses as cancer, diabetes, heart disease, depression and osteoporosis.

Christiane Wert Rivard a registered dietitian says, "Sunshine is a significant source of vitamin D.....The body produces vitamin D when the skin is exposed to direct sunlight. However, as we head into these colder and darker months, it's essential to increase your intake of vitamin D since time spent outside is limited

The U.S. Food and Drug Administration (FDA) on Friday issued new rules for the manufacturers of vitamins, herbal pills and other dietary supplements which makes it mandatory for them to test all of their products' ingredients.

FDA says that the new rules are formulated to address concerns that existing regulations allowed contaminated or unnamed labeled ingredients into the market. The agency found out last year that some supplements contained undeclared active ingredients used in prescription drugs for erectile dysfunction

According to a new study, antioxidants taken by millions of people worldwide have no effect on increasing their life span. It also includes vitamins A, E and C and beta carotene and selenium.

The new study, appearing in Wednesday's Journal of the American Medical Association, said it's still too early to rule out health benefits of vitamin pills adding that antioxidants are more effective when they are consumed in food rather than pills