RadioMD News... I'm John Byrd.

Increased vitamin C levels in the body can protect against cataracts, a new study has found. Higher levels of vitamin C in the diet, not from supplements, can slow the progression of the disease by one-third over the course of a decade.

Two decades of progress toward eliminating tuberculosis in the U.S. has stalled, the CDC reports. The incidence of the lung disease has held steady in the past two years. The bacterial infection is spread through the air. If not treated, TB can be fatal.

And... fruit drinks and smoothies are healthy, right? Maybe not as much as we thought. Just a single glass of fruit juice can contain a full day's worth of sugar in a single serving, a new study shows. In addition to the naturally occurring sugars in fruit, manufacturers add in unacceptably high levels of extra sugar in the form of glucose, fructose and sucrose. The worst offenders? Smoothies. Experts recommend limiting intake and eating fresh fruit, instead.

For RadioMD News, this is John Byrd. Hear health talk interviews with top experts at RadioMD dot com.