Eating lots of orange and dark green veggies like carrots, sweet potatoes and green beans may prevent disease and lead to a longer life. Experts say this could be due to the antioxidant alpha-carotene:

Consumption of fruits and vegetables has long been associated with lower risks of health problems such as cancer and heart disease, said Dr. Chaoyang Li of the U.S. Centers for Disease Control and Prevention, in Atlanta, in e-mail to Reuters Health.

However, it is still not clear which elements contribute to the health effects or how they do so, he added, pointing to recent studies that have found no apparent benefit for beta-carotene supplements.

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A new study by the Pennington Biomedical Research Center says that walkers who incorporate some light weight-training into their workout can increase fitness benefits in less time:

What's more, those who mixed up their workouts showed the greatest improvement in blood sugar control after nine months, says Timothy S. Church, MD, PhD, of the Pennington Biomedical Research Center in Baton Rouge, Louisiana, who led the study.

"Our findings really support the 2008 federal physical activity guidelines, and our findings support those guidelines for everybody," Dr. Church says. These guidelines recommend people get at least 150 minutes of walking or 75 minutes of running a week, along with two or more days a week of resistance training.

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Researchers say that a spoonful or two of apple cider vinegar a day may boost your levels of good cholesterol. This could be because vinegar speeds up the processing of fats:

Apple cider vinegar — a common kitchen remedy for arthritis and gout — has already been shown to lower blood sugar levels and reduce appetite.

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