Allison Aubrey

We almost brought you news today about a study that appeared to raise some troubling questions about aspartame, the popular sugar substitute found in many common foods like diet soda. Note the key word — almost.

A study due to be published at 3 p.m. Wednesday in the American Journal of Clinical Nutrition and released to reporters earlier in the week under embargo found some correlation between drinking diet soda and an increased risk of leukemia and Non-Hodgkin's lymphoma, as well as a few other rare blood-related cancers.

The idea that milk may diminish the potential heart-health benefits of tea has been a topic of some debate. Lots of us can't imagine black tea without a little dairy to cut the bitterness. But, according to this research going back to 2007, we might want to at least consider trying, say, a nice cup of green tea sans sugar or cream.

Beginning next week, McDonald's plans to add calorie counts to its menu boards — both at drive-thrus and restaurant counters. Studies suggest that calorie boards alone don't change consumers' purchasing patterns. But consumers do seem to take note, and public health experts say it's one tangible step to helping consumers make healthier choices.

It may be more important than we thought to tackle obesity in childhood. A new study published in Pediatrics finds that overweight teenagers eat fewer calories than their healthy weight peers.

That's right — they eat less.

Yes, organics is a $29 billion industry and still growing. Something is pulling us toward those organic veggies that are grown without synthetic pesticides or fertilizers.

But if you're thinking that organic produce will help you stay healthier, a new finding may come as a surprise. A new study published in the Annals of Internal Medicine finds scant evidence of health benefits from organic foods.

High school students with heavy academic course loads often find the demands of homework colliding with the need for adequate sleep.

The "know your farmer" concept may soon apply to the folks growing your coffee, too.

Increasingly, specialty roasters are working directly with coffee growers around the world to produce coffees as varied in taste as wines. And how are roasters teaching their clientele to appreciate the subtle characteristics of brews? By bringing an age-old tasting ritual once limited to coffee insiders to the coffee-sipping masses.

There's no magic elixir for healthy aging, but here's one more thing to add to the list: good gut health.

A study published in the latest issue of Nature finds diet may be key to promoting diverse communities of beneficial bacteria in the guts of older people.

To evaluate this, researchers analyzed the microbiota, or gut bacteria, of 178 older folks, mostly in their 70s and 80s.

It's no longer just foodies at farm markets or Whole Foods buying antibiotic-free, pasture-raised meats.

When it comes to walking, the easy part is understanding the benefits: Regular, brisk walks can strengthen our bones, help control blood sugar, help lower blood pressure and cholesterol, and the list goes on. The hard part is finding the time to fit it in.

Engineering physical activity back into Americans' daily lives is the goal of an educational campaign launched by Kaiser Permanente,an Oakland, Calif.-based health plan.