Blog Posts by Dr. Ayala

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What makes a food healthy? The definition of healthy food and nutritious food is absolutely essential in order to answer the question: "is organic food healthier".

But a new widely publicized study published in the Annals of Internal Medicine this week answers this question without digging deeper into what defines "healthy". The study reviewed research comparing organic and conventional foods and concluded that there's "limited evidence for the superiority of organic foods".

Let's see what the study actually found.

Fewer pesticides, more phenols, no more vitamins

The researchers, led by Dena Bravata and Crystal Smith-Spangler identified 237 of the most relevant organic vs. conventional studies. Those included 17 studies (six of which were randomized clinical trials) of humans consuming organic and conventional diets, and 223 studies that compared either the nutrient levels or the bacterial, fungal or pesticide contamination of various products including

The Wall Street Journal reported this week that New York's attorney general is investigating whether the booming multibillion-dollar energy-drink industry is deceiving consumers with misstatements about the ingredients and health value of its products.

The energy drink market is fast growing, and these drinks -- promising boosts of energy -- have become ubiquitous. It's estimated that 30 percent of college students consume energy drinks regularly.

Are there real benefits in these drinks and are they safe? Health advocates have long been raising concerns about these drinks, especially when consumed alongside alcohol.

What's in an energy drink?

Caffeine is the main active ingredient in energy drinks - they usually contain 70 to 80 milligrams of caffeine per 8-oz. serving, more than triple many cola drinks. Additional caffeine can come from energy drink's other ingredients: guarna, kola nut, yerba mate and cocoa.

Energy drinks may also contain taurine (an amino

Habits tend to cluster. People who exercise will often also watch their weight, consider the nutrition label, avoid smoking and get enough sleep. On the other end, unhealthy behaviors bunch together, too, and many of us have a long list of practices their doctor would like them to change in order to lower their risk of disease.

But who wants a long shopping list of to-dos and not-to-dos?

The ideal plan would involve one or two guidelines that could drag with them other positive behavior changes.

Oh, and what if we could also achieve that remotely, with something as simple as a phone app? Wouldn't that be useful?

Eat your veggies and turn the TV off

A new study, published in the Archives of Internal Medicine studied about 200 people who skimped on fruits and veggies, ate plenty of saturated fats, didn't exercise much and had a sedentary lifestyle, (sounds like someone you know?) trying out a mobile technology aimed at behavioral change.

The participants

It has been many a pediatrician's nightmare prediction: rising obesity rates are likely to cause an increase in type 2 diabetes in teens, in much the same way these two conditions are linked in adults.

And this fear has come to pass. Type 2 diabetes, unheard of in kids just a few decades ago (it used to be called adult-onset-diabetes for just that reason!), has become unexceptional in pediatric practice.

But what we've seen so far seems to be just the tip of the iceberg. A new article in Pediatrics looked at a group of about 3400 nationally representative teens (aged 12-19), and found that diabetes and pre-diabetes nearly tripled in less than 10 years, jumping from 9 percent in 1999-2000 to 23 percent in 2007-2008.

The authors, led by Ashleigh May, warn that these results should be interpreted cautiously: Diabetes and pre-diabetes were diagnosed by a single fasting blood sugar test. The true prevalence of type 2 diabetes in kids is hard to know unless blood tests are

School meals are far from perfectly nutritious, even after the long awaited and very welcome changes put in place earlier this year.

The good news is that under the new guidelines kids will hopefully double their fruit and veggie intake, will be served more whole grains, all milk will be low fat, and there'll be upper limits to salt, trans-fat and calories in the school meal. The not so great reality is that kids will continue to eat lots of highly processed foods - very few schools actually cook food from scratch - and tomato paste on pizza counts as a vegetable.

But school food isn't just the subsidized school lunch; competing with it are the foods sold in schools -- in vending machines, school stores, and a-la-carte in the cafeteria -- which make a big part of what kids actually eat while they're in school.

The USDA administers and regulates the school lunch program, and is developing nutrition guidelines for the foods and drinks sold at schools. (The Healthy,

Much of our eating is mindless and automatic. That's why environmental changes can lead us to overeat. Many argue that what's at the root of the obesity epidemic is the transformation in our environment, which gradually changed into an obesity-promoting one.

Proximity and convenience affect food choices. Food makers know that the closest, easiest to grab, and most noticeable food items will sell more, that's why they place the products that they want you to buy on an eye-level shelf, near the checkout and in an open case. Previous studies have shown that when candy is placed closer and is in a clear rather than an opaque bowl, people eat more of it.

Could proximity and visibility promote good-for-you foods just as well?

Gregory Privitera and Heather Creary tested how distance and visibility affect apple and carrot consumption. Their new study appears in the Environment and Behavior Journal.

The 96 healthy students in the study were not aware that eating behavior

A happy day, I think, is one in which some time is spent outdoors.

Dog owners take their dogs out daily, and pediatricians suggest we extend the same kindness to our kids.

No, seriously, kids need the outdoors quite critically. Outdoors translates to physical activity and fitness, and the more time kids spend outdoors the less likely they are to become obese. Kids don't exercise in gyms; they have bursts of intense, vigorous, heart racing activity while playing in a large open space, when they're chasing a friend or a squirrel, or repeatedly going up and down a slide. Playing outdoors also helps kids' development and growth and does wonders to their vision, coordination, vitamin D levels and mood!

Experts say that free play - especially outdoors - is crucial to a kid's health, but chances to play outside have been on the decline over the past few decades. Busy lives, over anxiety about safety, screen based entertainment and lack of awareness are keeping kids

We'd like to think we're free to make choices about our everyday life.

But studies show that almost half of the actions people take each day aren't actually a result of decisions - they're driven by habit alone.

Habits are so strong and so ingrained that they override many other thought processes. It seems like our human brain, trying to save on energy, goes into autopilot for every process it can use old routines for, and will fight any proposed change. The positive side of habit is that once you've mastered dressing up in the morning and backing out of your garage, your mind can wander free while you're performing a rather complicated task. The negatives are quite clear to anyone trying to lose weight or stop smoking.

Charles Duhigg's "The Power of Habit" is a fascinating exploration of the research of habits, and is packed with absorbing stories about how habits influence every aspect of our lives - the way we shop, listen to music, drive, and of course eat is