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Which is worse: Glucose or fructose?

David posted the following interesting question on the Nutrition Diva Facebook page:

“Your podcast on nutritional trade-offs made me think of the following question: I try very hard to limit my intake of sugar. But some foods do need some kind of sweetener, and so I’m wondering about what alternatives to table sugar you recommend. Some are higher in glucose, and that brings with it a higher glycemic index. Others have a lower glycemic index, but are higher in fructose, which experts say to avoid. What do you think?”

Most sweeteners, including table sugar, honey, maple syrup, agave nectar and so on, contain glucose and fructose in varying amounts. Table sugar is half glucose and half fructose. Agave nectar on the other hand is about 70% fructose and only 30% glucose.

These two sugars are metabolized through different pathways. Glucose is absorbed into the blood stream and fructose is metabolized in the liver. So agave nectar is going to cause a lower rise in blood sugar than table sugar. On the other hand, studies in rats suggest that too much fructose can increase the amount of fat stored in the liver and that’s not good.

So are you better off with a sweetener that’s higher in glucose or one that’s higher in fructose? Continue reading “Which is worse: Glucose or fructose?” >

How the media distorts science. (Harumph!)

Two items crossed my Facebook feed within the last week or so that were textbook examples of how science is ridiculously twisted in pursuit of clicks.

The first one was just silly.

gin

In her column for the British website Stylist, headlined “5 Reasons Drinking Gin Could  Be Good for You,” Amy Lewis explains that juniper berries contain vitamin C and other antioxidants and phyto-compounds which, she claims, can fight colds and flu, protect the skin from drying, and boost digestion.

Forget for a moment that there is no credible evidence that juniper berries provide any of these health benefits. Let’s pretend, in fact, that these were all demonstrated effects of the juniper berry. What would this have to do with drinking gin? Absolutely nothing. Continue reading “How the media distorts science. (Harumph!)” >

How to Slow Age-Related Muscle Loss

By the time we’re in our 30s, most of us have already reached our peak in terms of lean muscle mass. From that point on, most of us are gradually losing muscle. It’s not obvious at first, but by the time you’re in your 60s or 70s, the difference in body composition is really dramatic. At that age, you usually see a lot less firm muscle tone and a lot more soft flesh and loose skin.

But age-related muscle loss isn’t just a cosmetic issue. So much of the loss of function and vitality that commonly accompanies aging actually begins with this gradual loss of muscle tissue starting in mid-life. As we lose muscle, we lose strength and stamina and this means we can’t do as much as we used to. We aren’t as strong and we tire more easily.

As you lose muscle, you also tend to lose bone tissue. Thinning bones eventually lead to the frailty, falls, and fractures that we typically associate with people in their 80s—but the seeds for this are sown way back in middle life when we start losing muscle mass.

This article is also available as a podcast. Click to listen

OK enough with the bad news. How about some good news? If you can hang on to more muscle as you age, you can turn this entire ship around and age more successfully. And I have some strategies that can help you do just that.

How to Slow Age-Related Muscle Loss

I recently got an email from David, who wrote: “I’m a 54-year-old man with an excellent diet, plenty of exercise, and no medical issues. Like many men my age, I’m experiencing gradual muscle loss. I supplement with protein powder, and I’m wondering what other things I might take that might help with muscle loss, or any other tips you might have.”

Of course, there are no shortage of supplements that claim to help you build muscle. But these supplements have a dubious record of safety and efficacy. So, David, before you start taking any other supplements, let’s be sure that you’re getting the maximum benefit out of the nutrients that you’re already taking in—including your protein powder.

Timing Your Protein Intake

As you may have suspected, dietary protein is key to building and maintaining muscle mass. But it’s not necessarily a matter of taking in more protein. The typical 50-year-old guy gets about 90 grams of protein, which enough to maximize muscle protein synthesis. However, he may be eating the lion’s share of that protein at dinner time. In the US, we get about 42% of our daily protein at dinner and only 16% at breakfast.

In terms of maximizing muscle synthesis, this is a missed opportunity.

Research shows that for guys in their twenties, muscle synthesis peaks at an intake of about 20 grams of protein. As we get older it takes a little more protein to hit that peak—about 30 grams at a single meal. That’s about what you’d get from four ounces of cooked chicken, lean beef, pork, or about six ounces of tofu. Protein intakes above that amount don’t really provide any extra muscle-building benefit.

Now, consider our typical eating patterns: If we’re only eating 10 or 15 grams of protein at breakfast, we’re not consuming enough maximize muscle protein synthesis. Meanwhile, if we’re eating 50 grams of protein at dinner time, some of that protein is being wasted in terms of its muscle-building benefits.

You can build and maintain more muscle by dividing up your protein intake more evenly over the day.

So, even without increasing your total protein intake at all, you can build and maintain more muscle by dividing up your protein intake more evenly over the day. Instead of hitting that muscle-building peak dose of protein only once a day, you could be reaching it three times a day. In terms of hanging on to muscle mass as we age, this could make a big difference.

How to Increase Protein at Breakfast

Protein powder can be an easy way to increase the protein content of breakfast without adding an excessive number of calories or having to eat a huge meal. For example, you can add a scoop of whey protein to a smoothie, stir it into your oatmeal or yogurt, or even blend it into your peanut or almond butter and spread it on toast.  If you’re a breakfast baker, you can replace 1/3 of the flour in your muffin or pancake recipe with whey protein powder. Any one of these strategies can boost the protein in your breakfast from the typical 10-15 grams to the optimal 30 grams.

Try to include a similar amount of protein at lunch and dinner, too. (You can look up the amount of protein in common foods using a diet tracker like My Fitness Pal) or on my Protein Cheat Sheet.

Originally published at QuickandDirtytips.com

How does cooking affect the nutrients in meat?

Rotisserie chickenKate writes:

“I’m concerned about cooking the nutrients out of my food. There is plenty of information about fruits and veggies but what about meat? What is the best way to cook common meats to preserve the nutrition? Thanks!”

Good news, Kate! The primary nutrients in meat (protein and minerals) are pretty resilient to heat, so cooking meat does little to reduce its nutritional value.  Some of the fat may render out of the meat as it cooks but most people consider this to be a plus. If you’re cooking meat in liquid (as in a stew or soup), some of the minerals and protein may leach from the meat into the cooking liquid. But if you consume the broth, little will be lost.

The vitamins and antioxidants in fresh fruits and vegetables, on the other hand, are a little more fragile–and that’s why you’ve probably seen more about the effect of cooking on the nutritional value of these foods. Continue reading “How does cooking affect the nutrients in meat?” >

An easier way to stay on track

diettrackerKeeping a record of everything you eat–whether you jot it down in a notebook or use a mobile app like My Fitness Pal–can be a very effective tool for improving your eating habits. Part of it is increased awareness and part of it is the accountability. Even if no one ever sees your diet log but you, you may decide to pass on that random cookie or doughnut hole if you know it’s going on your “permanent record.”

On the other hand, it’s kind of a pain. Even with the convenience of a smart phone app, logging every bite you eat every day quickly becomes tedious. Most people start to drift away from the habit after a week or two–often, when they have a day they’d just as soon be “off the record.” And the benefits of that increased awareness and accountability gradually slip way. Continue reading “An easier way to stay on track” >

DASH diet (with a twist) could help with gout

imageAlthough gout sounds like something Henry the VIIIth might have suffered from (actually, he did), this painful form of arthritis is still very common today.  It occurs when uric acid builds up in the blood rather than being excreted in the urine. Uric acid crystals can cause exquisite pain in the joints, often in the big toe.

Gout is typically managed with medications that reduce uric acid levels in the blood along with dietary modifications, such as avoiding alcohol, red meats, shellfish, and sugary beverages. But a new look at some old data suggests a new way to keep gout at bay. Continue reading “DASH diet (with a twist) could help with gout” >

The absolute worst time to decide what to eat

power-of-planningThree years ago, in an episode of the Nutrition Diva podcast, I talked about the power of planning:

“I find I make far better choices when I plan ahead—and I bet the same is true for you. One of the interesting things about human nature is that we tend to make different choices for our future selves than we do for our present selves.

“Choices that we make for our future selves are more likely to be in line with our larger goals, such as eating healthy or saving money. Decisions that we make in the moment tend to focus more on short-term desires and instant gratification.” Continue reading “The absolute worst time to decide what to eat” >

Unintended consequences of the clean eating movement

Is this chemical in your food?
Is this chemical in your food?

Eating “clean” has been a buzzword for a couple of years now, even though the term is so vague that it’s hard to know whether you’re doing it or not.

There is no concrete definition for “clean” food but for most people it suggests eating foods that are closer to their natural state and less processed. Although it’s pretty easy to identify a green bean as “clean” and a jelly bean as not, foods like cheese or bread or orange juice occupy a gray area somewhere in between.

See also: Why processed foods can be good for you

“Don’t eat anything you can’t pronounce” is another common refrain, and this has led food manufacturers to “clean up” their labels by removing preservatives and other additives. But our mistrust of multi-syllabic words is having an unintended consequenceContinue reading “Unintended consequences of the clean eating movement” >