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4 Metabolism Myths and Facts

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Dorothy View Drop Down
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    Posted: 17 Jan 2017 at 10:13am
Why can one person eat like a growing teenager and not gain a pound, while another person's every indulgence shows up on the scale? Chalk it up to individual differences in metabolism, muscle mass and physical activity. Metabolism is the process by which our bodies convert what we eat into the energy we need to survive and function. It powers everything from breathing to blinking. A fast metabolism is like a hot furnace that burns through fuel (calories) quickly. A slow metabolism needs less fuel to keep a body running.
It's tempting to throw up our hands and blame weight issues on a slow metabolism, but there are ways to support metabolism and maintain a healthy weight.
Claim: Our metabolic rates can't change.
The truth: While it's true that genetics help determine our metabolic rates, we can boost metabolism by increasing lean muscle mass. Muscle burns more calories per hour than fat, which means that people with lean, muscular bodies need more calories to function than people with a higher percentage of body fat.
Our muscle mass decreases as we age, and this contributes to a slower metabolic rate. But you can counteract this process by picking up the weights to help lessen this decline.
Claim: A diet of green tea and chili peppers will boost metabolism.
The truth: No magic food will speed up metabolism. Some studies have shown that green tea and hot chilies temporarily boost metabolic rates, but the lift isn't enough to offset eating too many calories.
The path to healthy weight loss is through portion control and a balanced diet filled with nutrient-rich foods, not through a diet doused in chili peppers.
Claim: Eating late at night slows metabolism.
The truth: It's the extra calories — not when you eat them — that cause weight gain. There is little evidence to support the fact that eating after 8 p.m. causes weight gain. However, you may be more likely to snack mindlessly in the evenings while watching television. Calories in these snacks add up, and that can cause weight gain.
Claim: Very low calorie diets and skipping meals can jumpstart weight loss.
The truth: Weight loss is all about creating an energy deficit — ingesting fewer calories than your body expends each day — but creating too large of a calorie deficit can backfire. Our bodies are smart and programmed for survival. Severely limiting calories can make your body think it's entering a famine, and that it needs to do more with fewer calories. Your body adapts to the restricted caloric intake, and uses fewer calories to perform the same tasks.

From the Academy of Nutrition and Dietetics

Reviewed by Taylor Wolfram, MS, RDN, LDN
Published January 16, 2017
Dorothy McFadden
bariatric dietitian
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Nadia View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nadia Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jan 2017 at 5:29am
That is a good explanation of how an individual's metabolism works.
RNY 6/30/09 Dr.Holland
Healthy choices forevermore.
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