2017年6月8日星期四

What Really Happens to Your Body When You Ditch Carbs

What Really Happens to Your Body When You Ditch Carbs
You know that one friend who got really into his fat-heavy paleo diet and started smelling kind of weird? That stink isn’t coming from unwashed gym clothes. There’s actually a real, scientific explanation, and it has to do with your pal’s new low-carb diet. And his strange breath isn’t the only consequence.
When it comes to carbs, there are a thousand agendas and biases. To figure out conclusively what is actually happening inside our bodies when we stop eating the stuff, we reached out to three dietary experts to enlighten us.


You may seem more toned and trim.
Getty Images1 10

You may seem more toned and trim.

Going no-carb usually makes people think their new diet worked instantly since they look a little slimmer in the mirror. But don’t be fooled, this is just water weight. “A normal diet with carbohydrates allows you to store carbohydrate as glycogen in the liver and muscles,” says Laura Cipullo, a Registered Dietitian and certified diabetes educator. “The body uses this storage form of sugar in between meals and when exercising. When you store [that form of] sugar as glycogen, you store it with water. If these reserves are used, your muscles lose hydration, making you appear more toned and thin.”
Your bodyweight, however, will probably stay about the same (assuming you haven’t changed anything else about your diet). “If calories remain the same, and you weren’t losing weight before, you won’t start losing weight now just because of swapping out carbs for fats or proteins,” says Mike Gorski, an RD and fitness trainer.
“When calories are cut significantly for the intention of weight loss, metabolism usually drops too, leading to a plateau, then weight regain,” says Amanda Bontempo, an RD with a Master of Science degree in medical nutrition therapy. Basically, your metabolism is dependent on the quality of food you consume, but calories are what really count.


Your body will start breaking down fat and protein stores.
Stanislaw Pytel / Getty Images2 10

Your body will start breaking down fat and protein stores.

This is called ketosis. “After your body has used up most of your stored carbohydrates, [or] glycogen, it’s forced to start breaking down stored fats and converting them into ketone bodies,” Gorski says. But don’t worry, burning fat stores isn't a bad thing, so long as you have fat to lose. However, Gorski thinks that breaking down muscle tissue, which can happen when your body doesn't have carbs and fat to burn, is always a bad thing because it makes you weaker. Carbs spike insulin, which can lead to fat gain via caloric surplus, sure, but it also drives muscle production since it’s an anabolic hormone.
http://www.mensjournal.com/health-fitness/collections/what-really-happens-to-your-body-when-you-ditch-carbs-w485285/your-body-will-start-breaking-down-fat-and-protein-stores-w485288

没有评论: