Name: What is Carbohydrate?
Uploaded: 2016-04-22T06:44:24.000Z
Duration: 3 min 20 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

What are carbohydrates What is carbohydrate. Like proteins and fats,

carbohydrate, or carbs, is an energy providing macronutrient. In fact, carbohydrates, in

the form of glucose, is your body's first choice of energy production. Through a tricky

but quick process known as glycolysis, your body metabolizes glucose into pyruvate. During

this process, 2 units of the body's energy providing molecules known as ATP is generated.

During physical activity, your body repeatedly goes through this process up until 45 seconds

to 3 minutes where the glycolytic pathway begins to fatigue. From then on, you will

either need to rest or your body will tap into other fuel sources.

All carbs are eventually metabolized into the simple sugar glucose, with the exception

of dietary fiber since the body isn't able to break it down. Excess glucose in the body

is stored in the form of glycogen, which is simply glucose molecules chained together

into branches. Unfortunately, there's a limit to how much glycogen can be stored, which

caps at about 500 to 1200 grams. All other excess glucose is then metabolized into fat.

Maintaining blood glucose levels is really important to your body to ensure you have

energy readily available. Whenever your body is low on carbs, it breaks down glycogen into

glucose in a process known as glycogenolysis or metabolize non-carb substances such as

lactate and pyruvate into glucose in a process known as gluconeogensis. At the point where

your body depletes both glucose in the bloodstream and all of its glycogen stores, the body begins

to transition into a state known as ketosis. In this state, compounds known as ketone bodies

becomes the main source of energy. Touted for its fat-burning attributes, getting into

the state of ketosis has become popular with low and no carb diet programs. Whether this

is safe, or even more effective than glucose, is still debated to this day.

But are all carbs created equal? A rising concern in today's world is the overconsumption

of the so-called "bad" carbs from processed foods such as fast food and children's cereal.

But the problem is not so much that these carbs are "bad," in fact, they're not really

bad at all, they are just carbs in its simplest forms known as monosaccharide and disaccharides,

which are the same sugars found in fruits and dairy. In fact, glucose is a monosaccharide

and we all know how important glucose is to our body. The problem with processed foods

is that it contains too many of these monosaccharides in a single serving. Since these carbs are

in its simplest form, it's relatively easy to digest and to digest a lot in one meal,

which pushes your calorie intake up. And as we've discussed before, the more calories

you consume, the more weight you will gain. The so-called "good carbs" that come from

foods such as oatmeal and whole wheat bread, are simply considered "good" either because

they contain dietary fiber, which will make you feel fuller while consuming fewer calories,

or they contain complex carbohydrates such as polysaccharides which takes longer to digest.

If moderation is taken into consideration, having some of these "bad" carbs isn't going

to do much harm, in fact, they come very handy if you need a quick boost of energy.

As far as how many carbs you consume, you should shoot for roughly 45 to 65% of your

daily calories. On a standard 2,000 calorie diet, that's roughly 225 to 325 grams per

day. If you're trying to get stronger, consuming carbs before your workout might help with

a few extra reps. If you're performing endurance activities, carbs right after will help replenish

glycogen levels. If you're trying to lose weight, eating fiber-containing carbs and

more protein will help bring the calories down. And if you're trying to keep the doctor

away, a delicious carb-loaded apple might come save your day!

Click here if you want to learn about the macronutrient protein and come back later

when we cover the third and final macronutrient, fats.

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