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B1 中级 英语 5:11 Educational

How do carbohydrates impact your health? - Richard J. Wood

TED-Ed · 7,053,557 次观看 · 添加于 3 周前

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00:06

Which of these has the least carbohydrates?

00:09

This roll of bread?

00:10

This bowl of rice?

00:12

Or this can of soda?

00:14

It's a trick question.

00:15

Although they may differ in fats, vitamins, and other nutritional content,

00:19

when it comes to carbs, they're pretty much the same.

00:23

So what exactly does that mean for your diet?

00:26

First of all, carbohydrate is the nutritional category for sugars

00:30

and molecules that your body breaks down to make sugars.

00:34

Carbohydrates can be simple or complex depending on their structure.

00:38

This is a simple sugar, or monosaccharide.

00:42

Glucose, fructose, and galactose are all simple sugars.

00:46

Link two of them together, and you've got a disaccharide,

00:50

lactose, maltose, or sucrose.

00:55

Complex carbohydrates, on the other hand,

00:57

have three or more simple sugars strung together.

01:00

Complex carbohydrates with three to ten linked sugars

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