Name: 為什麼這種 "零卡路里甜味劑 "不是零卡路里？ (Why This “Zero Calorie Sweetener” Isn’t Zero Calories)
Uploaded: 2021-01-14T10:36:46.000Z
Duration: 4 min 18 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

we had an enthusiastic young presenter talking about food science

Alex, from Technicality Studios, it's all yours.

It's known as a zero-calorie sweetener or a healthy replacement for sugar.

“Splenda no calorie sweetener, with the original sugar-like taste you love and trust.”

Have you ever thought to yourself it's a little strange that a food has zero calories?

If you, say, eat plastic, nothing really will happen.

If you eat it, you can't take energy from it.

So, before answering how many calories Splenda really has, if any,

we first have to answer if Splenda has any usable calories at all.

Well, when we eat and digest sugar, or sucrose,

our body turns it into glucose and fructose.

Fructose is delivered to your liver and promptly turned into glucose,

and glucose is the stuff your body uses as energy.

To find out if there's any calories in this packet of Splenda,

we have to find out if there's any glucose in this packet of Splenda

it seemed easy after my chemistry teacher explained that to me like 20 times.

For the first experiment, the control test,

we'll dissolve 0.2 grams of sugar and 0.1 grams of an enzyme called invertase in water.

Enzymes are things that speed up chemical reactions, or catalysts.

Thus, the enzyme will quickly break down sugar into glucose and fructose.

In the second experiment, we'll use the exact same procedure,

Instead of using sugar, we'll use Splenda.

Now that we've gathered all the materials, let's get started.

Note to future editing self: this is Splenda.

So, now I'm going to dissolve both of those things in water,

Now that we've dissolved everything in the test tube,

let's put them in a warm water bath like this for 20 minutes.

The water should be about 37 degrees Celsius or body temperature.

This is the best temperature for the enzymes.

Benedict's solution will tell us if there's glucose in these test tubes.

Benedict's solution is named after Stanley Rossiter Benedict, an American chemist,

and not Benedict Cumberbatch, a British actor.

Now, when we put in the Benedict's solution,

we're going to replace the 37-degree water with boiling water.

Then, let's add in a few drops and wait for the Benedict's solution to do its thing.

So, we just learned that how Benedict's solution works is basically it's a spectrum,

So, blue would be the least amount of glucose, no glucose.

And then there's red, which would be the most amount of glucose,

Now, as you can see, these two are basically kind of orangey-caramel coloured,

but the one in the Splenda solution actually is a little darker and a little more intense,

So, that means there's actually more glucose in the Splenda than the actual sugar.

Splenda, which is marketed as a zero-calorie alternative to sugar,

actually has more glucose than actual sugar.

Well Splenda's most-used ingredient is dextrose.

So, how many calories are in these packets?

And they wrote back that there are four calories

in each single serve packet of Splenda no calorie sweetener

Side note here, one gram of sugar has four calories

and each packet of Splenda is about a gram.

why is Splenda allowed to say they have none?

It might seem sketchy, but it's completely legal.

The Food and Drug Administration allows foods with fewer than five calories per serving

to be marketed as having zero calories down to the nutrition label.

That means you can't trust any food that claims it has zero calories.

Thank you to Tom for giving me the privilege of making a guest video.