How many people dream of:
Eating Hayser and not getting fat?
But it's a fantasy
Among the three major nutrients
Carbs, people love and hate!
thereupon
"Carbohydrate Blocker"
Emerged
"Feast Savior", "Sweets Without Burden", "Carb Ultimate Savior"
It is claimed that eating a staple food before eating it blocks the absorption of high-carb foods
Helps stabilize blood sugar
Many people are planted by fitness people and celebrities
Is it really that effective?
Today we will rationally analyze a wave
Digestion and absorption of carbohydrates
First of all
Let's take a look
The principle of digestion and absorption of carbohydrate in the human body
carbohydrates
It is composed of one or more monosaccharides in various forms
Monosaccharide molecules
Does not need to be digested and can be directly absorbed
Disaccharides such as sucrose and lactose
In the small intestine
Is sucrase and lactase
Catalyzed hydrolysis into monosaccharides is absorbed
Starch (polysaccharide)
In the oral cavity is first initially hydrolyzed by amylase
Due to the short stay time of food in the mouth
It is then entered into the small intestine for primary digestion and absorption
Finally it is decomposed into monosaccharides that are absorbed
Carbohydrate blocker
Also called
Amylase inhibitors
The main ingredient commonly found on the market is white kidney bean extract
What actually works is
α-Amylase Inhibitors (α-AI)
We digest and absorb starch
need
ptyalin
and
amylopsin
Role
Α-AI can inhibit these two enzymes
Make them unworkable
It has the effect of preventing the decomposition and absorption of starch
This reduces the intake of sugar
Lowers blood sugar and lipid levels
This reduces fat synthesis and reduces body mass
It looks like it's really good
Come to pack the blocker, eat and drink no problem
But is that really the case?
α-AI is only effective for starch
For foods with a high starch content
It does work well
But how much activity can be retained after stomach acid?
How much starch is prevented from being digested and absorbed in the end?
This is not certain
Foods with high starch content are common
The above is the starch content per 100g of edible part (g)
来源：McCance & Widdowson’s The Composition of Foods
And in everyday life
We eat more in fact
Pastries, sugary drinks, desserts and much more
The carbohydrates they contain are not simply starch
but
Free sugars such as sucrose, glucose, and fructose
α-AI can't help it
Fried chicken, braised pork
Don't be even more difficult for it
More added sugars ↓↓
Can carb blockers lower blood sugar?
The following are healthy adult volunteers
Effects of different doses of white kidney bean extract on postprandial blood glucose
The peak of postprandial blood glucose in the three groups occurred in 45 to 60 minutes, reaching about 7mmol/L. Compared with the white rice-only group, the average blood glucose of the +4 and +6 g white kidney bean extract groups of rice was significantly reduced at 45min to 60min.
Experiments show
Carb blockers do
Pass
Reduces the rate of absorption of carbohydrates
Thus reducing the GI of food
Improves insulin sensitivity
It has an improving effect on postprandial blood sugar
Can carb blockers lose weight?
In a randomized, double-blind, placebo-controlled study in China, 101 volunteers with BMI between 25 and 40 participated. 3 times before meals 1 g of white kidney bean extract, after 60 days, the mean weight loss was 1.9±0.15 kg in the active group, compared with 0.4±0.13 kg in the placebo group (p
There is indeed a weight loss effect
Control of staple foods
The results are even better
Side effects of carbohydrate blockers
Currently in human clinical studies
There have been no reports of its serious side effects
Experts believe that a dose of up to 10 grams per day is safe
May produce gastrointestinal side effects
Examples include flatulence and diarrhea
People who are usually prone to flatulence and diarrhea should still be carefully chosen
Does eating white kidney beans directly produce the same effect?
NO!NO!
α-amylase inhibitor is a glycoprotein
After the high temperature, it can be inactivated
You're just getting more starch
There is no inhibition effect
Is it eaten raw?
That's even worse!
Kidney beans contain toxic proteins
Plant lectins (PHA)
It must be cooked thoroughly to eliminate toxicity
Better utilize its nutritional benefits
Otherwise it can cause poisoning
generally
Want to lose weight in the long term and rely solely on carbohydrate blockers
It's not scientific
For a lot of people
Gaining weight is not because you eat too much starch!
In contrast, a variety of added sugars in processed foods
It is the reason for everyone's failure to lose weight
These disaccharides do not require amylase hydrolysis
So starch blockers are useless for this
I want to lose weight low-carbon but have poor self-control
Friends who can't resist the temptation of high-carbon water staple foods
Blockers can be tried
Starch blockers are just a helper for you to get healthy
And not an excuse for your indulgence diet
After all, it can only block part of the carb
And not all!
Healthy Weight Loss Unchanging Truth:
Shut your mouth and spread your legs
Food makes sense
Source: Department of Nutrition, Run Run Shaw Hospital
Author: Jin Yuqian Reviewer: Feng Lijun
Original title: The new generation of weight loss artifacts that stars are also using, is it really effective or IQ tax?