Dr. Jason Fung – The Trouble With Fructose Sign up for free Type II Diabetes educational videos: www.healthyourselfguide.com/SHN In this video Dr. Jason …
So people for many many years thought
fructose, "Yeah, that's pretty good stuff.
So, you know, what can be wrong with that?"
The problem really with fructose is the
way it's metabolized. So whereas your
whole body can use glucose, so when you
eat bread, for example, insulin goes up
and all the cells of your body will use
that glucose. So your muscles, your liver,
your kidneys, and everything. When you eat
fructose, none of it can use fructose,
because it's not-
you can't metabolize it, so it goes
straight into your liver. And your liver
has nothing to do with it,
because there's plenty of glucose around,
so if you take sugar, table sugar it's
one glucose, one fructose, you have plenty
of glucose around, so your body doesn't want
it. It goes into your liver and therefore
gets turned sort of straight into fat. So
it immediately becomes fatty liver. As
you develop, so more and more fatty liver,
then that's when you get the insulin
resistance and the type 2 diabetes,
that's really the core problem is this
fatty infiltration of the liver. So the
story with fructose is that when we talk
about sugar there's sort of a technical
term which is encompasses glucose and
fructose, those are the main sugars of
the body. When we talk about table sugar,
it's actually something called sucrose,
which is one molecule of glucose and
molecule of fructose. So if we ignore
things like lactose and galactose and
stuff, it's mostly glucose and fructose
that we're talking about. So if you eat
bread, wheat, or rice or something, you're
talking mostly chains of glucose, which
is what makes up starch. So the the bread,
and the rice and the potatoes, those are
all mostly glucose and almost no
fructose. Fructose in table sugar is one to
one, so it's one glucose one fructose, and
fruits mostly contain fructose. Fructose
is the sweetest naturally occurring
carbohydrate, and when you look at a
measure such as the
glycemic index, fructose looks pretty good,
because when you measure blood sugar
it's actually blood glucose you're
measuring, so because fructose is not
glucose, when you eat fructose it doesn't
show up as a spike in your blood glucose. When you eat bread, because it's all
glucose, it will show up as a spike in
your blood glucose. So if you think about
it, if you were to take a pound of bread
or pasta or whatever, all, say your body
weighs 180 pounds, all
180 pounds of your body
is using up glucose. If you take a pound
of sugar, for example, then half of it is
glucose and half of it is fructose. So
180 pounds is going
to use the glucose but all sort of half
a pound of sugar is going straight into
your liver, like the five-pound liver. So
in other words, the fructose is many, many,
many times worse at causing type two
diabetes, obesity,
you know, insulin resistance than the
glucose. And that's really the secret of
why there were these societies, like
China for example, in the 80s where
they're eating a lot of white rice,
that's all they ate practically, white
rice and vegetables, and there is
virtually no diabetes. The reason is that
their bodies their muscles and
everything is using it. As opposed to the
the fructose, which is going straight to
your liver, directly causing this
insulin resistance. So if you think about
it, you have a hundred and eighty pounds
of body using glucose. For fructose,
there's a five pound liver, so it's like
you know, ten or twenty times worse to
eat the sugar than it is to
eat the bread. And that's something that
people have always recognized. Again, if
you just simply were to ask your
grandmother, she would have told you that
the first thing you want to do to lose
weight is stop eating sugar, stop eating
the sweets. It's much more fattening. It
might be the same calories, but the way
is metabolized is completely and utterly
different. So sugar is really the main
thing, and I think if you look at sugar,
it's really sort of tapered off. A lot of
people have been
cutting it out. So there's hope that the message
that sugar is really a huge problem is
getting out there. The problem is there's
a lot of hidden sources of sugar and so

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