I came across a very recent article on "How many servings of fruits a day can lower risk of type 2 diabetes?" written by Lakshita Jain, certified clinical dietician and a lecturer. The link is given at the bottom of the post.
While it was in my mind to make an exclusive post on fruits, but this article triggered me to make this post.
It is not only Lakshita, but even Dr Promod Tripathy who conducts a program called " Freedom from diabetes " and Dr Biswaroop Roy chowdhury who created a lot of sensation in digital media when he claimed that he can reverse type 1 by a plant based diet predominantly with fruits...
It is not only India, in USA too, there are lot of well qualified MD doctors some of them with Ph.D such as Cyrus khambatta, Neal barnard , Dr Greger, Dr Esselstyn, Mc dowel ...and many more are running diabetic programs and recommending fruits as a part of healthy diet for diabetes.
Even organisations like ADA, AHA, CDC, WHO....also recommend fruits for diabetes as a part of healthy diet.
In spite of that most diabetes eat very little fruits or avoid all together, ignoring all advice, fearing blood sugar spike.
In this post, we will discuss why fruit is important for diabetes?
How fruits metabolism takes place in our body?
Why most diabetes tend to avoid fruits?
what type of fruits one should eat and how much?
How will you know if you are intolerant to fruits?
Who all should avoid fruits?
Interesting?
So Fruits are important for everyone including diabetes!
The main component of fruits is water which varies from 80-96% depending upon the type of fruits and this water comes from under-ground through the roots of the tree, the stem, the branches and then all the way to the fruit...fruit water being the most purified form of water available in the earth and water alone does not raise blood sugar and is very much essential for human body.... Our body consists of 60% water.
The other components of the fruits are Fructose, Glucose, Fiber, Micronutrients such as Vitamins and minerals, anti-oxidants and Phyto-nutrients.
No doubt that vitamins,minerals, anti-oxidants, fiber, Phyto-nutrients from fruits don't spike blood glucose. These are very much essential for human body to keep you fit, fight free radicals, fights body inflammation, and keep you disease free. Vitamin C is a strong anti-oxidant found in all fruits , that protects your health , protects from infections, give you immunity, unfortunately does not get stored in body. Being a water soluble vitamin , it gets excreted through urine and therefore need to be replenished on a daily basis. A latest research indicates that it is very helpful in people with auto immune disease. No wonder, our ancient Muni , Rishi's used to live with fruit only diet in mountains and forests . Today , most indians fast with fruits on religious festival days .....in west many people call fruit diet as a detoxification diet.
The two components of fruits which fuel our cells namely Glucose & Fructose - all fruits have a Glucose & Fructose ratio of 50:50 roughly though the components may vary with the type of fruit by say 10-15%.
Do you know that fructose has a very low Glycemic index of 20 when Glucose has glycemic index 100 ? But we mistake Fructose as a culprit , as fructose is much more sweeter than Glucose..But the fact remains is that Fructose does not spike blood sugar.
So if you notice your blood glucose spikes with a fruit like banana or a mango it is the glucose component which spikes? So the villain is glucose not the Fructose in fruit...
We will come to fructose later in the post ? But here it is worth mentioning that it is not that all the people notice blood glucose spikes with all the fruits....
Will give you an example...I was avoiding Alphanso Mango last year mango season...as my blood glucose used to spike up to 140-150 after eating an Alphanso with my breakfast.
But this season, even after eating 2 Alphanso mango's with my breakfast, my PP blood glucose was only 120-125. It gave me confidence and this season I must have taken at least 7-8 kg of mango's during last 2 months. So, it is because, I seem to have reduced my insulin resistance and enhanced my insulin sensitivity through modifying my main diet and life style.
In other words, if eating a fruit like mango is spiking your blood glucose, it means you continue to have strong insulin resistance or you may be severely insulin deficient (beta cells partially defunct) which you need to work upon.
However, in spite of Insulin resistance, you still can have fruits which may not spike your blood glucose... Some tips are small servings with every meal, select specific fruits which does not spike.... You will find many... Also avoid over ripen fruits......semi ripe spikes less than full ripe fruits.....You may find some useful tips for selecting fruits for diabetes from many articles ..one such Link is given below ... The second link... So, you need not avoid fruits all together unless you have severe allergic to some specific fruits.... Or other 4-5 reasons as mentioned towards the end of this Post .
Now coming to the Fructose component of the fruit, what makes Dr Biswaroop of India and Neal barnard & Cyrus Khambatta of USA to advocate Fruit / fructose to reverse diabetes? What is the science behind such recommendation? Cyrus Khambatta, Ph.D and Robby both live with Type 1 diabetes for last few decades predominantly with fruit diet with ultra low fat and they claim they have reduced insulin requirement by half. ( please refer the article - 3rd link ) Both of them are running diabetic clinics and 1000's of followers including type 1's vouch in favour of fruits as I could read from their face book page- most of the Type 1's were wearing CGM and or Dexcom and so they were able to monitor blood glucose status in a better way & continuously ..............( unfortunately in India there is hardly any Type1 with CGM/ Dexcom ...it is costly and not funded by insurance ....so it is not popular ) .....So what is the science behind fruits & fructose ???
Before we discuss Fructose metabolism, let us see how Glucose is metabolised in our body- once we eat glucose,it directly goes to your blood and it then requires insulin so that the Glucose is used by our body cells for fuel.
Fructose does not require any digestive enzymes, it does not go to your blood....does not call for insulin....in stead, Fructose travels from small intestine to Liver with the help of GLUT5 & GLUT 2 transporters. Then the Liver processes the fructose and converts it partly in to Lactate & partly in to Glucose ( both ultimately fuel our cells ) ... Less than 1% of fructose is converted in to triglyceride.
So, basically, fructose in fruits does not need much help from pancreas/ Insulin for its absorption. It is the liver which processes the fructose.
Having said that, never go to the extreme end of consuming excessive stand alone fructose in form of HFCS (High fructose corn syrup), it could be toxic for health............But fructose in fruits in our daily diet is harmless...if consumed sensibly depending upon your diabetic status. It does not demand much insulin. So your pancreas is happy.
But there are exceptions...Who should avoid Fruits?
(1) People with strong IR or people with the extreme end of insulin deficiency,...( Type 2) ....though you may still take select fruits and watch portion size. Always check your blood Glucose to confirm your limits in stead of relying on hear-say.
(2) if you have Fructose intolerance or allergy to specific fruits...You may feel bloated, windy, gas, even pain in stomach.
(3) some people may lack fructose transporter GLUT 5 ... So you may have symptoms as mentioned in point-2.
(4) some people with SIBO- small intestine Bacterial overgrowth..some friendly bacteria from Gut overflows upwards to the small intestine.......SIBO Symptoms are as mentioned in point 2. However, those people can eat Low FODMAP fruits diet after consulting their doctors.
(5) people with IBS (irritable bowel syndrome). At times SIBO / IBS go side by side. They can also have a Low FODMAP diet.
indianexpress.com/article/l...