Juice Causes Diabetes
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photo credit: amberbow92
Update: This article has attracted some poorly informed protests that suggest sugar as a key causal factor in diabetes is somehow a myth. My statements in this article have been upheld by a study published in 2008 that involved 71,346 women followed for 18 years that found adding just one serve of fruit juice per day increased the risk of diabetes. You can read the full study here - Intake of Fruit, Vegetables, and Fruit Juices and Risk of Diabetes in Women.
I’ve also since expanded on this theme in the following articles:
- The Myth that Sugar Causes Type 2 Diabetes is a Myth
- Sugar, Fat, Insulin & Diabetes: The Saga Continues
- Diabetes, Fructose and Natural Appetite Regulation
- The Difference Between Type 1 and Type 2 Diabetes
———–
Yes, you read the title correctly. I’m sure this is going to upset some people but the truth is the truth. Juice causes diabetes. If you are a fan of juice and are into it for what you thought were its health benefits then you might be feeling like scrolling down and leaving me a nasty comment right about now. Hold that thought my friend. If you’ve read just a few of my other health related articles:
- Talk the Talk, Walk the Walk
- Misinformation and Misperceptions about Meat
- Make One Easy Change and Lose Weight
- The Best Diet for You
- Is Cardio Necessary for Fat Loss?
- Are You a Victim of the Great Cholesterol Con?
- Miss Breakfast at Your Peril!
You would know that I wouldn’t throw a statement like “Juice causes diabetes” around lightly. Take a moment to read this article. After I’ve presented you with some information you may or may not be aware of you might have a change of heart about that nasty comment you were planning. If not, then that is ok to.
What do I mean when I say juice?
To start with when I say “juice” I’m referring to the juice you’re buying from both the commercialized over the counter juice bar and from your local supermarket. I am specifically not referring to any juice you may be having after cutting up fresh organic fruit and vegetables, juicing them and immediately drinking the resultant freshly made juice.
How does juice cause diabetes?
Let me break it down for you. If you were to go visit your doctor and have them check your blood sugar levels they will look primarily at the level of glucose in your blood. However, glucose is just one form or type of sugar that is in your blood. There are several other types of sugar. One of which is Fructose, which as the word suggests is a sugar found in fruit.
The catch is Fructose doesn’t have much of an impact upon your blood glucose levels. And your doctor isn’t checking your body’s level of Fructose. What’s more, research has shown that the number one sugar that causes diabetes is Fructose! That’s right. Sugar from fruit is the number one pro-diabetes sugar.
So next time you go to drink some commercially processed and produced juice or consider giving it to your children, stop. Fruit juice may be taking you and your children down the slippery slope to diabetes. That may sound a little alarmist to you. Which is fair enough. I’m sure for many it might be a bit of a shock.
Lets put this into perspective
Consider your ancestors. No more then a couple hundred years ago if you didn’t live close to the equator where the weather is good for year round fruit production you didn’t eat all that much fruit. If your ancestors originated anywhere outside the small equatorial band then your body is not adapted to eating fruit year round.
There were no trains, planes or global shipping using cold storage methods to ship low priced fruit all over the world year round. This goes back to the idea of what constitutes a healthy diet. If the concept of eating what your body is genetically adapted to is a new one for you then you will want to read my article - A Healthy Diet Means Eating What Your Body is Adapted To.
Now think of drinking juice. I love apples. So if I were to make a big glass of apple juice I’d probably have to juice about four or five apples. That means I’ve removed all the skin, the fiber and if we are talking modern processing methods I’ve removed all the vitamins and minerals as well. What is left is essentially Fructose water. Also known as sugar water.
Have you ever eaten four or five apples in less then a minute? I’d be surprised if you have. The problem is, that is what you are doing when you drink a glass of juice. Only there is no fiber to slow the rate of sugar absorption into your blood. If you know something about the Glycemic Index you would know that things like fat and fiber slow the rate of absorption of sugar from the food you’ve eaten into your blood. Thus effectively reducing the G.I of those foods.
What drink is good for you?
If you want to juice your own fresh organic fruit and vegetables that is a good thing. Just make sure you drink it right away. Otherwise the nutrient value degrades very quickly and you’ll end up with regular sugar water. Also if you love eating fruit like I do then make sure you have some nuts like almonds, walnuts, or pecans with your fruit. Between the fiber in the fruit and the good fat in the nuts the rate of absorption of the sugar in the fruit will be sufficiently slowed. That way you’ll get a nice steady release of energy instead of a sudden spike followed by an equally sudden crash. At which point you’re probably going to reach for more sugar and fake energy from things like coffee and just go around in an unhealthy circle.
Now lets check out my favorite drink. Water. There was a time when I disliked the taste of water. But then I did some research and decided that I had to drink a decent amount of it every single day. Surprisingly it wasn’t long before I got into a serious habit of just drinking water and nothing else. Right now I have a 1ltr glass stein of water on my desk in front of me. Most days I drink about 3ltrs. When I exercise or if it’s summer I often drink a lot more.
How much water should I be drinking?
How much water you should be drinking each day depends on your bodyweight. Take your weight in pounds and divide it by two. That is how much water in ounces you should be drinking each day, minimum. If you do things in liters and kilograms then take your body weight in kg x 0.033 = how much water to drink in liters.
Our bodies are composed of roughly 75% water. Water’s chief functions are to maintain a stable environment inside and around our cells. This allows our cells to acquire sufficient nutrition and aids elimination of waste. For normal digestive processes to occur you need to drink the amount of water you just calculated for your body weight.
If you are dehydrated you cannot produce sufficient saliva when chewing food. Saliva contains digestive enzymes that begin to break down food right there in the mouth. This prepares the food for proper digestion and assimilation in the stomach and intestines. If you do become dehydrated your body will scavenge water from your organs and your central nervous system.
I hope you found this article both informative and interesting. Agree with me? Have questions? Still want to write a nasty comment in defense of juice? Please leave a comment below.
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September 10th, 2008 at 5:17 am
Hmmmm. Interesting post. Of course when you first said that juice causes diabetes, I thought, ok this guy is crazy.
But what you are saying does make some sense, if what you are backing your claim up with is entirely accurate.
I’m sure that fruit juice cannot singlehandedly be the cause of diabetes, but one of them for some people.
Anyway, I’ve stopped drinking juice in the past year, I’ve always found it sickeningly sweet and it doesn’t make me feel good at all…
Thanks for posting, interesting read.
September 10th, 2008 at 5:49 am
Hi Sophie,
I’m glad you found it interesting. My saying juice causes diabetes is a little bit of sensationalism on my part. I do however feel that most cases of dis-ease are the product of a person’s lifestyle. Diet of course is a large part of one’s lifestyle and there is a scary amount of sugar in fruit juice.
When people talk about the behavioral problems of their children I tell them to take a look at what they are feeding their children. If you have a blood sugar crash you would tend to be pretty irritable and basically not much fun to be around. It’s not hard to imagine what sort of behavior a blood sugar crash is going to produce in children.
Also I like that you are a little skeptical. Certainly don’t take my word for it. If anyone is interested they should go ahead and do their own research. Inform yourself and make up your own mind.
September 10th, 2008 at 6:16 am
I definitely agree that juice can cause a lot of health problems. I don’t take canned or bottled juices anymore. The juices I drink must come freshly squeezed. My kids are also not allowed too much sugary drinks or coke too!
September 10th, 2008 at 11:55 am
Interesting point about ancestral diets. No doubt, my Irish ancestors wouldn’t have known a pineapple if it struck them in the eye!
Mind you they probably could have used the vitamin C, I’m sure.
September 10th, 2008 at 12:57 pm
Mine either! From my research the only fruit in ancient Ireland were apples and wild berries.
On the issue of vitamin C you may be surprised to know that a cup of pineapple has roughly 40% of your daily value of vitamin C. On the other hand a cup of Kale contains over 88% of your daily vitamin C requirement. If anyone doesn’t know what Kale is, it is a member of the cabbage family and is something ancient Irish people ate. Even more interestingly it grows mid winter to early spring.
Just for the record a cup of broccoli contains 205% of the daily requirement for vitamin C. At one point a while ago I realized that there is no nutrition in fruit that is not in vegetables. More often then not it is in much more concentrated amounts.
September 10th, 2008 at 1:46 pm
Jeez, I drink lots of juice because I’m lactose intolerant and used to drink lots of milk. The juice I drink is the orange juice not from concentrate stuff, so basically it’s crap is it?
September 10th, 2008 at 2:23 pm
I like the post. I have heard of this before, so your claims are not at all shocking to me. It makes sense too, specially since some people and kids drink more than just 1 glass of this juice, some even replacing it with water, getting the fructose from 50 fruits or more a day, something like that is bound to add up.
I have read your article on ancestral diets, and luckily for me, I am from Colombia, a country near the equator, where there is fruit all year round. For the past week I have put your advice to use on eating what my body is adapted to and I have to say its working great, I’ve lost 5 pounds of fat this week alone.
You’ve mentioned here and on other posts that to research this on our own, to prove that your claims are based on fact, but it is difficult, and I don’t know where to start, since the only places that I know are genuine doctors and researchers are the ones that tells us fat and cholesterol are bad for us and to avoid it at all costs.
Its even worse on the internet, as you cannot see how healthy they are, as opposed to real life where at least I can look at the person telling me these things and see if they are healthy themselves. As you say “Sick people cannot help other sick people get well”, and on the internet its even harder to determine that. Aside from that, I am sure there are many websites that have false data about these things.
So, where do you recommend I start researching for all this? The only 2 sources I have for this are you, and a fitness/nutrition coach that does videos on youtube.
By the way, he does great videos and a lot of what he says I have seen on this website as well, metabolic typing, this juice thing, cholesterol and fat.. so on..
http://www.youtube.com/watch?v=Kj__g0SDx7k
theres a link to his video on juice.
September 11th, 2008 at 1:26 am
@Tim - I would say it is unlikely to be doing you any good. If you were to get the flu I would tell you to eat an orange instead of drinking orange juice. Often juice is fortified with synthetic vitamin C because most of the natural occurring vitamin C has been lost in the processing. However no single vitamin works in a vacuum. What this means is a vitamin needs other vitamins and minerals to be effectively used by your body. So I say go to the source. Eat whole food.
On the subject of your lactose intolerance - I used to be much the same. At one point I remember drinking a big glass of milk and it causing me severe discomfort for days. However, I have since discovered that I had a bad disbiosis. Which means the ratio of good bacteria to bad bacteria in my digestive system was way off. Why this is important is because the good bacteria break down lactose in our gut for us. Among many other important functions vital to good health. Try taking a good probiotic for a month and then have a small amount of organic unhomogenized milk to test. I’d be interested to see the results.
@Christian – It is fantastic to hear that you’ve put the information here on my blog to the test of your own experiment. I understand the problems you have not knowing where to begin in the sea of health and diet information that is out there. Firstly, what you have already done – test what I’m saying for yourself – is probably the single most important thing you can do if you want to find the truth. You see, we are all different, if someone else was to eat the diet that you just lost 5 pounds in a week on they are just as likely to gain 5 pounds. So you must test what the information you gather using yourself as the guinea pig and when you do so be sure to really pay attention to what your body is telling you.
Signs you are on the right track include – good digestion and regular easy elimination, better levels of sustained energy, clear mind and clear thinking, less irritable then previously, clear eyes and skin, and so forth. These are all signs that what you are doing is right for you.
On the subject of research I would point you in much the same directions that Underground Wellness would. That is because we are both big fans of a person called Paul Chek. You can find him on YouTube and I suggest you do. We are also both big fans of Weston A Price - http://www.westonaprice.org/splash_2.htm.
I also suggest three books – Paul Chek’s - How to Eat, Move & Be Healthy, Weston A. Price’s – Nutrition and Physical Degeneration, and T.S. Wiley’s Lights Out.
All these resources make many references to scientific studies, which you can then seek out and read for yourself to ensure they back up the author’s conclusions.
September 27th, 2008 at 8:59 am
[...] and what nasty things happen to your body when you become dehydrated. You might also like to read Juice Causes Diabetes to find out exactly how much water you should be [...]
September 27th, 2008 at 10:14 am
[...] Dehydration and Constipation When your don’t give your body the water it needs it then goes ahead and scavenges it from your organs, from your central nervous system and from your digestive system. I don’t think I have to tell you that that is a bad thing. Before I go any further if you would like to know exactly how much water you should be consuming every day then please see my article – Juice Causes Diabetes. [...]
October 15th, 2008 at 1:41 am
Hi Stephen,
I found this article quite interesting.
I have the following that I think backs up your statement about drinking freshly squeezed juice straight away. A few years ago, during winter time, I travelled to work by public transport three days a week. During my journey I would drink a large glass of orange juice (that was freshly squeezed from two oranges) that also had an ice-cube that was a combination of freshly squeezed lime and lemon juice (at the time one of the markets I went to was selling boxes of lemons and limes at $5.00 per box). All of the fruit pulp was retained and mixed into the juice. The juice was diluted with water (for a 50% juice & 50% water mix). My fluid intake at work was usually 3 to 4 litres of water and a can of coke (as an aside I’ve totally given up drinking soft drinks and have stuck to this for the past 563 consecutive days).
What I found was during that Winter I didn’t suffer from any colds or chest infections. So I feel that fruit juice can be beneficial as long as it’s freshly squeezed, the pulp is mixed in with the juice, diluted with water and plenty of water is drunk each day as well. What’s your take on this paragraph?
October 15th, 2008 at 2:00 am
Hi Ben,
Thanks for taking the time to leave a comment. I have to agree with you. With freshly squeezed juice the vitamins and minerals are still present for a time plus you were watering it down 50/50, which I think is a good idea. Normally eating two oranges takes time and I think dilution and drinking it over the span of a train trip would simulate that.
Essentially you were slowing the sugar dump and making it more gradual. That way the juice didn’t cause a blood sugar spike and subsequent crash. Keeping the fruit pulp is very good to. Fiber also slows sugar absorption into the blood.
As with most health issues nothing is precisely black and white. Thanks for helping to highlight that. As you found this article interesting you might like to check out some of my other health related articles. Particularly - Are You Becoming Dumber?
Thanks again.
Stephen
October 15th, 2008 at 2:12 am
[...] by Stephen Cox you can visit BalancedExistence.com. Here are a few of my favorite must reads: “Juice Causes Diabetes”, “How to Become Dumber”, “How to Overcome Daily Fatigue and Tiredness”. [...]
October 26th, 2008 at 1:55 am
[...] can have are green apples, berries, avocados, grapefruit, lemons and limes. All others including fruit juice is off [...]
December 10th, 2008 at 11:45 pm
[...] to increase our weight. When our blood sugar spikes when we eat sugar (and especially when we drink sugar), our bodies store any extra sugar-energy that it cannot use right away as fat.1 This is a unique [...]
March 5th, 2009 at 3:42 am
You may not publish this comment since I’m disagreeing with you. Any form of carbohydrate is turned to glucose (blood sugar)in the body. Fruits, vegetables, sugar, honey, flour, etc are ALL forms of carbohydrates, as is the fructose you talked about. Consuming carbohydrates do raise your glucose level, but in a person without diabetes, it does not get as elevated as someone with diabetes. In a non-diabetic, your body takes care of itself when carbs are consumed…the pancreas produces enough insulin to cover the carbs (which have turned to glucose)and the cells allow the insulin to carry the glucose in to serve as energy for the body. When you have Type 2 diabetes (usually adult onset, but some kids who are obese/sedentary are developing it), these cells are resistant to allowing the insulin to enter, so the glucose remains in the blood stream outside the cells…high blood glucose results. With Type 1 diabetes (formerly known as Juvenile Diabetes until it was found that some…such as myself…develop it as an adult), you are born with it on your DNA and it takes an external trigger to set it off. These external triggers are things like certain levels of stress, certain viruses, and some other theories, but certainly not from consuming sugar or any other form of it, such as fructose. The trigger causes the T-cells to see the Beta cells in the pancreas as foreigners and start killing them off. The Beta cells are what make the insulin. Therefore, there is no insulin, or not enough, to carry the glucose in the blood stream into the cells, which results in hyperglycemia (high blood sugar). Type 1 Diabetics have to have insulin injections the rest of their lives in order to live. Some Type 2s also get to the point where they need insulin also, but some can treat it with diet and exercise alone, while other Type 2s also need to take oral medication in addition to diet & exercise in order to control their blood glucose levels. Sugar (in any form, whether from sugar cane, honey, fructose, etc) being the CAUSE of diabetes is an OLD MYTH!!
March 5th, 2009 at 5:22 am
Hi Pam,
I’m well aware that all forms of carbohydrates are broken down into sugar in the blood. The difference between the sugar in juice and the sugar in say the apple I’m eating right now is that a bunch of fiber comes with the sugar in the apple while the juice is just sugar and water. Fiber slows sugar absorption causing the body to release a slow steady stream of insulin. While the sugar in the juice with nothing to slow it down gives a rapid hit of sugar into the blood.
Big spikes in blood sugar result in big spikes in insulin and the body tends to release too much insulin which causes the blood sugar crash after the spike. Over time too much insulin in the blood from too many sudden high sugar spikes causes the insulin resistance you spoke of. I’d like to see you explain how insulin resistance occurs without including the causal power of sugar in the explanation.
Saying insulin resistance is the cause of Type 2 Diabetes is falling short of seeing the whole causal chain. If a person has Type 2 Diabetes because they are insulin resistant how does a person become insulin resistant? The answer is from a consistent period of too much sugar released too quickly into the blood. I fail to see the myth.
Stephen
June 3rd, 2009 at 7:54 am
[...] because pepper stimulates the production of hydrochloric acid in the stomach. Also if you are dehydrated your body may not have enough water available to produce adequate amounts of hydrochloric acid and [...]
August 14th, 2009 at 2:08 am
this is interesting. i was searching this topic because I just bought a juicer and i’m like drinking tons of cucumber/carrot/apple juice everyday. thanks for the post!
October 1st, 2009 at 7:01 am
The idea that eating lots of sweets, candies, juices, etcetera causes diabetes is a total myth. The major risk factors for type 2 diabetes are heredity, overweight, and lack of exercise. A healthy person’s body can easily cope with frequent blood sugar spikes, which have nothing at all to do with insulin resistance.
On the contrary, juices are extremely good for us because they carry a veritable godload of nutrients and antioxidants that can help prevent disease (for example, resveratrol, which is found in concord grape juice, may have a protective effect against diabetes). If you like your juice freshly squeezed, then by all means, drink it that way. But store-bought juices are still very good for you as well.
To reduce risk of diabetes, people should maintain a healthy weight and exercise plenty. By the way, anyone who is having the very common “That’s not possible, everybody knows that sweets cause diabetes!” reaction should just go and type “diabetes myths” into Google. You’ll find the myth debunked by several different medical professionals. Or you could just phone up any decent endocrinologist, if you don’t trust the internet (who could blame you, frankly).
October 2nd, 2009 at 3:12 am
Johnson,
You must mean an endocrinologists like Robert H. Lustig, M.D., UCSF Professor of Pediatrics in the Division of Endocrinology who’s hour and a half long lecture I embedded into a recent post Sugar, Fat & Workout of the Day No. 2. Perhaps you should do yourself a favor and listen as he explains exactly how fructose is processed by the liver, not noticed by the brain, and how it makes people fat. And then consider why being fat is correlated with having diabetes. Meaning the same thing that causes people to be fat causes people to have diabetes.
That thing is insulin resistance because if the receptors on your cells are resistant to insulin the sugar in your blood cannot enter the cells and so instead must go into fat stores. Further, the reason why exercise is good for people with type 2 diabetes is because it reduces the insulin resistance of their muscle cells. After which sugar in the blood can then be pushed into the cells because insulin now works the way it should by opening up the cell to put the sugar and other nutrients in instead of it going to fat stores like it was. See how the picture all fits together?
Lustig expressly states in the video that in nature the poison (fructose) is packaged along with the cure (fiber). So if you take the poison (fructose as juice) away from the fiber (the fruit) you get problems.
Also store-bought juices are all pasteurized just like milk to kill bacteria and extend shelf life. Pasteurization means they heat the juice up to kill the bacteria. The heat destroys the nutrients in the juice which is why they have to fortify things like milk and juice by adding vitamins back in. Only these are synthetic nutrients and nutrients work in a synergistic relationship. So simply adding back in synthetic vitamin C and not all the other nutrients does not do any good.
Further, I looked at some websites that purport to debunk the “myth” that sugar causes sugar diabetes. None of them actually debunk anything by way of explanation. They just say “this is a myth”. Saying something is so does not make it so.
Perhaps you would like to explain to me precisely why being overweight and not exercising results in diabetes? I can explain (as I did above) the physiological process based on an understanding of how the body works. All you bring is “it’s a myth”. You’re going to have to do better than that.
October 4th, 2009 at 3:14 am
[...] recently in response to my article – Juice Causes Diabetes – for the second time I’ve had someone leave a comment declaring sugar as a primal cause in [...]
November 3rd, 2009 at 8:13 pm
[...] they are now. Varieties of fruit have also been manipulated to be sweeter. You couldn’t even buy orange juice in Australia until the [...]