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Showing posts with the label sugars

The 2013 PLoS ONE sugar and diabetes study: Sugar from fruits is harmless

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A new study linking sugar consumption with diabetes prevalence has gained significant media attention recently. The study was published in February 2013 in the journal PLoS ONE ( ). The authors are Sanjay Basu, Paula Yoffe, Nancy Hills and Robert H. Lustig. Among the claims made by the media is that “… sugar consumption — independent of obesity — is a major factor behind the recent global pandemic of type 2 diabetes” ( ). As it turns out, the effects revealed by the study seem to be very small, which may actually be a side effect of data aggregation; I will discuss this further below. Fruits are exonerated Let me start by saying that this study also included in the analysis the main natural source of sugar, fruit, as a competing variable (competing with the effects of sugar itself), and found it to be unrelated to diabetes. As the authors note: “None of the other food categories — including fiber-containing foods (pulses, nuts, vegetables, roots, tubers), fruits, meats, cereals, and ...

My transformation: I cannot remember the last time I had a fever

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The two photos below (click to enlarge) were taken 4 years apart. The one on the left was taken in 2006, when I weighed 210 lbs (95 kg). Since my height is 5 ft 8 in, at that weight I was an obese person, with over 30 percent body fat. The one on the right was taken in 2010, at a weight of 150 lbs (68 kg) and about 13 percent body fat. I think I am a bit closer to the camera on the right, so the photos are not exactly on the same scale. For a more recent transformation update, see this post . My lipids improved from borderline bad to fairly good numbers, as one would expect, but the two main changes that I noticed were in terms of illnesses and energy levels. I have not had a fever in a long time. I simply cannot remember when it was the last time that I had to stay in bed because of an illness. I only remember that I was fat then. Also, I used to feel a lot more tired when I was fat. Now I seem to have a lot of energy, almost all the time. In my estimation, I was obese or overweight f...

Insulin responses to foods rich in carbohydrates and protein

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Insulin is often presented as a hormone that is at the core of the diseases of civilization, particularly because of the insulin response elicited by foods rich in refined carbohydrates and sugars. What is often not mentioned is that protein also elicits an insulin response and so do foods where carbohydrates are mixed with fat. Sometimes the insulin responses are way more than one would expect based on the macronutrient compositions of the foods. Holt et al. (1997; full reference at the end of this post) conducted a classic study of insulin responses. This study has been widely cited, and paints an interesting picture of differences in insulin responses to various foods. But you have to be careful where you look. There has been some confusion about the results because of the way they are often reported in places like Wikipedia and on various Internet sites that refer to the study. The key thing to bear in mind when reviewing this study is that the amounts of food used were designed to...

PepsiCo to reduce sugar and fat in products

I guess PepsiCo is moving ahead of the competition, but in a snail pace and in a very, very politically correct way. Will this help in any way? I doubt. It is just too little, too late. See article here . The article states that: The company also set two goals for the next 10 years: to cut the average added sugar per serving by 25 percent and saturated fat per serving by 15 percent, in addition to adding more whole grains, fruits, vegetables and low-fat dairy into its array of products. While it is nice to see more of a focus on sugar than on saturated fat, I would have preferred to see something like this: The company also set two goals for the next 5 years: to cut the average added sugar per serving by 95 percent and increase saturated fat per serving by 50 percent, in addition to adding more vegetables and full-fat dairy into its array of products. What would happen? Well, Indra Nooyi is a very smart CEO, and the company has many competent people. They know that they would probably ...

Want to improve your cholesterol profile? Replace refined carbs and sugars with saturated fat and cholesterol in your diet

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An interesting study by Clifton and colleagues (1998; full reference and link at the end of this post) looked at whether LDL cholesterol particle size distribution at baseline (i.e., beginning of the study) for various people was a determinant of lipid profile changes in each of two diets – one low and the other high in fat. This study highlights a few interesting points made in a previous post , which are largely unrelated to the main goal or findings of the study, but that are supported by side findings: - As one increases dietary cholesterol and fat consumption, particularly saturated fat, circulating HDL cholesterol increases significantly. This happens whether one is taking niacin or not, although niacin seems to help, possibly as an independent (not moderating) factor. Increasing serum vitamin D levels, which can be done through sunlight exposure and supplementation, are also known to increase circulating HDL cholesterol. - As one increases dietary cholesterol and fat consumption...

How much vitamin D? Vitamin D Council's recommendations

Since my recent post on problems related to vitamin D deficiency and excess I received several questions. I have also participated in several discussions in other blogs related to vitamin D in the past few days. There is a lot of consensus about vitamin D deficiency being a problem, but not much about vitamin D in excess being a problem as well. Some bloggers recommend a lot of supplementation, which may be dangerous because: (a) our body evolved to obtain most of its vitamin D from a combination of sunlight exposure and cholesterol, and thus body accumulation regulation mechanisms are not designed to deal with excessive oral supplementation; and (b) vitamin D, like many fat-soluble vitamins, accumulates in fat tissue over time, and is not easily eliminated by the body when in excess. The Vitamin D Council has the following general recommendation regarding supplementation: Take an average of 5,000 IU a day, year-round, if you have some sun exposure. If you have little, or no, sun exp...

Applied evolutionary thinking: Darwin meets Washington

Charles Darwin, perhaps one of the greatest scholars of all time, thought about his theory of mutation, inheritance, and selection of biological traits for more than 20 years, and finally published it as a book in 1859.  At that time, many animal breeders must have said something like this: “So what? We knew this already.” In fact George Washington, who died in 1799 (many years before Darwin ’s famous book came out), had tried his hand at what today would be called “genetic engineering.” He produced at least a few notable breeds of domestic animals through selective breeding. Those include a breed of giant mules – the “Mammoth Jackstock” breed. Those mules are so big and strong that they were used to pull large boats filled with coal along artificial canals in Pennsylvania . Washington learned the basic principles of animal breeding from others, who learned it from others, and so on. Animal breeding has a long tradition. So, not only did animal breeders, like George Washington, ha...

Go see your doctor, often

As I blog about health issues, and talk with people about them, I often notice that there is a growing contempt for the medical profession. This comes in part from the fact that many MDs are still providing advice based on the mainstream assumption that saturated fat is the enemy. Much recent (and even some old) research suggests that among the main real enemies of good health are: chronic stress, refined carbs, refined sugars, industrial trans-fats, and an omega-6/omega-3 imbalance caused by consumption of industrial vegetable oils rich in omega-6 fats. Because of this disconnect, some people stop seeing their doctors regularly; others avoid doctors completely. Many rely exclusively on Internet advice, from health-related blogs (like this) and other sources. In my opinion, this is a BIG mistake. A good MD has something that no blogger who is not an MD (like me) can have. He or she has direct access to a much larger group of people, and to confidential information that can clarify thin...

Refined carbs, sugar, and cholesterol: My own experience

A few years ago I went to the doctor for a routine appointment, and I was told that my LDL cholesterol was elevated. I was in my early 40s. My lipid profile was the following - LDL: 156, HDL: 38, triglycerides: 188. The LDL was calculated. I was weighing about 210 lbs, which was too high for my height (5 ft 8 in). My blood pressure was low, as it has always been - systolic: 109, diastolic: 68. My doctor gave me the standard advice in these cases: exercise, lose weight, and, most importantly, reduce your intake of saturated fat . I was also told that I would probably have to take statins, as my high LDL likely had something to do with my genetic makeup. Again, this is quite standard, and we see it all over the place, particularly in commercials for statins. I told my doctor that I would do some research on the topic, which I am going to save for other posts. Let me get to the point, by telling you what my lipid profile is today - LDL: 123, HDL: 66 , triglycerides: 46 . Again, the LDL va...