One twin gave up sugar, the other gave up fat. Their experiment could change YOUR life. Twins Alexander and Chris Van Tulleken set out to find out which is worse They were allowed to eat as much as they wanted and exercised the same. Alexander couldn't have carbs and Chris was allowed only a tiny bit of fat By. Alexander Van Tulleken. Published. 0. 0: 2. Keralites Community Network for Infotainment. A Group for those who love Keralam and Keralites. This book is a classic, it`s really the one that started the entire dating/pickup industry, and if I could only recommend one book about dating it would be this one. That`s because it gives you the foundation, the basics of. Find and watch recommended videos for you, staff picks, and popular content from the best creators and channels on Dailymotion. Geoffrey Keynes, A Bibliography of William Blake (New York: Grolier Club, 1921). Keynes and Edwin Wolf, William Blake's Illuminated Books: A Census (New York: Grolier Club, 1953). Keynes, Engravings by William Blake: The. GMT, 2. 8 January 2. My twin Chris and I have each gained and lost a lot of weight since we qualified as doctors 1. At. my lightest, I was 9. But then I. moved to the U. S., my life became sedentary and in a few years I was. The twins are 3. 5 and 'both gluttons' so they 'have to pay some serious attention' to expanding waistlines. Chris was back in England at a normal weight of 1. I was a fat version of him - a. Weight. gain and obesity can be explained by lack of willpower and self- control. But when you have one thin twin and. I put it down to stress and the birth of my son, but those things didn't really explain what had changed. I. managed to lose quite a bit of that weight while working in the. But here's the. problem: despite being doctors - I also have a degree in public health - . These. topics fall between the cracks at medical school. Yes, we understood. But which diets work, why we eat too much and why. And remove all fruit and veg - they all have carbs - and you get constipated'Superficially. Well, not if you look at the debate. For years it was thought fat. But the. 'fat is bad' dogma is being widely challenged. Carbohydrates, including. But. which really is worse for you? In a unique experiment for BBC's. Horizon, Chris and I set out to find the answer by going on different. Identical twins like us are extremely useful in. This means any. changes we observed would be due to the diets and not genetics. I. went on a no- carbohydrate diet - essentially no sugar - and Chris went. We were allowed to eat as much as we. I couldn't have carbohydrates and Chris was allowed only. However. in every other respect, including our exercise levels, our lives were. I thought I'd got the better deal: I. But take away carbohydrates. And remove all fruit and veg - they all. Though I was never hungry, I felt. Chris on his low- fat diet. He never felt full, so was constantly. There was one saving grace. And I also had a pretty good reason to persevere: I really thought. I'd end up slim and healthy a month. That's because the logic underpinning low- carb diets seems. The thinking is that carbohydrates raise your blood. Insulin is the hormone needed to lower blood sugar, but it has another effect: it's a growth hormone. It makes your body convert sugar to fat and makes that fat hard to use as a source of energy. Chris van Tulleken, Amanda Ursell (Nutritionist setting up diets) and Alexander at table of food detailing what they can and can't eat on their diets. This. can lead to what's called metabolic syndrome, a combination of. This, in turn, raises your risk of type 2 diabetes. This. insulin hypothesis - that the key cause of people getting fat is. They make. you fatter and more likely to die of heart attacks. Conversely fat - . Well- respected. scientists will tell you that if you cut out carbohydrates (thus. These scientists believe reducing our sugar intake is the only way to solve the obesity epidemic. But. as our results show, it's a bit more complicated than this. Chris and I. each lost weight on our diets - I lost the most, a remarkable 9lb in. One. of the words you hear a lot when people talk about very low- carb diets. This is where your body makes chemicals called ketones. He never felt full, so was constantly. While I wasn't distracted by hunger for. I felt thick- headed, and this was most evident in a stock. Chris. We started with . The same was true for my physical performance. We spent a day with Nigel Mitchell, the head of nutrition at Team Sky Cycling. Over. a series of tests - all of which involved needles and long sessions of. Again Chris thrashed me in. So, even though I seemed to be losing more weight, everything became harder to do. And. the tests we did to assess our levels of blood fats and risk of. While it was getting some energy from the protein in my diet, some was probably also coming from breaking down my own muscle. Our experiment showed that you can lose a lot of weight, as I did, on a low- carb diet, but that isn't necessarily good for you. You. can lose weight on a low- fat diet, as Chris did - but over the long. The most interesting thing we found was that we were. It's not which is worse for you, fat or. Alexander and Chris eating the foods they missed most after the end of their diets. The insulin hypothesis sounds scientific, but it doesn't explain. For any diet to work you have to be able to keep it up for. I thought I would stick to low carbs after we. I had been. under- performing in all areas of my life, and I'd felt dreadful. The diet industry is polarised around simple debates such as fat vs sugar because there are huge amounts of money at stake. Farmers. food manufacturers, lobbyists, scientists and authors of diet books. Fortunately, you don't need to worry. What we discovered is that the real reason we're all getting fatter isn't fat or sugar. Furthermore. sugar alone isn't very addictive - only horses snack on sugar cubes and. And fat isn't really addictive either: when did you last sneak a spoonful of butter from the fridge late at night? The. modern processed food industry knows this and that's why you're rarely. We. interviewed some amazing scientists who showed us that a combination of. Remove either and your tub of ice cream will be a lot less appetising and a lot less addictive. It'll have fewer calories, too. What we relish is fat/sugar combinations - chocolate, ice cream, French fries. To see the effect of these combinations on the brain - and why they might be addictive like cocaine - after the diet part of our experiment finished, I had an eye scan done by Jennifer Nasser, a nutrition professor at Drexel University in the U. S. This scan effectively detects dopamine, a neurotransmitter that activates the reward centres of the brain. I was scanned while I ate fatty, sugary foods: sure enough a huge surge of dopamine. So. what were our conclusions? If you want to lose weight it will be much. These foods. affect your brain in a completely different way from natural foods and. And any diet that eliminates fat or sugar will be unpalatable, hard to sustain and probably be bad for your health, too. Sugar v Fat on BBC2 tomorrow at 9pm.
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