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  Allow
                                             me to explain how sugar screws up this weight-regulatory system: that the sugar
                                             fructose is much different than glucose and fats—contrary to a calorie is a
                                             calorie.  Too much sugar
                                                is a poison—see
                                                Prof Robert Lustig MD.  We all need to know what has gone wrong so
                                             that we know the fix, and not follow fad fixes such as exercise more and eat
                                             less—the yo-yo diet.  There is science that
                                             proves where the harm lies and the fix to the weight-regulatory system.  You
                                             are not getting “a trust me, I’m an expert pitch”. 
                                             So bear with me while I will summarize (with links) the science.   
                                             
                                             
  First,
                                             a little carb basics:  Carbohydrates
                                             (carbs) is the umbrella term for sugar molecules that have a 5 or 6
                                             carbon-chain units. The most common unit is the 6-carbon glucose.  Most glucose
                                             is in chains called starches, of which for some we lack the enzymes to
                                             break them upon into glucose; they are
                                             fibers and cellulose.  Other
                                             common 6-carbon sugars are fructose
                                             and galactose.  There are several
                                             important disaccharides (2 sugar units), dextrose, maltose, lactose, and
                                             sucrose.  Sucrose (table sugar) is
                                             fructose and glucose.  Sucrose is rapidly converted in the stomach
                                             into single molecules for absorption in the intestines.  High fructose corn syrup
                                             (HFC 55) is 55%
                                             fructose and 42% glucose, thus essentially the same as sucrose—both are equally
                                             bad their fructose causes the havoc
                                             (glycation) because fructose exists longer in an open-reactive chain
                                             form.     
                                             
                                             
  You need not understand the process that caused
                                             the medical conditions:  just that there
                                             is good science, that the fix has a science foundation, and that food
                                             manufacturers oppose it.  The havoc starts with a double assault on the liver by fructose.  One arm of this assault is glycation, the random attachment of a simple sugar (monosaccharide)
                                             to
                                             a protein, which often hinders functions of that protein.  Think of oxygen which
                                             randomly attaches to
                                             iron--a bad thing.  “It appears that
                                             fructose and galactose [from milk, not cheese] have over in vivo [in the body] ten times the glycation activity of glucose, the primary body fuel” Wiki.  “Glycation is the first step in the evolution of these molecules
                                             through a complex series of very slow reactions in the body known as Amadori reactions, Schiff base reactions, and Maillard reactions; which lead to advanced glycation end products (AGEs).
                                             Some AGEs
                                                [Advanced Glycation End products] are benign, but
                                             others are more reactive than the sugars they are derived from, and are implicated
                                             in many age-related chronic
                                             diseases such as  cardiovascular diseases (the
                                             endothelium, fibrinogen, and collagen are damaged), Alzheimer's disease (amyloid
                                             proteins are side-products of the reactions progressing to AGEs),[7][8] cancer (acrylamide
                                             and other side-products are released), peripheral neuropathy (the myelin is
                                             attacked), and other sensory losses such as deafness (due to demyelination). This range of
                                             diseases is the result of the very basic level at which glycations [1]
                                             interfere with molecular and cellular functioning throughout the body and [2]
                                             the release of highly oxidizing side-products such as hydrogen peroxide” Wiki.  Since 99% of
                                             fructose is metabolized in the liver, it accumulates there. Thus, the liver is
                                             subjected to the most damage of any organ by glycation.   
                                             
                                             
  The second hit comes
                                             from fat accumulation in the liver.  When
                                             the liver is overloaded with glucose and
                                             fructose from a meal high in starches and sugars, they are converted to
                                             fats.  However, only 20% of glucose goes
                                             to the liver, compared to 99% of fructose, and glucose can be stored as
                                             glycogen and doesn’t cause harm. 
                                             However, fructose can only be converted to glucose and thus glycogen, but
                                             when there is no need, the liver converts fructose to fat (de
                                             novo lipogenesis).  Some fat is shipped
                                             off in the blood; however, some-to-most, depending on conditions, is stored in
                                             the liver.  The combination of damage
                                             from glycation to the liver cells (hepatocytes) and the excess fat in the liver
                                             cause chronic inflammation of the liver and a problem called insulin resistance in the liver. 
                                             When
                                             resistance to insulin occurs, more insulin is secreted by the pancreas and it
                                             goes to the resistant tissues to promote absorption and metabolism of glucose,
                                             to convert ADP to ATP, the energy molecule. 
                                             Insulin, to promote glucose metabolism, shuts down the metabolism of
                                             fat, and causes fat to be stored.  Thus,
                                             insulin resistance causes increased fat storage.  Insulin resistance in the liver
                                             produces
                                             gradually excess fat in the liver.  This
                                             is the second hit upon the liver.  Too
                                             much fat causes liver dysfunctions resulting in an inflamed liver and a medical
                                             condition called non-alcoholic fatty
                                             liver disease (NAFLD).  The
                                             extra 2 or 3 pounds of fat in the liver
                                             slows liver conversion of glucose, thus higher blood insulin.  Then extra insulin
                                             is secreted to lower blood
                                             glucose and this causes gradually insulin resistance in other tissues with its
                                             gradually accumulation of fat. 
                                             Note:  too much fat in the pancreas causes type-2 diabetes.  As
                                             just stated: insulin functions to cause the body to burn glucose and thus to stop burning fat and store it.  All this starts with the double
                                             whammy caused
                                             by too much fructose:  glycation and
                                             fatty liver.  The NHANES study in found in 1999 that over 30% of
                                             adults have excess fat storage in the liver (NAFLD), a serious medical condition that can
                                             progress to cirrhosis of the liver.  Major
                                             journal articles confirm
                                                all of this.  Prof Lustig MD  calls sugar
                                             (meaning
                                             its fructose) a poison
                                                comparable to alcohol, both cause a fatty liver and cirrhosis of
                                             the liver. 
                                             
                                             
  It not the sugar
                                             glucose, but fructose half, that is poison. 
                                             The Orientals on a traditional diet do not have a weight problem:  their
                                             diet is high in refined carbs (glucose);
                                             many of them have over 70% of calories from white rice, yams, and noodles; but
                                             only 15gm of sugar daily (vs our 124 gm). 
                                             On their traditional diet, they are among the healthiest people.  Also
                                             experiments comparing high fructose to
                                             high glucose confirm the role of fructose alone.  Nor is natural fats an issue[1]:  Eskimos lack in their climate grains and
                                             vegetables.  Add sugar to their diet
                                             along with traditional starches and they get the Western health issues.  Unfortunately,
                                             those with health issues
                                             simply can’t fix the problem by avoiding sugar, no more that avoiding oxygen
                                             fixes a rusty tool.   
                                             
                                             
  The fix is two-fold:  to
                                             end insulin resistance and turn off the weight regulatory system which
                                             functions to restore the fat level and increase weight.  A low-calorie diet will
                                             not burn the liver fat
                                             and thus lower the insulin level in response to glucose to its normal level and
                                             keep it there, nor fix the weight regulatory system--avoid the yo-yo diet.  One
                                             reason is that for those who have kept
                                             their weight on for a couple of years,
                                             the system has reset to the new weight. 
                                             Hormones mainly secreted by the adipose (fat) tissue function to restore
                                             their weight, even years later.  Many
                                             hormones are involved in this control; a major player is leptin, which is produce by the fat (adipose)
                                             tissue.  On an energy-restricted diet a
                                             delayed-reaction occurs after 2 months, leptin will cause a 25% reduction in
                                             metabolism, which makes the dieter tired and thus moody, bored, mentally
                                             sluggish, and creates the feeling that to eat more will make that person feel
                                             better.  Even after the diet end, years
                                             later, the leptin-system functions to restore the fat tissue to its former
                                             level.[2]  Nature
                                             has supplied a way to end-run these systems. 
                                             It process is a bit complex, but the solution is simple.   
                                             
                                             
  When insulin is low as when sleeping (no glucose), the body
                                             metabolizes fats for energy (ATP).  Some
                                             thought that by avoiding glucose (carbohydrates) during the day that insulin
                                             would remain low and the dieter would stay in the fat burning mode.  This is
                                             the ketogenic diet popularized by Dr. Atkins. 
                                             A good idea shot down by a complex
                                             system.  Since proteins through hormones
                                             incretins cause insulin
                                             secretion, thus ketogenic
                                             diet, like the calorie restricted diet, runs into the leptin energy reduction
                                             at 2 months; thus the ketogenic diet faces the same obstacle that
                                             simply
                                             eating less has, they will not keep the dieter in the fat burning mode, and the
                                             leptin system will cause the yo-yo diet for most on a ketogenic diet.   
                                             
                                             
  Now for the good news, when
                                             we are sleeping the small store of
                                             glucose & glycogen is burnt, than the body switches to metabolizing stored
                                             fat.  By not eating when getting up, fat
                                             burning continues—this is the short-term fast. 
                                             Mammals have evolved a system that promotes survival during periods of food
                                             shortage.  That is why the reduction in
                                             metabolism is delayed 2 months.  But by
                                             fasting, preferable alternate day fasting, the drop in metabolism doesn’t occur
                                             at 2 months.  And it gets better:  to
                                             promote hunting and gathering, when out of
                                             glucose and protein from not eating, man burns fat with an increase in the
                                             production of the energy molecule ATP of 10% above that under a normal diet—yes
                                             more energy than normal.  Secondly, the
                                             energy and mood elevating catecholamine hormones dopamine, adrenalin and
                                             noradrenalin are increased, and also the growth hormone HGH.  Other than mild
                                             hunger, the person without
                                             food after awaking feels better than if he had a breakfast without
                                             caffeine.  And it get better, studies
                                             show that by missing a meal or two, the daily calorie intake goes down, and
                                             even more with alternate day fasting.  The
                                             scientific literature is clear on this fix.  For
                                             those who are obese or have type-2 diabetes alternate day fasting is best.  In addition, to reduce insulin, replace carbs
                                             with fats, and eat moderate protein (25-30 grams a day).  For those who need
                                             to just lose some pounds, simply
                                             skip breakfast--link for advice
                                                on fasting.  Fasting eliminates the
                                             excess fat in the liver to cure insulin resistance, the cause for obesity, and the
                                             excess fat in the pancreas to cure type-2 diabetes.  Bariatric
                                                surgery cures type-2 diabetes because they fast following surgery, so too
                                             does alternate day fasting—Dr.
                                                Fung.   
                                             
                                             
  I have prepared a number of papers on what to eat, and
                                             fasting.  There are five recommended
                                             diets depending on the health situation at Cleansing Diet and what to eat, and much more at its long version, and a guide at fasting is easy. There are many other benefits from a low
                                             sugar diet since, as mentioned above the high fructose diet through glycation
                                             and RAGE is the most significant causer for age related degenerative
                                             diseases.  If you want to know more, then
                                             go to my website and use the internal Google Search Engine
                                             to read the journal articles and my articles with links to them.  You should
                                             watch the documentaries and
                                             lectures on YouTube. I have a video
                                                page on my site which has links and a description of the best of
                                             those
                                             documentaries and lectures on diet, type-2 diabetes, CVD, bad pharma, and other issues related to
                                             health.  Drs. Lustig and Fung confirm my
                                             presentation. For inspiration, I recommend reading the testimonial by Reyn’s wife on her very ill husband. 
                                             As recommended by Dr. Fung, Reyn did
                                             alternate day fasting with a very low carb diet replaced with natural fats (not
                                             vegetable oils), and from near death he regained his health.   
                                             
                                             
  Nothing is simple about our biological systems.  Without understanding
                                             the systems, we find
                                             that all diet works for a while because people eat less, but they fail for
                                             those with long-term weight problems, often years after they wrote a testimonial.  Fasting
                                             for most will produce long-term
                                             results.  It is easier than you think,
                                             and it lowers the risk for the age related degenerative diseases, including cancer, and Alzheimer’s disease. Fat metabolism makes creates the
                                             healthful beta
                                                hydroxybutyrate.  Low sugar and
                                             high
                                             fat (coconut oil is best) diet will undo the damage as new cells replace the
                                             damage ones.  Follow the science, please. 
                                             
                                             
  
                                             
                                              
                                             
                                             
                                             
                                             
                                             
                                             [1]
                                             Trans fats and vegetable oils are not natural fats, both are made by food
                                             manufacturers, and they damage the liver & more.     
                                             
                                              
                                             
                                             
                                             
                                             [2]
                                             All this with journal references is laid out in 2016 books by Dr. Jason Fung, The
                                             Obesity Code, and The Complete Guide
                                             to Fasting. 
                                             
                                              
                                             
                                              
                                             
                                              
                                              
                                           
                                          
                                          
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