Nigel Leeming Posted January 27, 2014 Share Posted January 27, 2014 Wow - the brain needing 100g sugar per day means I must have died yesterday on my 3 cups of sugarless coffee and a slim-a-soup! Let me check a moment ........... No, I'm still here. What the brain needs is the equivalent in calories of 100g of sugar, which is 400 calories per day. Those calories can come from any type of food: Carbs (sugars, starches etc) are converted to glucose then to TCA.Fats are oxygenated (that's why we breathe) and converted to acetyl-CoA and then to TCA.Proteins are de-nitrogenated (if that's a word) and then either deaminated or transaminated (depending on the amino acid) and then converted to TCA. So the sugar thing is a simplification, as all food sources are ultimately converted to TCA before being used for energy. Google the Krebbs cycle. [i've edited this as I was wrong about everything going through glucose to get to TCA.] Link to comment Share on other sites More sharing options...
Connor Davies Posted January 27, 2014 Share Posted January 27, 2014 Google Glucose, Glycogen (chains of glucose molecules used to store energy in muscles and liver) and ATP to try and understand the cycle.No thanks, I've tried that once already. >.< Link to comment Share on other sites More sharing options...
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