Q: Sugar is essential for brain function, and you can’t live without it. So, why all the fuss about sugary foods? -- Dorothy R., Terra Haute, Indiana A: There’s a big difference between added sugars and those naturally found in fruits and grains. Added sugar is often engineered -- for example, high fructose corn syrup, added to prepared foods and snacks, is nowhere in nature! It causes impaired muscle function with insulin resistance, inflammation, high triglycerides, nonalcoholic fatty liver disease, increases your appetite and promotes obesity. And all added sugars -- sucrose, glucose, fructose -- add up to health woes. So can processed foods that remove fiber, like orange juice. A whole orange has 10-13 grams of sugar and lots of fiber; a 16-ounce glass of orange juice delivers 48 grams of sugar with no moderating fiber.