Oh my god, the never ending sugar non-sense.
https://cowseatgrass.org/2016/02/12/sugar-feeds-thyroid/ http://raypeat.com/articles/articles/sugar-issues.shtml
https://cowseatgrass.org/2016/02/12/sugar-feeds-thyroid/ http://raypeat.com/articles/articles/sugar-issues.shtml
Discussion, debate, close examination of results/methods, and the like are helpful. But calling out an entire research topic as "non-sense" holds back scientific progress, even if the research topic appears fruitless. Many of today's accepted truths were yesterday's non-sense.
People with a healthy metabolism can easily burn sugar for energy. Having a high metabolism increases the body's need for other nutrients, which are not present in white sugar. Sugar-rich foods, used in the context of a nutrient-dense diet, can be therapeutic.