“Men who consumed 67 grams or more of sugar per day were 23% more likely to be diagnosed with depression in a five-year period than men who ate 40 grams or less,” according to an article in Forbes. the five-year study did not directly prove that sugar causes depression, but the 23% difference was significant nonetheless.

In another study published in The Telegraph, sugar was linked with Alzheimer’s. Bath University researchers discovered that sugar affects the body’s response to inflammation, which occurs in the onset of Alzheimer’s disease.

And a 2015 study at Oregon State University revealed that high fat and high sugar diets affect bacteria associated with loss of memory.