Here's the comprehensive guide:

**Break Sugar Addiction**
* A highly cited study in the journal Neuroscience & Biobehavioral Reviews found that sugar meets the criteria for a substance of abuse and may be addictive to those who binge on it.
* Sugar affects the chemistry of the limbic system, the part of the brain associated with emotional control.
* Paul van der Velpen, head of Amsterdam's health services, warns that sugar is a drug, "just like alcohol and tobacco."
* The American Heart Association cites research that shows sugary soft drinks are responsible for 180,000 deaths worldwide each year.

**Sugar and Alzheimer's Disease**
* A new study theorizes that high fructose consumption may be a prime cause of Alzheimer's disease.
* Fructose can trigger a neural activity that leads to a foraging response that was important for survival but does not turn off in a modern world full of junk food.
* Recurrent fructose metabolism might lead to progressive brain changes seen in the development of Alzheimer's disease.

**Cerebral Fructose Metabolism**
* Fructose metabolism can lead to progressive brain changes seen in the development of Alzheimer's disease.

**Remove Foods That Cause Disease**
* A study published in 2014 in JAMA Internal Medicine found an association between a high-sugar diet and a greater risk of dying from heart disease.
* People who got 17% to 21% of their calories from added sugar had a 38% higher risk of dying from cardiovascular disease compared with those who consumed 8% of their calories as added sugar.

**Foods That Improve Cognitive Thinking**
* Blueberries, strawberries, cherries, rosemary, cinnamon, sage, turmeric, cumin, coconut oil, coffee, fatty fish, nuts, eggs, folic acid, whole grains, dark chocolate, avocado, beans and legumes, pumpkin seeds, chia seeds, flax seeds, sunflower seeds, B-12 complex, vitamin E in food (not supplements), sativa, lion's mane, lutein, zeaxanthin, blackcurrant juice, agaricus bisporus, cruciferous vegetables

**Foods That Decrease Cognitive Thinking**
* Aspartame, white food (bread, pasta, cakes), beer, processed meats (bacon, smoked turkey), microwave popcorn, processed cheese (Mozzarella, cheez whiz), sugars (insulin resistance), diet soda/sodas (aluminum), fluoride (added to drinking water), mercury (vaccines), high fructose syrup (smoking), nicotine (trans fats), margarine and frosting (French fries), doughnuts ("silver-filling" / tooth fillings are toxic)

Remember to always consult with a healthcare professional before making any significant changes to your diet or lifestyle.