Great article! One thing I would add to it is about nutrient deficiency.
I've found that being deficient in a nutrient (or even multiple nutrients) is the cause for a lot of bad things - including bad short-term memory. A lot of times we aren't even aware that we're deficient, but many people have horrible diets so the deficiency isn't surprising.
In countries like Senegal and the Philippines, people regularly consume a plant called moringa to combat malnutrition/nutrient deficiencies, mood disorders, you name it. It sounds like something that would benefit us, regardless of the country we live in due to the quality of the average person's diet.
Moringa basically serves as a multi-vitamin, provided to us by nature, making it better than any lab-produced multi-vitamin you can buy at the store. A single moringa plant contains all essential amino acids as well as many non-essential amino acids, vitamins A & C, calcium, potassium, fiber...the list goes on. The leaves are the most nutritious part of the plant and can be consumed as a tea or used for cooking to mix in with what you normally cook.