I am trying to do those same things, and started taking 5000 IU of D3 when I was surprised to find my level was borderline low.
The guy who wrote Grain Brain has a book out this year called Brain Maker about gut microbes and your brain - it makes a lot of sense. He (Dr. Pearlmutter) is also a big Vit D proponent!
I wish there was a Health Forum on Free Republic. I love these types of posts. I’m doing the D3 thing too after my doctor said I was low. He also took me off gluten and dairy after I had a bunch of blood tests, etc. I immediately felt better and my eyes weren’t all puffy, but discipline is not my middle name, and it’s always a battle.
I wish you all the very best, and I thank you for mentioning Dr. Pearlmutter. Our son [in the health food biz] has the book “Grain Brain,” but I’m not sure about “Brain Maker.” He eats probably 80% vegetables and fruits with the emphasis on vegetables. Never seen anything like it and he feels great. O-h-h, to be disciplined. .. =)
Let me know how you do with the D3 and if it raises your levels.