Welcome to the forum! This is a great place to be where you can get lots of information and support. One of the best places to start is the primer as KatieS mentioned. Here's the link again: viewtopic.php?f=33&t=1418
You can do specific search like cholesterol for example and you'll find great info.
Everyone's experience is different and you will see that here. Also, the primer takes you to places that really do help in reversing cognitive decline.
In addition to the forum, The End of Alzheimer's book came out. It's by Dr Dale Bredesen - a leading pioneer in the field. It is written for lay people and easy to understand. It's a real good thing that you've read Grain Brain by Dr. David Perlmutter. He is very knowledgeable too. If you're interested to know more about Celiac Disease, Dr. Tom O'Bryan (http://thedr.com
) is extraordinary. He translates the info to be readily understandable. The gut is really the 1st thing to work on!!
As for cholesterol, Dr. Terry Wahls explained that statins inhibit the remyelination of the Central Nervous System!. She is a researcher and work on a protocol similar to Dr. Bredesen but with least supplements. Food is still the 1st line attack and with the cron-o-meter application, it's possible to see the impact from what we eat: macronutrients, vitamins, minerals,etc.
Stil in the cholesterol topic, many functional medicine doctors recommend the LDL Small particle size numbers testing(NMR).
Congrats to you to be very active, work out and not overweight!
Remember that when the body heals, it heals everything!
I personally got off statins and glucophage ( for diabetes and cholesterol), lost 47 pounds in 2014, work out 4X/week and eat a lot of veggies everyday ( still do), got a new job and feel so much gratitude that even if I wasn't aware as now, my body and my mind just showed me that I took the right decision to change everything almost 4 years ago! I'm 60 now and I can follow very easily the 35 y/o guys in mountaineering for example or via ferrata in the Alps. My brain is 'sharp' and I know how it changed. And I was far from there before!
If it can cheer you up.