I am 65.

20 years ago I am pretty sure I had declining cognitive functions. At the time I was a good research engineer, but actually I was morbidly obese, was unable to walk 2km (~1.2 miles).

Yet now I think I am better. What changed? I retired, move to an home in a nice rural setting and tried to improve my health through exercise and loosing weight.

I was not easy but I am now able to walk 20km (13 miles) (I even did a 33km round trip). I didn't regain ability to run more than one hundred yards though.

Another thing is try to improve your cardiovascular health, a stroke is something devastating.

Good luck!

Stop eating after 17:00-18:00 pm. If you need to eat, try a banana or a carrot, drink some wine or a beer. Walk a lot, read books or online books a lot.

It may or may not work but this was the best advice from a cardiologist when I was 38.

Get some sun [1]. Might not help, but I bet you’ll enjoy it all the same.

[1]: https://www.outsideonline.com/health/wellness/sunscreen-sun-...

Try assessing your Plasmalogen levels.

https://prodrome.com/blood-test/

Hearing very interesting (yet unpublished) results coming out of Dayan Goodenowe's trials of supplementing Plasmalogen precursors on Alzheimer patients. A lot of folks over at APoE4.info have been on the precursors for many months.

https://www.youtube.com/watch?v=mf1Q00QByIA

Try 2-3 gm of niacinamide (non-flushing Vit B3).

This vitamin keeps mitochondria happy.

Start slowly (1 gm/day) and after a month or two ramp up if all is good to 3 gm/day.

It is interesting that the amide form of nicotine is so essential for humans.

”In 1942, when flour enrichment with nicotinic acid began, a headline in the popular press said "Tobacco in Your Bread." In response, the Council on Foods and Nutrition of the American Medical Association approved of the Food and Nutrition Board's new names niacin and niacin amide for use primarily by non-scientists. It was thought appropriate to choose a name to dissociate nicotinic acid from nicotine, to avoid the perception that vitamins or niacin-rich food contains nicotine, or that cigarettes contain vitamins. The resulting name niacin was derived from nicotinic acid + vitamin.”

Get a TDAP shot. It's cheap, low risk, and might help:

SLU Study Finds Lower Dementia Risk in Adult Patients with Tdap Vaccinations

https://www.slu.edu/news/2021/may/dementia-risk-tdap-study.p...

Are you a mouse? In that case, you should indeed be worried. If not, just carry on doing what you've been doing.

In a reddit thread I read about the link between the gut biome and different diseases. Someone commented about custom probiotics and that they had seen improvements. They were in the US and they had used flore (I have no idea about them). I think it's worth a try.

> Have been taking D3 for over a decade.

Don't take junk headlines at face value. The paper is not very convincing.