That is quite a list to keep track of. It seems quite a few of us are looking into protecting or improving brain function, so this could turn into a useful thread.
I've been thinking about a preventative brain protocol aimed at general health, TBI recovery, and lowering Alzheimer's or dementia risk. Here are my initial ideas for a stack: run cerebrolysin at 60 mg per day by injection for ten days once or twice a year, pausing other brain compounds during that time and for a week afterward, starting lower for the first couple days to check tolerance. The product comes from pig brain so it won't suit everyone. Add pinealon at 200-500 mcg daily under the skin for eight weeks, alone or paired with PE 22-28 at the same dose and schedule. Use semax or selank as a nasal spray once or twice daily. Dihexa looks interesting but I still need to sort out dosing and where to get it; maybe three days a week for ten to thirty days, repeated a few times a year. If carrying extra weight or dealing with metabolic issues, a low-dose GLP-1 weekly or a few times a week could help. Daily red-light sessions on the head for twenty to thirty minutes, sauna use combined with red light, and a daily curcumin product round it out.