There’s a new clinical trial result showing that Bredesen’s approach is able to at least partially cure common forms of Alzheimer-like dementia. (Press release here). It has not received as much attention as it deserves.

The 9 month study seemed a bit less impressive than what I’d hoped for, but the outcomes still support the claim that common forms of dementia are partly curable.

Out of 25 patients, 21 or 19 improved their cognition compared to the start of the trial, depending on which measure I look at, and 2 or 3 declined.

Side effects included occasional improvements in hypertension and diabetes, enough to allow patients to stop taking medications for those conditions.

I’ve mentioned Blue Zones approvingly several times on this blog (here, here, and here).

Alas, there are reasons to doubt that they’re unusually healthy. The paper Supercentenarians and the oldest-old are concentrated into regions with no birth certificates and short lifespans makes a decent case that they’re mostly just areas where ages have been overstated. There are some relatively unhelpful arguments about who’s right on Andrew Gelman’s blog and on Bluezones.com.

As a consequence, I’m slightly decreasing my opinion of some foods that I was encouraged to eat by the Blue Zone memes: whole grains, beans, olive oil, and sweet potatoes. Sweet potatoes still seem likely to be quite healthy compared to the average American food, but I’m now uncertain whether they’re better or worse than the average paleo food (I previously considered them one of the best foods available). The rest of those foods seem no worse than the average American food, but I’m less optimistic about the safety of the average American food than I previously was.

I’ve also become less confident in the safety of a diet with less than 10% of calories from protein (Blue Zone Okinawans in 1949 got 9% of calories from protein), but I’d already decided not to pursue a low protein diet.

I’ve slightly decreased my opinion of Steven Gundry and Valter Longo

H/T William Eden.