If you really want the benefits of ketones, go on a ketogenic diet. Neuroprotection is its forte. See for example:

THE NEUROPROTECTIVE PROPERTIES OF CALORIE RESTRICTION, THE KETOGENIC DIET, AND KETONE BODIES

Neuroprotective and disease-modifying effects of the ketogenic diet

[T]here is evidence from uncontrolled clinical trials and studies in animal models that the ketogenic diet can provide symptomatic and disease-modifying activity in a broad range of neurodegenerative disorders including Alzheimer’s disease and Parkinson’s disease, and may also be protective in traumatic brain injury and stroke. These observations are supported by studies in animal models and isolated cells that show that ketone bodies, especially β-hydroxybutyrate, confer neuroprotection against diverse types of cellular injury.

Bruno,

In a desperate move I tried out the fried potato juice thing because of Dr. Peat. (I have been eating Peat style since August 2011) So, I ran out of soy-free eggs and was not a happy camper since I usually have them for dinner or use them in a dinner recipe. I have been avoiding starch because of Small intestinal bacterial overgrowth. Also the potatoes I had were starting to sprout. Basically: Potato juice sounded like a great solution. I was hungry, it might "cure" some of my gut issues, it was starch-free.

I don't have a juicer, so I peeled them then used a cheese grater. Then I used cheesecloth to "milk" the shavings. I ended up with a bowl of clear liquid. Then I heated up a frying pan with some butter. When I went to pour the liquid in there was still some liquid but a giant layer of "clay"-like near solid glop at the bottom of the bowl. I decided to put the whole of the contents into the pan.

It fried up gray, sticky, and gloppy. 5 giant potatoes made about 2 fried eggs sized portion.

It mostly tasted like butter and salt and had the consistency of chewy glop.

I felt sick as a dog after I ate it and bloated up like I had actually eaten all 5 of those potato's.

Failure. ICK!

I did try potato juice according to Ray peat. But i hated the taste of cooked juice. So i drank potato juice mixed with fruit juices. I drank no more than 200 ml. After making the juice i let it stand in a glass for 5 minutes and then throw away the starch sediments on the bottom. I felt great, that gave me an instant energy boost. But i think it also gave me slight stomach problem. I already have a very sensitive stomach. You have to be very very careful with how you choose your potato. Sprouted potatoes are full of poison. One should peeled the potato to remove most of the poison, solanin. We should not eat a potato if it has green patch or is sprouted. We also have to removes those eyes. Cooking does not inactivate this poison. I stopped making potato juice after reading that people died eating cooked potato. Poisonous potato usually tastes very bitter. So that is one way to understand if its ok to eat or not. I follow Ray Peats advice and he is an absolute genius. For Seneth, Ray Peat recommends a glass of water with 2+ table spoon of sugar and some salt to aid sleep. I tried it and its fantastic. I never thought sugar and salt can be a sleep cure.