Read the rat studies "Rats received a daily 5–10 g/kg dose of their respective ketone supplement via intragastric gavage (force feeding by gastric tube)during treatment." A 50 kg person would need 250 to 500 g (.5 kg) of exogenous ketones each day, not just the small amount of ketones a liver releases from ketosis.

If one is to do this with a ketogenic diet, it requires a total dietary commitment for 7 days just to start ketosis.

Consuming exogenus ketones bypasses ketosis. But, at $60 for 30 servings of 4 grams each, it would cost $120 per day to get to 240 grams.

Rat studies are interesting but the fine details are very important.

The problem with keto diets is the promoters take a few comments from a study and make a mountain of claims. The promoters all have something to sell.

btw, Most of the concussion studies show the same thing. The therapeutic time is the first 48 hours. The rat study looked at prepping the rats with exogenous ketones before the impact and immediately after the impact. Most studies show limit value to these protocols after the first 48 hours or so. Reducing the negative dietary ingredients so as to not hamper healthy brain metabolism is still valuable.

We must remember, concussion is a process, not an event. Interupting the process in the first day is important.

But, if you commit to a keto diet with passionate beliefs, there is evidence that placebo effect can enhance any natural healing processes.