[kbrisso]

I'm 56 and have been experimenting with it. It definitely helps me stay laser focus on a task. I take between 10 to 15 grams a day in multiple doses. It does help with brain fatigue if you don't sleep well either. I'm also on keto diet and it helps me at the gym. Here is the thing everyone's DNA is different - keto works for me because I have tried it on and off. I have way more energy off carbs. I can also tolerate creatine, some people can't.

[pitched]

I’m still in the 30s but have found it to lower how much energy it takes to start something, rather than helping me stay focused. Same sort of idea, being in a higher-energy state, just pointing out that age doesn’t seem to be a requirement to get any benefit. I do also respond well the low-carb diets and heat that a lot from pro-creatine people so maybe there’s a connection to diet.

[mrsvanwinkle]

if it helps, i did keto fasting for weight loss monitored using a blood ketone meter, ate close to zero calories of korean konjac jelly and zero sugar drinks. and the drastic mental health benefit was a welcome surprise for me. even my physical energy felt infinite. but i experienced exactly what you described after hitting my target weight, very roughly at 15% body fat. at that point the fat burning noticeably slows down and my blood ketone levels drop. important to note that this is at a miraculously stable nondiabetic 70mg/dL glucose level, and zero intake of anything that may induce insulin production. a bite of chicken breast made me lose ketosis and felt the energy loss after a bit so there is that, the biggest confounding var will always be anything you eat that triggers insulin release that instantly halts ketosis, that can only be reactivated hours later. some other "paradoxical" benefit is control of appetite/absence of hunger pangs: https://brainresilience.stanford.edu/news/unlocking-secrets-...

[kbrisso]

The reason for the drop, I think you might be keto adapted. If you had < 20 grams of carbs you might be using all the ketones in your blood. If you can tolerate MCT oil you can use it as a ketone boost.