I have been running KPV for three years and the honest summary is that the effect is smaller than the internet suggests and real.
Vivid dreams and mild headache for the first 13 days, then nothing. Textbook for this class, apparently.
My rule now: if a claim cannot survive being written down with the numbers attached, it is marketing.
Interested in the methods more than the conclusion.
How long before you can reasonably say something is or is not doing anything?
Narrow conclusion, briefly right. Broad conclusion, interestingly wrong. I know which I keep choosing.
How long before you can reasonably say something is or is not doing anything?
An inconclusive account is useful if it stops the next person mistaking a story for a controlled comparison.
Is a baseline blood test really necessary before starting something like this?
What is the first thing you would read if you were starting from zero?