@emo Again, your input is valuable, and thanks for the link to Nature, quite a comprehensive study. Regarding side effects, I've had a few, and always a surprise to my doctors, since "no one else has reported that". And yes, brain fog has been a big issue, it waxes and wanes with my general exhaustion level. I will check with SRA lab re the trial and keep reporting back. We do need fortitude, also patience and persistence. Onward!