Fatigue, weakness, slowness is a problem for pwp's. A protocol for chronic fatigue syndrome lists a French Oak Extract containing roburins as part of a treatment :
lifeextension.com/protocols...
lifeextension.com/magazine/...
User reviews for a supplement containing the French Oak extract are not overwhelming (3 out of 5 stars from nine reviewers at Swanson). A company called Robuvit distributes the raw materials to supplement manufacturers. Scientific footnotes here:
Just wondering if anyone has tried this supplement.