interestingly, the "International Scientific Association of Probiotics & Prebiotics" have an article published 2 weeks later called: "‘BRAIN FOGGINESS’ AND D-LACTIC ACIDOSIS: PROBIOTICS ARE NOT THE CAUSE" [0] along with letter to Nature mag: https://www.nature.com/articles/s41424-018-0057-9

[0] https://isappscience.org/brain-fogginess-probiotics-not-the-...