“In MCI subjects, although there was no significant difference between the H2- and control groups in ADAS-cog score after 1 year, carriers of the apolipoprotein E4 (APOE4) genotype in the H2-group were improved significantly on total ADAS-cog score and word recall task score (one of the sub-scores in the ADAS-cog score).”
Longecity post regarding DIY hydrogen rich water; https://www.longecity.org/forum/topic/76459-dyi-hydrogen-water-sticks/#entry805702