I have since found a protein powder that could be a combination of pea, hemp and brown rice proteins and it appears to work in avoiding the fatigue, and presumably the taurine deficiency.

Bannister AJ, Zegerman P, Partridge JF, Miska EA, Thomas JO, Allshire RC, Kouzarides T: Selective recognition of methylated lysine 9 on histone H3 by the HP1 chromo area.

cureus.comFor example