In fact, it is possible that the BCAA
drink is less effective than the full
tyrosine-free amino acid mixture in acutely
reducing the symptoms of mania. In the
current study the people treated with BCAA
showed a decrease in ratings on the Beigel
scale that was about 20% greater than that
of the placebo group. This is somewhat less
than the 35% reduction in symptoms seen
in our previous study (McTavish et alet al,
2001).