Using GABA and whey protein to build body mass in males
Supplementing with gamma-aminobutyric acid (GABA) and whey protein after resistance training helps males build fat-free body mass, according to the results of a new study.
Using 125mg of Pharma GABA (equivalent to 100mg of GABA), and 10g whey protein for 12 weeks, GABA was found to increase both growth hormone (GH) and protein synthesis, thus contributing to exercise-induced muscle hypertrophy .
GABA’s uses within the human body are varied, including it’s role as an inhibitory neurotransmitter, anxiolytic and relaxant via increasing parasympathetic nervous system activities [2-5] . However from a physiologic perspective, GABA controls the pituitary gland’s secretion of GH, thus having a key role in muscle growth [6, 7]. Furthermore, GH facilitates increased amino acid transport and cellular amino acid uptake .
In the single-blind, randomised and placebo-controlled study, 26 males were randomised into two groups, either whey protein (WP) only or WP + GABA. Resistance exercise was undertaken twice per week, with supplementation administered 15 minutes prior to training or prior to sleep on the exercise-free days .
Results at weeks 4 and 8 showed substantially higher resting plasma GH concentrations in the WP + GABA group compared to baseline. This was responsible in part for the significantly enhanced whole body fat-free mass in participants in the WP + GABA group versus WP alone .
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