Do BCAAs Make You Tired? The Surprising Truth About Supplements and Fatigue
                                
                                
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                                    4 min read                                
                            
                                While branched-chain amino acids (BCAAs) are widely used to reduce exercise-induced fatigue, some anecdotal reports suggest they might cause tiredness. The scientific explanation for this paradox involves the complex interplay between BCAAs, brain neurotransmitters, and competition for transport across the blood-brain barrier.