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This effect may result from the promotion of healthy blood flow and oxygen supply to muscles along with the support of cellular metabolism [9].* Exercise is associated with an increased production of ROS that can promote tissue changes that support muscle adaptation to exercise, but that can also contribute to muscle damage and soreness [1012]

Or maybe its because NAC can help with glutamate in the brain (neurotransmitter)

He also coaches one-on-one in mindset and physical fitness as a qualified personal trainer

References Kimura H, Takeda K, Tsuruya K et al (2010) Left ventricular mass index is an independent determinant of diastolic dysfunction in patients on chronic hemodialysis: a tissue Doppler imaging study

The key components include vitamins A, B, C, D, E and potassium