What is happening. Both MitoQ and alpha-lipoic acid act as mitochondrial-associated antioxidants. Stacking multiple potent antioxidants that target mitochondrial ROS raises the theoretical concern of blunting beneficial redox signaling (mitochondrial biogenesis, insulin-sensitizing hormesis) when used at high doses, particularly around exercise where transient ROS drive adaptation.
Mechanism. Redundant antioxidant action on mitochondrial reactive oxygen species; excessive ROS suppression can attenuate hormetic adaptive signaling pathways such as PGC-1alpha-mediated mitochondrial biogenesis.
Recommendation. Combining them is not dangerous, but avoid stacking high doses of overlapping mitochondrial antioxidants without a clear rationale. If used together, keep doses moderate and consider timing antioxidants away from the immediate post-workout window if maximizing training adaptation is a goal.