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GERD develops when this sphincter weakens or relaxes inappropriately, allowing stomach acid to irritate the delicate esophageal lining

Effects of delta-sleep-inducing peptide on 24-hour sleep-wake behaviour in severe chronic insomnia

The authors concluded that NAC resulted in improved performance suggestive of oxidative stress having a causal role in the fatigue process." Other studies have also confirmed that NAC supplementation helps delay muscle fatigue during exercise, thereby improving endurance

Potential side effects are minimal and may include mild skin irritation with topical use and injection site reactions with injectable administration