Journal of the COPD Foundation Antioxidants and Chronic Obstructive Pulmonary Disease Effect of high dose N acetylcysteine on exacerbations and lung function in patients with mild to moderate COPD: a double blind, parallel group, multicentre randomised clinical trial Nature Communications A Cystine Rich Whey Supplement (Immunocal) Delays Disease Onset and Prevents Spinal Cord Glutathione Depletion in the hSOD1G93A Mouse Model of Amyotrophic Lateral Sclerosis PDF) Cysteine cystine rich undenatured whey protein supplement in patients' pressure ulcers outcomes: an open label study