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10.1038/s41537-017-0013-9 201

When you ask, "Can you take glutathione and collagen at the same time?" you are essentially asking if you can combine a builder with a protector
The authors observed 2 weeks of oral supplementation of 133 mM/kg/d GLY and 081 mM/kg/d CYS restored glutathione synthesis, improved mitochondrial fat and carbohydrate oxidation, insulin sensitivity, body composition, muscle strength and dyslipidaemia

doi: 10.3390/medicina55050166