Table 2.

Summary of the potential effects of l-Cys (alone) supported by studies based on clinical trials.

Examples of l-Cysteine Usage	Effects	Ref.
Nutritional therapy in children with severe edematous malnutrition	Restoration of the rate of synthesis and the concentration of glutathione during the first phase of treatment	[21]
Scarring of the cornea after a photoreactive keratectomy	Reduced average time of scarring	[22]
Nutritional therapy in Ictus patients	Reduced risk of cardiovascular accident	[23]
Hair care	Reduced hair loss and increased hair strengthening abilities	[16,24]
Protection of digestive system	Reduction in the concentration of acetaldehyde by avoiding exposure in cases of achlorhydria	[25]
Treatment chronic inflammation	Increased antioxidant status	[26]
Prevention of upper digestive tract cancer and breast cancer	Decrease of acetaldehyde in saliva or it can be used as part of metabolic starvation therapy	[27,28]
Indicator for the control of cardiovascular diseases	Pro-inflammatory signaling	[29]
Treatment of erythropoietic porphyria	Photosensitivity improvement	[30]
Treatment of type-2 diabetes	Control of glycaemia and vascular inflammation	[31,32,33]