It is made up of three amino acidsglutamine, cysteine, and glycineand plays a crucial role in: Protecting cells from oxidative stress Supporting immune function Repairing and rejuvenating tissues Maintaining healthy, youthful-looking skin However, glutathione levels drop due to ageing, stress, pollution, UV exposure, poor sleep, and lifestyle habits
The peptide glycyl-l-histidyl-l-lysine is an endogenous antioxidant in living organisms, possibly by diminishing hydroxyl and peroxyl radicals
and (2) indirectly, by powering antioxidant defenses that protect NO and hemoglobin from oxidative damage
104th Annual AATS Conference
A number of small, poorly controlled studies have reported that either acute (dose given one hour before exercise bout) or short-term (two to three weeks) supplementation with L-carnitine (2 to 4 g/day) supported energy production, cardiorespiratory fitness, and endurance capacity during physical exercise (reviewed in 129)