However, sustained high doses, overdose, fasting, alcohol use, or pre-existing liver disease can overwhelm glutathione reserves, increasing risk of hepatotoxicity and oxidative stress
Those who wish to maintain overall health and anti-aging benefits
Glutathione naturally brightens by reducing excess melaninno bleaching involved
Other factors, including tobacco smoke, pollution, unbalanced diet, genetic inefficiencies, and use of prescription and/or over the counter drugs (most notably acetaminophen) can further compound this loss. From Centre dEnseignement et de Recherche en Nutrition (CERNh)
However, the optimum method for sample preparation differs from sample to sample, so please review the references
Annu Rev Plant Biol 50(1):4765