The good news is that your body produces its own glutathione. The bad news is that toxins from our life can deplete your levels of glutathione. Depletion of glutathione can be caused by poor diet, environmental pollution and toxins, many medications we take long, high levels of stress, any trauma our body has gone through from physical to emotional, general aging process, and infections.
This then leads to cell disintegration from oxidative stress and free radicals in our bodies.
The main ones in the diet are garlic, onions and the cruciferous vegetables like broccoli, kale, cabbage, cauliflower, and watercress
Eat lots of Cruciferous vegetables