Don’t worry, glutathione is relative abundance in our daily foods such as fruits and vegetables. Dairy products, cereals and breads are generally low in glutathione, fruits and vegetables have moderate to high amounts of glutathione and freshly prepared meats are relatively high in glutathione. Other than that, it should be noted that cruciferous vegetables like broccoli, cauliflower and cabbage or sulphur rich food like garlic and onions contain a lot of glutathione building blocks – sulphur and it is thought that they could increase glutathione levels. So don’t you worry, as long as you are having variety of fruits and vegetables in your balanced diet, you are getting enough glutathione.
However, in case you don’t, there are always glutathione in supplement form. Oral glutathione supplements are normally L-glutathione and would be digested to three peptide precursors (cysteine, glycine and glutamic acid). It is also available in the form of N-acetylcysteine (NAC) that is cheaper, that may provide the cysteine needed to raise glutathione level in body, however, it comes with higher effective dosage.