A study conducted by Penn State Medical School has shown that taking a high dose of L-glutathione (1000 mg per day) did indeed increase blood levels by 35%.

It is true that our digestive system breaks down most of the ingested glutathione into the components glutamine, cysteine, and glycine. Furthermore, the tripeptide cannot be absorbed intact into the body’s cells. For this reason, L-glutathione supplements are considered an inefficient and expensive way to increase the body’s own glutathione levels. If you were to take the aforementioned high dose of 1000 mg of Maximised L-Glutathione 250 mg, which amounts to 4 capsules, it would cost as much as €4.85 per day.

Supplementing with N-acetylcysteine (NAC) is seen as a much more cost-effective and at least equally effective way to increase the amount of glutathione in the cells. An overview of NAC supplements can be found here:

https://www.vitaminstore.nl

Common recommended dosages range between 500 and 1200 mg of NAC per day. For example, Solgar offers NAC 600 mg (n-acetyl-cysteine), from which you can take one to two capsules daily.

In general, additional glutamine and glycine intake is not necessary, as the body already has sufficient amounts. On the other hand, additional glutamine intake may be desirable in certain situations (for example, in competitive sports). An overview of glutamine supplements can be found here:

https://www.vitaminstore.nl

Yes. The products contain ingredients that can be easily combined.