The absolute difference in concentration between baseline value and each time point was computed for each glutathione parameter
While some people report subtle changes in energy or mental clarity within the first week, most clinical studies and anecdotal feedback suggest that it takes 4 to 8 weeks of consistent use to see significant results
While you can supplement with a bit more than this (many supplements have 15 to 30 mg), you should not exceed the tolerable upper intake of 40 mg per day from food and supplements combined, unless supervised by a doctor
Runhaar, J., Deroisy, R., van Middelkoop, M., Barretta, F., Barbetta, B., Oei, E