When to take Glutathione
Also known as GSH, Reduced glutathione, Liposomal glutathione
Glutathione can be taken at any time of day, because no study has compared one time with another. Studies gave it every day for 1 to 6 months, so taking it daily matters more than the hour.
Last reviewed October 13, 2026
Timing
| Best time | Any time of day |
|---|---|
| Food | With or without food |
| Fat-soluble | No |
- Any time; consistency matters more than timing.
- In one 4-week trial, people took 500 mg capsules 15 minutes before breakfast and dinner.
- Stomach acid can break glutathione down. That is why some products use a liposomal form, which wraps it in tiny fat bubbles.
- In a 6-month trial, blood levels went back to where they started about a month after people stopped taking it.
Check with your doctor first if…
- Side effects in one trial were mild: gas or loose stools in a few people and flushing in two.
- Pregnancy or breastfeeding: the studies only included healthy adult volunteers. Ask your doctor first.
- Results are mixed. One 4-week trial found no change in glutathione levels, so it may not help everyone.
Amounts studied
250 or 1,000 mg/day of capsules for 6 months; 500 mg twice a day for 4 weeks; 500 or 1,000 mg/day of liposomal liquid for 1 month.
Follow the serving size on your product’s label.
What the research says
| Area | Evidence | Summary |
|---|---|---|
| Body glutathione levels | Limited | In a 6-month placebo-controlled trial of 54 healthy adults, 1,000 mg a day raised glutathione in blood cells by about 30 to 35%. Levels fell back after people stopped.[1] |
| Antioxidant support | Limited | A 4-week placebo-controlled trial of 1,000 mg a day in 40 healthy adults found no change in glutathione or oxidative stress markers.[2] |
| Immune function | Limited | In the 6-month trial, the activity of natural killer cells (a type of immune cell) more than doubled at 3 months in the 1,000 mg group, measured in a subset of people.[1] |
Questions
When is the best time to take glutathione?
No study has compared morning and night. One trial used doses 15 minutes before breakfast and dinner. Taking it every day matters more than the time.
Does oral glutathione actually get absorbed?
The research is mixed. A 6-month trial found that daily capsules raised body levels, but a 4-week trial found no change. Longer use may matter.
Liposomal glutathione vs regular capsules: which is better?
Liposomal forms wrap glutathione in tiny fat bubbles to protect it from stomach acid. A small study of 12 people taking liposomal glutathione saw blood levels rise within 2 weeks, but it had no placebo group. So it does not prove the liposomal form works better.
How long does glutathione take to work?
In the liposomal pilot study, blood levels peaked around 2 weeks. In the 6-month capsule trial, levels rose over 1, 3 and 6 months and fell back about a month after stopping.
Can I take glutathione every day?
Studies gave it daily for up to 6 months in healthy adults, and side effects were mild, like gas or loose stools. Ask your doctor if you are pregnant, breastfeeding or take medicines.
Plan your whole routine
Add Glutathione and everything else you take to the planner to see your morning, midday and evening, and what to keep apart.
Open the plannerFrom AT2A
Sources
- Randomized controlled trial of oral glutathione supplementation on body stores of glutathione (Eur J Nutr, 2015), Penn State University research portal (accessed October 13, 2026)
- Effects of Oral Glutathione Supplementation on Systemic Oxidative Stress Biomarkers in Human Volunteers (J Altern Complement Med, 2011), PMC (accessed October 13, 2026)
- Oral supplementation with liposomal glutathione elevates body stores of glutathione and markers of immune function (Eur J Clin Nutr, 2018), PMC (accessed October 13, 2026)
These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. It is general information, not medical advice: talk with your doctor or pharmacist before starting a supplement, especially if you are pregnant, breastfeeding, take medicine or have a health condition.