Glutathione vs NAD+

Both molecules fall as you get older, both turn up on the same wellness-clinic drip menus, and both get sold for the same reasonable complaint: you're tired, and you'd like your cells to behave. Glutathione is the dish sponge, three amino acids that soak up the reactive molecules normal life leaves behind. NAD+ is the rechargeable battery, the helper molecule your cells use to turn food into energy and to run their repair enzymes.

That's why the question usually isn't which one is better, it's which job you're trying to help. If you want skin that looks more even, or you like the idea of backing up your own antioxidant defenses, glutathione has the matching story. If it's the slept-fine-and-still-running-at-80-percent kind of tired, NAD+ is the one people reach for. Glutathione counts as a peptide, a very small one. NAD+ doesn't, it's a coenzyme, and it's tracked here because the same vendors sell it. It's the same midlife itch, scratched from two sides.

Where they part most is the evidence. Glutathione has several small human trials, mostly on capsules and liposomal liquid (glutathione wrapped in a fat layer so it survives digestion), which is unusual for anything sold by a peptide vendor. NAD+'s human studies are on two oral supplements your body turns into NAD+, nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR), and nobody has run a controlled trial of the injection. The longer versions are in is glutathione worth the hype and is NAD+ worth it.

Glutathione dosage chart by form dosage guide → · NAD+ dosage chart by form dosage guide →

Where these come from: the injected glutathione and NAD+ amounts come from peptide-information and compounding-pharmacy pages, with no controlled trial behind either. The glutathione capsule and liposomal amounts and the NMN and NR amounts come from published human studies. The units to draw and the vial math are on the glutathione dosage chart and the NAD+ dosage chart.

Both injected patterns have the same shape, two to three times a week, and the difference is size and shelf life: hundreds of milligrams against tens, and a mixed vial that keeps 28 days against one that keeps a day or two. The milligrams don't line up, and they aren't meant to. Glutathione's trial amounts are swallowed and the injected figures are per injection, so a bigger number on one side says nothing about which reaches your cells in greater quantity.

Wellness clinics list both on the same drip menus, and readers ask whether you can take glutathione and NAD+ together, a bit like ordering the second coffee before you've noticed what the first one did. The two do different jobs, one soaking up damage and one powering repair, so the logic of wanting both is easy to follow. What people do is run them as separate products, one for each job, and that's reported practice. No study or label tests the pair.

If you add two things at once and feel a flush, an upset stomach or a jittery afternoon, you won't know which one to thank or blame, so people tend to start one first.

1. Modern Aminos4000 mg · $69.00 $0.02/mg
2. Double R Labs1500 mg · $34.99 $0.02/mg
3. Flawless Compounds1500 mg · $37.95 $0.03/mg
4. Glow Aminos1500 mg · $37.95 $0.03/mg
5. Panda Peptides1500 mg · $40.00 $0.03/mg

1. Evolve BioPep500 mg · $30.00 $0.06/mg
2. Luvaminos1000 mg · $60.00 $0.06/mg
3. Solyn733.33 mg · $44.99 $0.06/mg
4. KAM Research Solutions1000 mg · $62.96 $0.06/mg
5. Simple Peptide1000 mg · $65.00 $0.07/mg

Compare both in the app. Both come in a wide spread of vial sizes, so the per-milligram number is the only one that holds up when you line two vendors next to each other. Glutathione vials run from a few hundred milligrams to several grams, so the sticker price tells you very little. Compare the real price per milligram, and look for a vendor that publishes independent purity and identity testing for the batch you're buying. Every vendor on PPL carries a confidence label, from High confidence to New vendor. Capsules and liposomal glutathione, and NMN and NR, are sold as ordinary supplements, so for those it's the bottle price divided by the milligrams inside.

Glutathione: the capsule trial ran 500 mg a day for six months and the liposomal study ran 500 or 1,000 mg a day for four weeks, without flagging a safety problem. Injection is less settled. In 2019 the FDA warned compounding pharmacies not to make injections from supplement-grade glutathione, after patients given it by IV had reactions, and in August 2026 two Texas pharmacies recalled glutathione injection vials after their own testing found elevated bacterial endotoxin, a contaminant from bacteria that clean technique can't remove. The trials didn't test it alongside other medications, and there's no trial data on pregnancy or breastfeeding.

NAD+: injected NAD+ has no long-term safety study in people. The report that comes up most is flushing, chest tightness, nausea or a racing heartbeat during or just after an injection, and people and clinics tie it to injecting too fast. A sting at the injection site is common too, and why NAD+ injections sting or flush covers what people do about both. There's no information on pregnancy or breastfeeding, and anyone being treated for cancer is usually told to ask first, because the repair machinery NAD+ feeds is active in tumors.

With either one, what's in the vial matters as much as the amount, since a research vial isn't made under drug-maker controls. A recent third-party certificate of analysis is the thing to look for, and how to read a COA walks through the document. The longevity and anti-aging page lists the other compounds people weigh for the same goal.

Glutathione capsules are sold as supplements and the vials are sold for research, and injected NAD+ is sold for research with no controlled trial behind it. You knew that, it's why you're reading this and not the label.