Healthy Origins Setria L-Glutathione is the bottle we hand to most buyers who want a single-ingredient glutathione and don't want to get lost in the form debate. It is a full 500 mg of Setria — the named, clinically-referenced reduced glutathione made by Kyowa in Japan — in a vegetarian capsule, 150 to a bottle, at the lowest cost-per-day of any named-source pick on our list. For someone who trusts the slow-repletion reading of the evidence and wants a verifiable source, it's the rational default. We rank by form first, and that's where the honesty has to live: this is plain reduced glutathione, the version whose oral absorption is genuinely debated. Witschi 1992 found a single large oral dose didn't raise plasma GSH; Allen 2011 found 500 mg/day moved no biomarkers in four weeks; but Richie 2015 found that 250-1000 mg/day did raise body stores over six months. So this is a months-long repletion play, not an antioxidant infusion — and if that uncertainty bothers you, the liposomal and S-acetyl forms exist precisely as the hedge. Here's the full breakdown.
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Read the complete Glutathione guide →Plain reduced glutathione — the form with the most-debated oral absorption (Witschi 1992 negative on plasma, Allen 2011 negative on biomarkers; Richie 2015 positive on body stores over 6 months). The named Setria raw material lifts confidence in WHAT you're taking, but doesn't change the delivery route, so this caps below the liposomal and S-acetyl picks that exist to solve absorption.
500 mg per capsule sits squarely inside the 250-1000 mg/day range Richie 2015 used to raise body stores, and the label allows a second capsule to reach the 1000 mg high-dose arm. No under-dosing — this is a full, evidence-aligned plain dose.
Named Setria (Kyowa) source stated on the listing — the most verifiable claim in the reduced-form tier — plus a clean single-ingredient, gluten-free, vegetarian panel. Held just short of the top only because there's no independent NSF/USP seal called out.
At roughly $0.27 per 500 mg capsule, it's the lowest cost-per-day of any NAMED-source pick on the list, and the 150-count bottle is about a five-month supply at one a day. Only the unbranded bulk picks (Nutricost #8) beat it on raw cost-per-serving.
One vegetarian capsule a day, single-ingredient, easy to stay consistent with over the months repletion actually takes. The large bottle reduces re-order friction. Loses a touch only because it carries the plain-form absorption caveat into daily use.
“Contains genuine Setria branded reduced L-glutathione.”
The listing states Setria — Kyowa Hakko's named, pharmaceutical-grade reduced glutathione made by patented fermentation. This is the verifiable named source that distinguishes it from generic reduced-GSH capsules, and the reason it leads the reduced-form tier on transparency.
“500 mg of glutathione per capsule.”
A full 500 mg per capsule, which sits squarely in the 250-1000 mg/day range Richie 2015 (PMID 24791752) used. The dose is accurate and evidence-aligned for a plain oral GSH protocol.
“Oral glutathione raises your body's glutathione levels.”
Not reliably, and not quickly. Witschi 1992 (PMID 1362956) saw no plasma rise after a single dose and Allen 2011 (PMID 21875351) saw no biomarker change over 4 weeks; only Richie 2015 showed body stores rising — and that took six months at 250-1000 mg/day. 'Raises your levels' is unverified as a fast or guaranteed effect, though slow repletion appears possible.
“Supports antioxidant defenses and detoxification.”
Glutathione's biological role as the master antioxidant and a phase-II detox substrate is well established. The 'partial' is about delivery: that role only translates to benefit if the oral dose reaches your cells, which for plain reduced GSH is the debated step. Honest as biology, conditional as a supplement claim.
“Best-value, long-lasting supply.”
At ~$0.27 per 500 mg capsule with 150 capsules per bottle, it's the lowest cost-per-day of any named-source pick and roughly a five-month supply at one a day. The value-and-longevity claim holds up.
The single thing that separates this from a commodity reduced-glutathione capsule is the named Setria (Kyowa) raw material, stated on the listing. It's the most-referenced glutathione raw material in human research and — crucially — it's verifiable, where a generic 'reduced glutathione' is not. You're paying a modest premium over the cheapest unbranded capsules (Nutricost #8) specifically for that named, traceable source. If source transparency matters to you, it's worth it; if only cost-per-serving matters, the unbranded bulk picks are cheaper.
Set your expectations from the evidence, not the label. The only trial showing plain oral GSH raise body stores (Richie 2015) took six months at 250-1000 mg/day; the shorter four-week trial (Allen 2011) found nothing. So the right mental model is slow, cumulative repletion — which is exactly why the 150-count bottle is an asset: it lets you actually run the protocol long enough to matter. Judge it at the multi-month mark, not in week two.
We rank by form first, and plain reduced glutathione is the form whose oral absorption is most debated — which is why this caps at a 7.5 on the form axis despite the named source and full dose. The liposomal (#2, #3) and S-acetyl (#4) picks exist specifically to improve on that delivery step, and the liposomal route has the most human support (Sinha 2018). This pick wins overall on dose, value, and transparency; it does not win on absorption strategy, and we don't pretend it does.
A single 500 mg capsule lands inside the studied range and stretches the bottle to about five months — the consistency-friendly choice for a supplement that only works cumulatively. The label allows a second capsule, which moves you toward Richie 2015's 1000 mg high-dose arm if you want a stronger repletion push, but a missed second cap matters far less than skipping days. Pick the dose you'll actually sustain.
The honest comparison every glutathione buyer should make: NAC supplies cysteine and lets your body build its own glutathione, absorbs well, and usually costs less — sidestepping the very absorption debate that limits plain oral GSH. This Setria capsule supplies glutathione directly from a named source, which is what some buyers specifically want. Neither is strictly 'better'; it's a direct-supply-versus-precursor decision, and it's worth making deliberately rather than defaulting to whichever you saw first.
Healthy Origins Setria L-Glutathione is what we recommend to the buyer who wants a single-ingredient glutathione, a named and verifiable source, and the lowest running cost among named-source picks. It carries a full 500 mg of the clinically-referenced Setria material, the dose sits squarely in the studied range, and the 150-count bottle is big enough to run the months-long protocol the repletion evidence actually requires. Two honest qualifications decide whether it's right for you. First, the form: this is plain reduced glutathione, the version whose oral absorption is genuinely debated — Witschi 1992 and Allen 2011 found little to nothing short-term, while Richie 2015 found body stores rose only over six patient months. If that uncertainty is a dealbreaker, the liposomal (#2, #3) and S-acetyl (#4) forms exist as the hedge, with liposomal carrying the most human support. Second, the alternative: if cost is your real constraint and you mainly want to raise glutathione status, NAC is the cheaper precursor route worth weighing first. For everyone else — buy it, take one capsule daily, and judge it at the multi-month mark.
Check Healthy Origins · Setria reduced L-glutathione (Kyowa, Japan), 500 mg · 150 veggie caps on AmazonThe absorption hedge — Setria wrapped in a liposomal phospholipid complex, the cleanest practitioner-grade answer to the bioavailability debate. Pay more per serving to sidestep the plain-form caveat.
See it on the list →The budget version of the same idea — a clean 500 mg reduced capsule at the lowest sticker price, honestly NOT labelled Setria. The cheapest way to run the plain-form experiment.
See it on the list →Beats it on raw cost-per-serving — 240 generic reduced capsules at about a dime a day — if you've accepted the form debate and only care about cost.
See it on the list →6-month RCT: 250 mg AND 1000 mg/day oral glutathione raised body stores (blood, erythrocytes, lymphocytes) vs placebo. The repletion trial behind this 500 mg plain-form pick — but the effect took months, not days.
Single 3 g oral dose did not raise plasma glutathione in healthy volunteers — 'negligible' systemic availability. The origin of the absorption caveat that applies to every plain reduced capsule, Setria included.
500 mg twice daily for 4 weeks moved no oxidative-stress biomarkers and didn't change glutathione status — the short-term null result that means this pick should be judged over months, not weeks.
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