Glutathione vs KLOW
Which should you choose? Here's what you need to know.
The short answer
Glutathione and KLOW are both immune / inflammation peptides, but they work differently. A tripeptide antioxidant naturally produced in cells. The body's master antioxidant, studied for immune support, detoxification, and skin brightening. A multi-peptide blend sold for gut and immune support. Composition varies between vendors — check the COA before comparing prices. Compare vendor pricing and availability below.
On 20 Sep 2026 Peptide Compare tracked 48 vendors selling Glutathione, cheapest in stock $0.025 per mg at Step One, and 44 selling KLOW, cheapest $0.875 per mg at Modern Research.
Glutathione
Immune / InflammationA tripeptide antioxidant naturally produced in cells. The body's master antioxidant, studied for immune support, detoxification, and skin brightening.
KLOW
Immune / InflammationA multi-peptide blend sold for gut and immune support. Composition varies between vendors — check the COA before comparing prices.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 20, 2026.
Glutathione
KLOW
$19.00
Starting from
$69.99
$0.64
Avg. price per mg
$7.20
48
Vendors selling it
44
45 options
In stock now
47 options
9.1/10
Top trust score
9.1/10
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.