KLOW Peptide: Ingredients, Evidence, Cost and Dosage Facts

Research use only. Nothing on this page is medical advice, and no seller’s KLOW is approved for human use.

KLOW peptide is a blend of four research compounds: GHK-Cu, BPC-157, TB-500 and KPV. It is sold as an 80 mg vial in a 50/10/10/10 mg ratio. No study has tested the blend, no amount to take per day or per week has been established, and FDA has not approved it. List prices run from about $70 to $215 per vial.

Ingredients

GHK-Cu, BPC-157, TB-500 and KPV

Ratio per vial

50 / 10 / 10 / 10 mg, 80 mg in total

FDA status

Not approved. All four ingredients are on FDA’s withdrawn-nomination list for compounding

Trials of the blend

None

Established amount to take

None

List price, 80 mg

About $70 to $215 depending on the seller

Banned in sport

Yes. TB-500 and BPC-157 are named on WADA’s 2026 List

Where to buy KLOW peptide

We picked sellers whose certificates name the lab, cover all four peptides and report contamination or identity testing. The tables further down compare the rest.

What is KLOW peptide?

KLOW is GLOW with one more ingredient. GLOW is GHK-Cu, BPC-157 and TB-500, and KLOW adds KPV. Sellers also call it the KLOW blend or KLOW stack, and some searches spell it “clo peptide”.

No study has tested the combination. The closest evidence is a 2026 rat Achilles tendon study in which BPC-157 and TB-500 together did no better than either one alone (8). GHK-Cu makes up 62.5% of the powder by weight, and because GHK-Cu is a copper complex a vial usually looks pale blue.

What is in a KLOW vial?

Each ingredient has human data in a different form: GHK-Cu mostly on the skin, BPC-157 in small uncontrolled reports, thymosin beta-4 in wound studies and KPV in mice. None of it tests the four together. Our list of peptides grades the evidence for 71 compounds.

How much KLOW peptide should you take per day or per week?

There is no established amount. No clinical trial has tested KLOW, so no per-day, per-week or per-injection figure rests on evidence. Sellers label every vial research use only and publish no directions, and the numbers on forums and vendor blogs are protocols that no trial has tested.

The vial can’t tell you either. Sellers’ own certificates show how far the contents drift from the label. In Luxe Peptides’ published reports, a Freedom Diagnostics test found 30.55 mg of GHK-Cu in a vial labelled 50 mg, and ten Janoshik lots ranged from 48.06 to 65.23 mg. An amount worked out from the label would be wrong for many vials.

How much KLOW peptide do you inject?

No injection amount has been studied for the blend. FDA says compounded BPC-157, TB-500, KPV and injectable GHK-Cu may carry immunogenicity risk and peptide-related impurities (2). If you’re considering any of these through a licensed route, a prescriber and a compounding pharmacist set the amounts, and FDA has noted that compounded products are overseen mainly by state regulators (9).

How much KLOW peptide per week?

No schedule has been studied either. The weekly and daily schedules on seller sites don’t come from trials of the blend.

How long does KLOW peptide take to work?

Nobody knows. No trial has measured the blend over time, so any timeline is a guess. The only timelines come from single-ingredient studies. The commonly cited topical GHK-Cu skin studies ran for about 12 weeks (10), and the BPC-157 human reports were uncontrolled, so they can’t separate the peptide from placebo or from time (4).

User reports of results within days are stories, not evidence. Diet, training and other peptides taken at the same time all change the outcome, and nobody is blinded.

How long is KLOW peptide good for after reconstitution?

No stability study of the blend exists, so the only guidance is the seller’s. Sellers advise keeping the powder cold and dark and the mixed solution refrigerated, and Luxe Peptides says to use reconstituted KLOW within 14 days. Throw out any solution that turns cloudy, changes colour or holds particles.

An unopened vial is good until the date or lot guidance on its label, and no independent shelf-life data exists for the blend. Our guide on how to store peptides covers storage in more detail.

How much does KLOW peptide cost?

An 80 mg KLOW vial lists for about $70 to $215, which works out to $0.88 to $2.69 per milligram. Several sellers run recurring sales of up to 50% off, so the price you pay is often lower. Sales change often, so check the seller’s page at checkout.

A low price tells you little. The next table shows how much of the contents each seller’s certificate actually accounts for.

Which sellers publish a useful KLOW certificate?

Only three of the eight sellers below weigh each peptide, and the lots they report don’t always match the label. A single purity figure such as 99.9% says nothing about how much of each peptide is in the vial: a vial could hold 70 mg of GHK-Cu and 2 mg of BPC-157 and still read 99% pure.

How to check a KLOW certificate

• All four peptides identified by HPLC retention time, mass spectrometry or another stated method.
• Milligrams of each peptide measured, not amounts calculated from the blend’s ratio.
• A lot number that matches your vial and a laboratory you can verify independently.
• Sterility, endotoxin and a heavy-metals panel, ideally ICP-MS, read before the purity number.

Our guide to verifying a peptide COA walks through the full process, and our best peptide vendors list compares more sellers.

Is KLOW supposed to be blue?

Usually pale blue, because GHK-Cu is a copper complex and makes up 62.5% of the powder. Blue shows copper is present. It doesn’t show that BPC-157, TB-500 or KPV are. A white powder suggests little GHK-Cu, and a green or brown tint, cloudiness or floating particles are reasons not to use a vial.

Is KLOW peptide approved or legal?

No. FDA has not approved KLOW or any of its four ingredients as a drug. BPC-157, TB-500, KPV and injectable GHK-Cu all sit on FDA’s list of substances nominated for compounding and since withdrawn from Category 2, the category FDA created for substances that may carry significant safety risks. FDA found no human exposure data for TB-500 or KPV (2).

In July 2026 FDA’s compounding advisory committee voted 8 to 6, with one abstention, to recommend BPC-157, KPV and TB-500 for the 503A bulks list. GHK-Cu wasn’t on the agenda. A physician interviewed by Healio said FDA staff recommended against all seven compounds the panel reviewed, and that formal rulemaking would run into 2027. The votes are advisory (9).

Research use only is the seller’s label. It doesn’t make the blend approved or safe for people. TB-500 is named on WADA’s 2026 Prohibited List under S2.3, BPC-157 is named under S0, and S0 bans any substance with no regulatory approval, which covers KPV and GHK-Cu (3).

KLOW vs GLOW vs the Wolverine stack

Is KLOW better than GLOW? Only if you specifically want KPV, and KPV has no human data. The extra 10 mg of KPV is the only difference between the two blends. Our full KLOW vs GLOW comparison covers the evidence and the vendors.

KLOW side effects and who should avoid it

The blend has no safety data, so everything below comes from the ingredients or from FDA’s concerns.

• Immunogenicity and impurities. FDA lists both as risks for compounded versions of these peptides (2).
• Blood-vessel growth. BPC-157, thymosin beta-4 and GHK-Cu are studied for promoting angiogenesis. One advisory committee member voted no on TB-500 partly because thymosin beta-4 has been linked to tumour progression (9).
• Copper. The 50 mg of GHK-Cu in a vial holds about 7.9 mg of copper. The NIH upper intake level for adults is 10 mg a day from all sources (11).
• Quality. The certificates above range from measured amounts to a single purity figure, and some lots are far off the label.

People who should avoid it: anyone with a current or past cancer, pregnant or breastfeeding women, people with Wilson’s disease or another copper-handling disorder, and tested athletes.

KLOW peptide FAQ

Keep researching: the full list of peptides, BPC-157, TB-500, KPV and the best peptides by goal.

References