KLOW80 is a blend of four peptides: GHK-Cu, BPC-157, TB-500, and KPV. The name usually refers to an 80 mg vial containing all four. If you’re comparing it with GLOW, the main difference is KPV: it’s the extra ingredient in KLOW.

That makes the name less mysterious, but it still leaves a few useful questions. What are the ingredients, why do people connect them with skin and recovery, and what changes when they’re combined?

What’s in KLOW80?

A commonly listed formulation contains 50 mg of GHK-Cu, plus 10 mg each of BPC-157, TB-500, and KPV. The 80 mg is the combined content of the vial, not an amount to use at once.

Here’s what those names mean:

  • GHK-Cu is a small peptide bound to copper. “Cu” is the chemical symbol for copper; this is the ingredient you may recognize from copper-peptide skincare.
  • BPC-157 is a peptide made of 15 amino-acid building blocks. It’s the one most closely associated with discussions of joint pain and injury recovery.
  • TB-500 is a name used for a short fragment of thymosin beta-4. The fragment and full-length thymosin beta-4 are different substances, although the names often get mixed together.
  • KPV gets its name from its three amino acids: lysine, proline, and valine. It has been investigated for inflammation in cells and mouse models, including inflammation in the gut.

KLOW vs. GLOW: what changes?

In the formulation above, GLOW contains GHK-Cu, BPC-157, and TB-500, totaling 70 mg. KLOW keeps those amounts and adds 10 mg of KPV, bringing the total to 80 mg.

So KLOW isn’t simply a stronger version of GLOW. The extra amount comes from another ingredient; it doesn’t mean there’s more of each of the original three.

These are blend names, so the actual ingredient list matters more than the shorthand. “80 mg” tells you the total on the label, while the individual amounts tell you how that total is divided.

Why skin and recovery come up together

The ingredients bring different associations to the same product. GHK-Cu appears in topical skincare research, while BPC-157 appears in early work on knee pain. KPV adds interest around inflammation. It’s easy to see why one blend gets discussed across several different goals.

Those connections haven’t established that KLOW80 heals injuries or improves skin in people. Safety is uncertain too: the FDA flags limited human safety information for BPC-157 and injectable GHK-Cu, including potential immune reactions, and reports no identified human exposure data for KPV or the TB-500 fragment. Copper-peptide skincare findings don’t make an injected blend equivalent to a cream.

Four small blue panels beside one larger outlined panel on a dark blue background, a conceptual illustration of separate ingredients and a blend.

One blend means a fixed mix

The practical difference between a blend and separate products is that the blend’s ingredients come together in fixed proportions. You can’t change just the GHK-Cu or leave out KPV while keeping the same mixture. Separate products keep those ingredients independent; combining them removes that flexibility.

This also matters when you keep track of what’s in a vial. A single entry saying “KLOW80” hides four ingredients, and the total isn’t the amount of any one of them.

PepNote lets you enter each ingredient and its labeled amount under the vial’s blend contents. You can then see the breakdown together instead of trying to remember what sits behind the blend name.