Peptides

GLOW and KLOW peptides explained: GHK-Cu, BPC-157, TB-500 and KPV

What the GLOW and KLOW peptide blends contain, what each ingredient is studied for, what the evidence does and does not show, and who should avoid them.

Published October 29, 20263 min readReviewed for clarity by the Awesentials teamEducational, not medical advice

GLOW and KLOW are two of the most-searched peptide names right now. Both are blends, and they share most of their ingredients. Here is what is inside each one, what the research looks at, and what it does not show yet.

The short version

GLOW combines three peptides: GHK-Cu, BPC-157 and TB-500. At Awesentials it comes as two vials, one with GHK-Cu and one with BPC-157 and TB-500 together.

KLOW uses the same three peptides and adds a fourth, KPV, all in a single vial.

Both are compounded by a licensed US pharmacy for an individual patient. Neither is FDA-approved, and both require an online visit with a licensed provider, who decides whether either one is appropriate for you.

GHK-Cu: the copper peptide

GHK-Cu is a tiny peptide (three amino acids) bound to copper. The body makes it naturally, and it is found in blood, saliva and urine. Levels are higher in young adults and lower later in life. Lab research and small studies of GHK-Cu creams look at its role in collagen and elastin signaling, skin firmness and the way skin remodels after injury. Most of that work is in cells, animals or topical products, not injections in people.

BPC-157: the most talked-about recovery peptide

BPC-157 is a lab-made chain of 15 amino acids based on a protein first found in stomach fluid. Animal studies look at its effect on blood vessel growth and repair signaling in tendons, ligaments, muscle and the gut lining. A 2025 systematic review of its use in sports medicine found that nearly all of the evidence comes from animals, with very few studies in people. That gap matters: results in rats do not always carry over to humans.

TB-500: a piece of thymosin beta-4

TB-500 is a lab-made fragment of thymosin beta-4, a protein found in most cells that helps control actin, part of the cell's internal skeleton. Thymosin beta-4 has been studied for cell movement and repair, including some early human studies of the full protein in wound and eye care. TB-500 as a stand-alone fragment has much less research.

KPV: what makes KLOW different

KPV is a three-amino-acid fragment of alpha-MSH, a hormone the body makes. Lab and animal studies look at how it interacts with inflammation signaling, especially in the gut lining and skin. It has not been shown to do anything specific in people, and it has not been studied as part of the KLOW blend in large human trials.

GLOW vs KLOW at a glance

What the evidence does not show

There are no large, long-term human trials of GLOW or KLOW as blends. Research on the individual ingredients is promising in labs and animals but early in people. That is why no result is promised, why long-term safety is not established, and why a licensed provider needs to review your history first.

Regulatory status, in plain words

These peptides are compounded, which means a licensed pharmacy prepares them for one patient on a prescription. Compounded medications are not FDA-approved and have not been reviewed by the FDA for safety, effectiveness or quality. In 2026 the FDA moved several of these ingredients off its list of compounding substances that raise significant safety concerns, and its rules on peptide compounding are still changing. Your provider and pharmacy follow the current rules.

Who should avoid GLOW and KLOW

• People who are pregnant, breastfeeding or trying to conceive
• Anyone with active cancer or a history of cancer
• Anyone with a copper allergy or Wilson's disease
• Athletes in tested sports: BPC-157 and TB-500 are on the World Anti-Doping Agency Prohibited List
• Anyone under 18

Possible side effects

The most commonly reported effects are injection-site redness, itching, swelling or bruising. Headache, nausea, flushing and tiredness are reported less often, and allergic reactions are possible. Tell your provider about every medication and supplement you take.

How to get started

If you are curious, start with an online visit. You answer a short health questionnaire, a licensed provider reviews it, and if a program is appropriate, it ships to your door.