PDA is a bpc-157 relative. GLOW blend is a ghk-cu + bpc-157 + tb-500 combo.
They are aimed at different things: PDA at healing & recovery; GLOW blend at skin & recovery.
| Comparison | PDA (Pentadeca Arginate) pentadeca arginate · BPC-157 arginate | GLOW blend GLOW |
|---|---|---|
| How it works | How it works PDA is BPC-157 as an arginate salt rather than an acetate salt. The peptide chain is the same; the counter-ion is different. | How it works GLOW is three peptides pre-mixed in one vial: GHK-Cu, BPC-157, and TB-500. |
| What it is | A newer, more stable cousin of BPC-157 for faster healing. | A popular skin-and-healing blend of three peptides in one shot. |
| Status | Research only | Research only |
| Typical dose | 0.25–0.5 mg per day | — |
| How often | 1-2x daily | Daily |
| Dose comes from | Community practice | No established range |
| Cycled? | Commonly run in 4 to 8 week blocks, like BPC-157 Community practice | No established schedule No established range |
| What it does | ||
| Drug class | BPC-157 relative | GHK-Cu + BPC-157 + TB-500 combo |
| Used for | A newer, more stable cousin of BPC-157, used for the same thing: faster healing of gut, tendons, muscle, and inflammation. It is marketed as longer-lasting. | A popular beauty-and-healing mix: a skin-repair copper peptide plus two recovery peptides, all in one injection. |
| Receptors hit | — | — |
| Numbers | ||
| Full dose line | 0.25 up to 0.5 mg per day (start low, increase slowly) | Per blend (mcg each) |
| Why that cycle | Same convention as BPC-157, which it is a salt form of. No human study has tested a duration. | No published study has established how long to take this or whether a break is needed. Schedules quoted online come from vendors and forums, and different sources disagree. |
| Weight / effect | Not measured in a trial | Not measured in a trial |
| Chain length | 15 residues | Not disclosed |
| Common vial | 10 mg | 70 mg |
| Before you start | ||
| Route | Under the skin (subcutaneous) | Under the skin (subcutaneous) |
| Do not use if | No published human trials exist, so no contraindications are established Pregnancy Active cancer, as a precaution given the healing mechanism | A known copper allergy or metal sensitivity, so patch test first Broken or actively irritated skin Layering with strong acids or retinoids on the same area Active cancer, as a precaution given that it promotes new blood-vessel growth Pregnancy Banned in drug-tested sport Active cancer, as a precaution given the tissue-growth mechanism |
What separates them
Proof behind the dose. Every dose here comes from community practice. Not one is backed by a published human study, which is worth knowing before you read the numbers as if they were equivalent.
What doesn't differ: They are both taken the same way (under the skin). Neither has a measured effect size from a published trial, so there is no number to rank them on.
What people actually report
PDA (Pentadeca Arginate)
- It is very new, with little formal data, and carries the same blood-vessel-growth cancer caution as BPC-157.
- Signs of an allergic reaction
- Anything unusual, given the absence of human data
GLOW blend
- It combines research-only peptides, so the cautions of each apply.
- Banned in drug-tested sport.
- A spreading rash or significant swelling where applied
- Signs of an allergic reaction
Side effects are what users and trials report most often, not a complete list. Anything sudden, spreading, or breathing-related is an emergency regardless of which compound caused it.
People also compare
This comparison does not cover cost, long-term safety, or how you personally will respond. Effect figures come from separate trials in different populations and are not always directly comparable to each other. Nothing here is medical advice or a recommendation to use any of these. Talk to a clinician about your own situation.