PNC-27 and PNC-28 are each a p53-derived peptide.
| Comparison | PNC-27 PNC27 · PNC-27 peptide | PNC-28 PNC28 · PNC-28 peptide |
|---|---|---|
| How it works | How it works The theory behind PNC-27 is genuinely clever, and it is worth understanding so you can see exactly where the evidence stops. | How it works A designed peptide from the p53 program, built to find a marker on cancer cells and break them open. |
| What it is | A lab-designed peptide with big cancer claims and no human trial in 25 years. | The lesser-known sibling of PNC-27, with the same cancer claims and the same missing human trials. |
| Status | Research only | Research only |
| Typical dose | 100–500 mcg per day | 100–500 mcg per day |
| How often | Varies | Varies |
| Stays active | Nothing published | Not established |
| Dose comes from | Community practice | Community practice |
| Cycled? | No established pattern No established range | No established pattern |
| What it does | ||
| Drug class | p53-derived peptide | p53-derived peptide |
| Used for | Sold online with anti-cancer claims. It has only ever been studied in cells and mice. | Sold online with anti-cancer claims. It has only ever been studied in cells and animals. |
| Receptors hit | — | — |
| Numbers | ||
| Full dose line | Research only | Research only |
| Why that cycle | Nothing is known about how long it stays in a person or what repeated doses do. | There is no human use to describe. Any schedule printed by a vendor has no evidence behind it. |
| Weight / effect | Not measured in a trial | Not measured in a trial |
| Chain length | 32 residues | 27 residues |
| Common vial | — | — |
| Before you start | ||
| Route | Under the skin (subcutaneous) | Under the skin (subcutaneous) |
| Do not use if | Anyone with cancer who is using it in place of, or alongside, real treatment without telling their oncologist Pregnancy Anyone expecting it to do what the marketing says, since no human evidence exists | Anyone with cancer who is using it in place of, or alongside, real treatment without telling their oncologist Pregnancy Anyone expecting it to do what the marketing says, since no human evidence exists |
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), aimed at the same thing (cancer research) and on the same schedule (varies). Neither has a measured effect size from a published trial, so there is no number to rank them on.
What people actually report
PNC-27
- No human has been studied taking this, so nothing about its safety in people is known.
- It is sold to people with cancer, which makes the missing evidence more serious, not less.
- Any reaction at all, since there is no safety record to compare against
- Signs of an allergic reaction such as face or throat swelling, hives, or trouble breathing
PNC-28
- No human has been studied taking this, so nothing about its safety in people is known.
- It is sold to people with cancer, which makes the missing evidence more serious, not less.
- Any reaction at all, since there is no safety record to compare against
- Signs of an allergic reaction such as face or throat swelling, hives, or trouble breathing
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.