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Someone on a forum reported new skin growths after months of using sermorelin and then adding BPC‑157 and TB‑500. They describe starting sermorelin five times a week, then a couple months later adding the two other peptides at similar dosing. About nine months in they noticed small pale, flesh‑colored bumps on the inside of their upper arms that have been slowly growing in number and size and spreading outward. Sermorelin is a synthetic fragment of a natural hormone that tells the body to release growth hormone. People use it to try to boost recovery, energy, or body composition, though it’s prescribed for very specific medical reasons. BPC‑157 and TB‑500 are experimental peptides that some people use for supposed healing or anti‑inflammatory effects; they are not approved medicines in most countries and mostly come from research chemical suppliers. None of these are the same as common drugs like Ozempic — they work through different pathways. What the forum post actually shows is an anecdote — one person noticing skin changes after starting these substances. That’s not the same as a controlled study. Anecdotes can suggest a possible link but can’t prove cause and effect. There are no details about medical evaluation, biopsy, timing for each bump, or other factors (other drugs, medical history, sun exposure, infections) that might explain the growths. So we only know: this person saw skin bumps after using these peptides. We don’t know if the peptides caused them, coincided with them, or made an existing tendency more noticeable. Why this matters is practical: people using unregulated peptides should pay attention to new skin changes and other unexpected symptoms. Skin growths can be harmless (like benign cysts or skin tags) or signs of infection, an immune reaction, or something needing treatment. Anyone injecting substances regularly should monitor injection sites and overall skin, because repeated injections or contaminants can cause problems. Doctors use a biopsy or clinical exam to tell benign from worrisome growths, so a medical check is the reasonable next step. Caveats and risks: forum reports are low-quality evidence. These peptides have limited safety data in humans, and dosing from non‑medical suppliers can vary. Potential issues include local reactions at injection sites, allergic or immune responses, infection from nonsterile technique, and unknown long‑term effects. If you have similar growths, stop using the products and see a healthcare provider for an exam; don’t assume they’re harmless. Also be aware that BPC‑157 and TB‑500 are widely unregulated and may carry risks that aren’t well studied. Bottom line: one person reported skin bumps after using sermorelin plus BPC‑157/TB‑500, but there’s not enough evidence to say the peptides caused them — see a doctor and be cautious with unregulated injections.
Source: r/Peptides