Reta rash...allergy or something else?

Liftxo

Liftxo

Well-known member
Been on Reta since spring of '25. Always used sterile water I got from a reliable source. My hubs and some relatives are on the same batch, no problems. Lately, I'm getting these itchy bumps, start small, then get huge, like golf ball size. They hang around for days. I usually inject in my belly, trying to move around the injection site, but it's getting worse. Tried my thigh, same deal. Thought maybe it was just from injecting in the same spots too much until my thigh blew up! I haven't used my thigh in weeks. Feels like an allergic reaction. Anyone else experience this? Should I try a different source, or switch to tirz?
 
Yeah, it happens. It was with Tirz for me, but my wife got it with Reta.

You could try using a longer needle (like half an inch) and injecting into your deltoid. It might avoid some of the immune response. Also, try rubbing the area with a nasal spray before and after the shot.

Switching peptides will probably work, but that's not ideal.

Most people say it clears up after a few months.

If you start getting hives in places you didn't inject, you should definitely switch.
 
Thanks! That's super helpful. So, injecting in the shoulder, is that an intramuscular injection then?
 
It's definitely effective. Both for the medication and usually for stopping the site reaction you're talking about.

Safe is up to you. Using research peptides is already a risk.

You're intentionally skipping part of your immune system, though. Are you careful with cleaning the area? Do you use a filter?
 
I remember reading that some people in the tirz trials developed allergies over time. So, it wouldn't surprise me if that happens with Reta and other GLPs. But I think the reactions weren't classified as serious enough to require a warning label or anything.
 
The welts and itchiness could just be from not injecting deep enough. You might be injecting at too much of an angle.

In other words, the bump might be from injecting *between* the layers of skin, instead of *under* the skin.

That happened to me on both tirz and Reta. The swelling/itchiness would last a day or two.

If you think the angle is the problem, try injecting straight in (90 degrees) before you try a longer needle.

But honestly, you should get a doctor, PA, nurse, or pharmacist to watch you inject. They could check your angle and tell you if that's the issue.
 
I concur with @FastingGains that injection technique is paramount in mitigating local injection site reactions (ISR). Ensuring a 90-degree angle and proper subcutaneous administration is crucial. However, given the increasing severity and size of the welts, an allergic component should also be considered. Antihistamines (oral or topical) may provide symptomatic relief. If symptoms worsen or become systemic, discontinuation and evaluation by an allergist is warranted.
 
I've seen this frequently in patients using compounded GLP-1 receptor agonists. While sterile technique is important,
Jess_61 said:
Are you good about your antiseptic procedures?
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I'd be more concerned about the quality and purity of the peptide itself and the sterility of the compounding process. Sourcing from a reputable compounding pharmacy is crucial, and even then, batch-to-batch variations can occur. Allergic reactions, while possible, are less common than reactions to impurities or endotoxins.
 
Thanks @Ratched77, that makes me think I should switch suppliers. I've been using the same source for a while, but maybe something changed with their process. It's just so hard to know who to trust!
 
Hey @Cat-Fixed, I'm curious about that too! I've been researching Reta and keep seeing those Chinese suppliers. What's Janoshik testing? Is that something I should do if I order from there?
 
Cut_xx said:
What's Janoshik testing?
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Janoshik Analytics is a laboratory that performs peptide purity and concentration testing. It's a worthwhile investment to verify the quality of research peptides, especially when sourcing from unregulated suppliers. However, it only tests that specific vial, not the entire batch.
 
Shoulders aren't bright red but patchy and rough. Friends have asked about rash but it's been like this 5 years. The blush gets worse after exercise in the cold - running, basketball, heavy lifting.
 
An allergy panel is the right first move. The elimination diet angle is a separate path from site reactions - localized bumps that grow and spread point to injection hypersensitivity more than systemic food sensitivity.
 
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