r/GLP1Sourcing

Switching from Reta to Tirz

If anyone has used both did you notice any big differences in anything? And results wise did 1 work better than the other?

I’m purely looking at switching at the minute as 10
vials of tirz is cheaper from supplier and if I can save money and possibly get similar results it would be worth it for me

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u/Sad-Injury-859 — 2 hours ago

Brand new to peptides – can experienced users help me build a dosing schedule?

I'm completely new to peptides and have been trying to learn as much as I can before I start anything. I've watched videos and read posts, but I'm still confused by a lot of the terminology and how people decide on dosing protocols.

Here's what | currently have:
BPC-157 - 5 mg
GHK-Cu - 50 mg
Reta (GLP-3)- 5 mg
Kisspeptin - 10 mg
KPV - 10 mg
TB-500 - 5 mg

I also have:
Hospira 30 mL bacteriostatic water
U-100 1 mL/cc 30G 5/16" insulin syringes
Alcohol prep pads

For context, I'm a 20 something-year-old woman, 5'2", and
265 Ibs. My primary goal is weight loss, but I'm also interested in improving healing, reducing inflammation, and overall wellness.

I'm hoping those of you with experience can explain:

How you would approach introducing these peptides instead of starting everything at once?
How you decided on your own dosing protocols and target doses?
How do you schedule injections throughout the week? What days on vs off? AM or PM?
Any beginner mistakes you wish you had avoided?
Any educational resources (guides, books, YouTube channels, or Reddit threads) that helped you understand peptide dosing and protocols?

I'm not looking for anyone to tell me to "just ask my doctor." I'm trying to learn how experienced peptide users think through protocols and dosing so I can better understand the process before making any decisions.

I appreciate any advice or experiences you’re willing to share. Thanks in advanced!

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u/ohthts — 19 hours ago

When a telehealth asks for your prescription….

I read this all of the time but I have never done it. So if I’m taking 15mg what do I show them. The vial or something else?

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u/BartBumblebee — 1 day ago

A simple breakdown of peptide half life and why they matter

So many people mess up their peptide schedules because they completely ignore the half life. Half life is literally just how long a compound actually stays active in your system.

If you take a short half life compound once a week, it will not do anything at all. If you take a super long one every single day, it just builds up way too fast.

I figured it makes more sense to group these by how long they last rather than what they do, so the dosing schedules make more sense.

The short ones (stuff you usually take daily or multiple times a day):

* CJC-1295 no DAC is super fast at around 30 minutes. It is just meant to mimic a natural pulse.

* Ipamorelin lasts about 2 hours.

* BPC-157 clears out in just a few hours, which is why people take it multiple times a day.

* Semax and Selank are both pretty short and clear out fast too.

The long ones (stuff you can space out over days or a full week):

* Tirzepatide lasts about 5 days.

* Retatrutide is around 6 days.

* Semaglutide is about 7 days, which is why you only need it weekly.

* CJC-1295 with DAC is way longer at like 6 to 8 days.

* TB-500 stays active in your tissue for a while so you can space it out more once it builds up.

Knowing this stuff just makes it way easier to understand why the protocols are set up the way they are.

u/Icy_Drummer_2040 — 2 days ago

Injection Site Reaction

Has anyone experienced an injection site reaction? I used a pen for the second time. I’m still figuring it out. As I was pulling the needle out, I stopped and clicked the pen again because it hadn’t fully expel all the tirzepatide. This led to me moving the needle around under my skin and holding it in for a bit longer than usual. Following I noticed the area was red. Today, I noticed the redness went away and there was slight bruising. About an hour ago the area became red, raised, and itchy.

I have MCAS and the itchiness started around the same time I was due to take an antihistamine. I take one daily to manage chronic hives. We’re wondering if we should mix up another vile and toss what’s left in the pen. This has never happened before and it’s my second time dosing myself with this vial at 5mg…

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u/RelevantAir8475 — 2 days ago

Does Crossing want nude photos of us?

July 1: Went through the joincrossing website new customer process.

Everything normal except a demand to upload a recent photo of your "entire body" without stating whether you're allowed to wear ANY clothes and if so what to wear.

On the final page of the process, I paid the $149.00.

July 1: Charge immediately hit as pending.

July 1: They sent me a chat message on their website with zero notification — I only found it by accident.

July 1: Their portal states “Most reviews finish WITHIN one business day.

July 2: Charge fully posted.

July 1–3: Zero shipment, zero movement, zero communication.

July 3: They closed until July 6.

Portal currently shows:

  • LAST PAYMENT $149.00 Jul 1, 2026
  • UPCOMING BILLING $149.00 Jul 27, 2026
  • NEXT RENEWAL Aug 1, 2026

All of this before a clinician has reviewed my questionnaire or prescribed anything — which means five days will have passed before I might find out whether anything will be shipped for the $149.00 they already have.

NOTE: I was tempted to upload a pic wearing a hula skirt.

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u/INFLUENCERGLENN — 3 days ago

Before You PAY for Tirzepatide…

1. Potency matters more than price.

Most reputable compounded Tirzepatide is 15 mg/mL, 18 mg/mL, or 20 mg/mL.

Anything below 15 mg/mL is diluted. If potency isn’t listed, that’s a red flag.

2. Total milligrams matter more than “months.”

A “1‑month supply” means nothing unless you know total mg, vial size, number of vials, and mg/mL.

3. Ask for the pharmacy name.

You need to know if it’s 503A or 503B and which pharmacy actually compounds the medication.

4. Ask about additives.

Some pharmacies add B6, B12, glycine, or nothing. Additives aren’t bad, but you should know.

5. Ask about dose caps.

Some clinics cap doses at 2.5 mg, 5 mg, 7.5 mg, 10 mg, or “any dose” limited by vial size.

6. Ask about refill cadence.

Clinics ship weekly, monthly, every 90 days, or “as needed.” This affects how much you receive.

7. Never pay until you know ALL of this.

If they won’t tell you potency, total mg, vial size, number of vials, pharmacy name, additives,

dose caps, and refill schedule, you’re paying blind.

I had to learn lots of this THE HARD WAY and fight to get refunds. Don't copy THAT me!

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u/INFLUENCERGLENN — 3 days ago

SS-31

Does anyone have experience with SS31? Done my research but would just like to hear as many experiences on it as possible - benefits and drawbacks before I order please if possible, thanks in advanced

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u/Sad-Injury-859 — 3 days ago
▲ 0 r/GLP1Sourcing+1 crossposts

Ghkcu

Just wondering if this is fine where it’s dark blue at the top kind of wet looking, but dry and then the bottom is a lighter blue

Sorry for the blurred photo I have a goofy android

u/Curious-Concert3786 — 3 days ago

Klow via pharmacy?

I’m interested in trying the klow stack for a condition that I have but I would like to order from a legit pharmacy with a prescription not off-white. I see that EllieMD has it but it’s basically the price of Lilly direct zepbound. Are there other telehealths that offer this for better prices? I’ve been googling and only finding either Ellie or off-white. I hope this is allowed to ask since I’m specifically NOT looking for off-white. Does this even exist outside of research? Is Ellie legit? Is there a way to make this affordable? I use a telehealth and compound pharmacy for my tirz, so I’m familiar with that landscape but struggling to find this less mainstream stack.

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u/Counting-Bears — 3 days ago

the way people talk about glp-1s on social media right now is wild

I keep seeing all these TikToks and wellness people talking about GLP-1s like they are just some new daily vitamin you should start taking. I take Mounjaro myself and I promise this is real medicine that actually changes things in your body, it is not just some internet hack. Treating these meds like a new trend is just going to make people misuse them and mess themselves up. Have you guys been seeing this stuff too? It feels like people forget these are actual meds for real health problems.

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u/Sufficient_Bike5937 — 4 days ago

I have been stable on my glp-1 for over two years but my new doctor just told me we need to stop my prescription

I really was not expecting him to drop that on me. I have been maintaining and feeling great for over two years now. I have another appointment with him next month and I was just totally caught off guard. Basically, my insurance changed so I had to switch clinics, and this new guy immediately tells me we need to look at stopping the meds entirely. I know what the studies say and what happens when people quit. It is just super frustrating because now I have to actually fight for my prescription, which is something I never had to do with my last doctor.

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u/OriginalChip7125 — 4 days ago

Wegovy has been amazing for me but I cant stop overthinking the cancer risks especially since i plan to stay on it long term

Wegovy has been working so well for me and the progress is crazy, but I keep stressing over the thyroid cancer warnings. I know they mostly just saw it in rats and they say the actual risk for humans is super rare, but it still just lives in the back of my head. It is just hard not to think about it, especially because I am planning to stay on this stuff long term.

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u/AffectionateLaw9289 — 4 days ago

I am genuinely curious if your doctor warned you about the beauty side effects of rapid weight loss before you started your prescription

I have been reading a lot about Ozempic face and hair shedding lately, and it got me wondering about something. When people get a prescription for a GLP-1, do doctors actually explain what might happen to their skin and hair as the weight comes off? Or is the conversation basically just about metabolic health and the weight loss itself?

I have worked in the beauty industry for a really long time, and the thing is, none of these side effects are actually new. Hair shedding and loose skin are just things that happen when you lose weight fast. You can manage a lot of it at home with basic nutrition and a solid skincare routine, but I am not sure if anyone is actually being told this up front.

Did your doctor mention any of this before you started, or did you just have to figure it out on your own?

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u/Lazy-District6558 — 4 days ago