Peptides: where to begin? • Hacker News Board

Re: Peptides: where to begin?

#71

Post by olalonde » Mon, Apr 06, 2026, 10:42 PM UTC

__MatrixMan__ wrote: post #48

olalonde wrote: post #36

The author is missing a massive segment of that gray market: people who buy FDA-approved weight loss drugs (e.g., semaglutide or tirzepatide) at 2–5% of the brand-name price. This route carries some risk, but there are ways to mitigate it, such as performing third-party testing. I assume most people who do this couldn't realistically afford the brand-name drug anyway, making this their only viable treatment.

I imagine it's legally risky to buy a large quantity, test it, and then resell smaller quantities. That's a shame because the alternative is probably that some folks settle for products of dubious quality and end up getting hurt.

Yes, I believe most people buy directly from somewhat shady Chinese factories. I tried contacting a few and they all refuse to meet or send samples from within China, so I assume what they're doing is illegal in China. In the US, it's legal to sell them as a "research chemical" but the FDA is cracking down on companies that are clearly engaging in b2c.

There's this company that offers free testing: https://finnrick.com/

Another popular testing company is https://janoshik.com

Some other useful resources: https://graymarket.substack.com/ and https://glp1forum.com/

There are a few subreddits as well.

FWIW, I never ended up buying any myself.

Re: Peptides: where to begin?

#72

Post by bsder » Mon, Apr 06, 2026, 10:43 PM UTC

hombre_fatal wrote: post #52

kube-system wrote: post #43

Earlier quoted context omitted.

GLP-1 prescriptions are easy to get in the US. It's filling the prescription that is the problem, because insurance rarely covers it and it is beyond the disposable income of most Americans. The prescription hurdle is absolutely necessary -- these are not drugs that anyone can safely take without guidance. It's the price that needs to be fixed.

I know a lot of people on GLP-1 meds and even took a dose myself out of curiosity. You take a dose every two weeks. And if you accidentally double dose because you misread 1U to mean 1 dose, it just gives you some nausea. Are we going to pretend it's hard to take this drug now too? Or that the doctor has some magical insight into your getting-on? Remember to eat. That's it. I guess a few people might need the doctor…

> Or that the doctor has some magical insight into your getting-on beyond a couple questions they ask you in your visit? Remember to eat. That's it.

Apparently we have forgotten people who died from eating disorders (previously called anorexia nervosa)?

There is a VAST difference between someone who weighs 300lbs asking for GLP-1 to combat morbidity and someone who is barely 100lbs asking for a GLP-1 to take off weight for bikini season. That's what needing to ask a doctor for a prescription is for.

Re: Peptides: where to begin?

#73

Post by rootusrootus » Mon, Apr 06, 2026, 10:43 PM UTC

hombre_fatal wrote: post #52

kube-system wrote: post #43

Earlier quoted context omitted.

GLP-1 prescriptions are easy to get in the US. It's filling the prescription that is the problem, because insurance rarely covers it and it is beyond the disposable income of most Americans. The prescription hurdle is absolutely necessary -- these are not drugs that anyone can safely take without guidance. It's the price that needs to be fixed.

I know a lot of people on GLP-1 meds and even took a dose myself out of curiosity. You take a dose every two weeks. And if you accidentally double dose because you misread 1U to mean 1 dose, it just gives you some nausea. Are we going to pretend it's hard to take this drug now too? Or that the doctor has some magical insight into your getting-on? Remember to eat. That's it. I guess a few people might need the doctor…

> You take a dose every two weeks

Weekly, if you are following guidelines correctly. The half-life of most GLP1 peptides is 5-6 days.

I otherwise agree with your point entirely. Though anecdotally, I may have given my brother-in-law a single small vial of tirzepatide at his request so that he could experience it, and the results were ... not good. Turns out he's an idiot, thought that 'more is better', 'drinking enough water is for weenies', and 'I am not an alcoholic even though I get plowed most evenings.' All against my very specific advice on how to give it a try. Whoops.

My fault, yes, I should have realized he was too stupid to do it without adult supervision. He made himself so sick he almost went to the ER. Nothing really dangerous, of course, tirzepatide is pretty safe stuff, but overdosing on it can make you feel very shitty for a few days until the blood concentration drops.

Re: Peptides: where to begin?

#74

Post by XorNot » Mon, Apr 06, 2026, 10:44 PM UTC

dc396 wrote: post #32

Bender wrote: post #6

Earlier quoted context omitted.

I agree with some of this. There are most certainly orally active peptides such as BPC-157 and its replacement PDA penta deca arginate that can repair the gut and still circulate throughout the body especially in those with leaky gut. People with leaky gut should be able to buy a clean source of BPC-157 or PDA without a prescription and without visiting dark alleys. It is very safe and tolerable. GLP's are all the ra…

> It is very safe and tolerable. Can you point to the clinical trials that demonstrate this? > Doctors seem to be giving GLP peptides out like candy and those are injected. There have been several _thousand_ clinical trials that have shown GLP-1s to be safe and effective.

Also LOL at the notion "peptides are safe because GLP-1 exists".

Pretty much all venoms are mixes of short (10-15 base) peptide chains.

It's the naturalistic fallacy in an utterly perverse form ( and also goes to show why a regulatory system is good: the average person has no idea that they're dealing with or even common sense about it).

Re: Peptides: where to begin?

#75

Post by kube-system » Mon, Apr 06, 2026, 10:44 PM UTC

phil21 wrote: post #54

kube-system wrote: post #43

Earlier quoted context omitted.

GLP-1 prescriptions are easy to get in the US. It's filling the prescription that is the problem, because insurance rarely covers it and it is beyond the disposable income of most Americans. The prescription hurdle is absolutely necessary -- these are not drugs that anyone can safely take without guidance. It's the price that needs to be fixed.

> The prescription hurdle is absolutely necessary You're totally missing the point thought. The prescription hurdle effectively does not exist. It's just a paywall. You pay your $100, get a 3 minute call with a NP/PA/whomever, and basically the robot writes you a prescription for whatever you want. The point is you pay and you get the prescription. Patient safety has nothing to do with anything.

It's cheaper for most people to get the prescription written at a PCP.

The advantage to a telehealth is not getting the prescription written -- it's that they'll fill it for cheap through a tiny compounding pharmacy that is making it, technically illegally, but are small enough to be off the FDAs enforcement radar for the moment.

Re: Peptides: where to begin?

#76

Post by dc396 » Mon, Apr 06, 2026, 10:45 PM UTC

diath wrote: post #62

dc396 wrote: post #53

Earlier quoted context omitted.

> Ok, and? According to our new AI overlords, a short synopsis of potential risks of BPC 157 based on mechanistic and animal work to date (don't know human risks because there haven't been sufficient clinical studies): * Possible pathologic angiogenesis (abnormal blood‑vessel growth), which theoretically could support tumor growth or inflammatory and autoimmune processes. * Modulation of nitric‑oxide pathways that, a…

Have you ever looked at leaflets attached to any medicine prescribed by doctors?

You mean the ones that are the result of experience through controlled clinical trials with statistical analyses and error bars, yep, sure. I guess I have a bit more faith in those leaflets and the testing regimes that generates them than the word of some gymbro or influencer who injected themselves and didn't immediately fall over dead.

Re: Peptides: where to begin?

#77

Post by tptacek » Mon, Apr 06, 2026, 10:45 PM UTC

kube-system wrote: post #70

hombre_fatal wrote: post #52

Earlier quoted context omitted.

I know a lot of people on GLP-1 meds and even took a dose myself out of curiosity. You take a dose every two weeks. And if you accidentally double dose because you misread 1U to mean 1 dose, it just gives you some nausea. Are we going to pretend it's hard to take this drug now too? Or that the doctor has some magical insight into your getting-on? Remember to eat. That's it. I guess a few people might need the doctor…

One dose is one thing -- but there are other risks that can lead to complication or death here if taken improperly for a long period of time. Musculoskeletal issues, cardiac issues, thyroid issues, etc. Additionally, getting the correct dose is not straightforward for a layperson as it is for other OTC drugs with standard doses.

There are similar risks, and probably more likely, to all sorts of consumables that aren't regulated at all. It is reasonable to ask whether the prescription regime for GLP-1s makes sense. It isn't the only substance posing that conundrum! Ondansetron is OTC in a lot of countries, but not in the US, Canada, or UK. But ondansetron is arguably less dangerous and more helpful than pseudoephedrine.

Re: Peptides: where to begin?

#78

Post by cjbgkagh » Mon, Apr 06, 2026, 10:46 PM UTC

olalonde wrote: post #36

The author is missing a massive segment of that gray market: people who buy FDA-approved weight loss drugs (e.g., semaglutide or tirzepatide) at 2–5% of the brand-name price. This route carries some risk, but there are ways to mitigate it, such as performing third-party testing. I assume most people who do this couldn't realistically afford the brand-name drug anyway, making this their only viable treatment.

I bought Semaglutide at 50c/mg and had it tested, it's the real deal. What's the normal price, $100/mg?

My gf is in medicine so she had a friend test it through their work.

Re: Peptides: where to begin?

#79

Post by kurthr » Mon, Apr 06, 2026, 10:46 PM UTC

__MatrixMan__ wrote: post #48

olalonde wrote: post #36

The author is missing a massive segment of that gray market: people who buy FDA-approved weight loss drugs (e.g., semaglutide or tirzepatide) at 2–5% of the brand-name price. This route carries some risk, but there are ways to mitigate it, such as performing third-party testing. I assume most people who do this couldn't realistically afford the brand-name drug anyway, making this their only viable treatment.

I imagine it's legally risky to buy a large quantity, test it, and then resell smaller quantities. That's a shame because the alternative is probably that some folks settle for products of dubious quality and end up getting hurt.

Actually, you just described most of the tele-health and compounding pharmacies that carry GLP1s!

Where do you think Hims, Ro, Brello, or the rest get the APIs they sell to their customers? They get them from grey market suppliers in China. They don't go to Ely Lilly or NovoNordisk and say, "politely sir, may I skirt around your IP and sell your drugs for 10x what they cost instead of 10,000x what they cost?" Hopefully, they test them and filter them and use sterile/pharma processes for what they sell to their customers. Well, except for the Medspas, those are just wild west snake oil farms.

Re: Peptides: where to begin?

#80

Post by kube-system » Mon, Apr 06, 2026, 10:47 PM UTC

tptacek wrote: post #77

kube-system wrote: post #70

Earlier quoted context omitted.

One dose is one thing -- but there are other risks that can lead to complication or death here if taken improperly for a long period of time. Musculoskeletal issues, cardiac issues, thyroid issues, etc. Additionally, getting the correct dose is not straightforward for a layperson as it is for other OTC drugs with standard doses.

There are similar risks, and probably more likely, to all sorts of consumables that aren't regulated at all. It is reasonable to ask whether the prescription regime for GLP-1s makes sense. It isn't the only substance posing that conundrum! Ondansetron is OTC in a lot of countries, but not in the US, Canada, or UK. But ondansetron is arguably less dangerous and more helpful than pseudoephedrine.

Pseudoephedrine, of course, isn't BTC because it's dangerous to take or complicated to dose. It's there because of the war on drugs. But I do agree that not all drugs are regulated appropriately. Marijuana also comes to mind.

I do think GLP-1s are just about right. It is appropriate to take them under personalized professional guidance.