Everything you're researching, narrowed to one short list.
Weight, skin, stress, recovery, gut — seven goals in, your Vial List out. 60 seconds, nothing to type.
Matches based on publicly documented research · Every product tested by an outside lab — pull the report yourself
Example only
An example match, start to finish
A match is whatever actually fits your goal — sometimes one vial, sometimes a few. Each one named, with what it costs. Below is one worked example, so you can see the whole thing before you answer anything.
Where this goal starts
The Fat Loss Stack
This is an example, not your match. Yours is built from your answers and may look nothing like it.
Reta
$112.49 $124.99The weight-loss heavy hitter · 20mg
Studied in published human weight-management trials.
EvidenceHuman randomised trial
You need this every time
Peptides arrive as dry powder. Bacteriostatic water is what you mix them with, so it goes on every order — including your first. It's counted in the total below, not added on afterwards.
Your code saves$14.00
That 10% comes off automatically through our links — there's nothing to type at checkout. The store doesn't run competing storewide sales, so it isn't a promo you could have waited for a better version of.
Every match spells out
- Each compound in the stack, named
- What published research documents it for, in plain English
- How strong that evidence is — human trial, human pilot, or animal and cell work only
- The study behind it, linked, so you can check it yourself
- The real price and vial size for every item
Takes about 60 seconds.
Real list prices for the sizes shown, with the permanent 10% code already applied. Nothing is for sale on this page.
That's one of them. There are eight stacks across seven goals — weight, skin, energy, calm, recovery, muscle and gut. The quiz picks from all of them, and merges if you pick more than one.
Free · no account · unlimited
Your match comes with someone to ask.
Every match ends with a reference like FL-TEST. Send it and the thread already has your answers: what you picked, what you've tried, what you said was getting in the way. No forms, no signup, no charge, and it doesn't stop after one question.
PepQuiz
(773) 448-2345
Today
- Hi! I just took the quiz and matched with The Fat Loss Stack. Can I get my full stack, my code, and my free questions answered? (ref FL-TEST)
Pre-written for you. You just hit send.
- Got you. I can see your results right here. Stubborn fat, plus the bloating you flagged. That combo is really common and it changes what I'd lead with. Before I send anything over, what's been the most frustrating part so far?
- I work out and eat pretty clean but I keep binge eating at night and I never see results
- So you're doing the work and then the evenings undo it. That's the version I hear most, and it isn't a discipline thing. Your lead match is retatrutide. Same family as those injections you've heard of. The weight side is the part that's been studied hardest: 48 weeks, 338 adults, placebo controlled. Happy to send you the paper if you want to read it.
- how do i know what im getting is real
- Honestly that's the best question you could ask, and you don't have to take my word for it. Every batch gets a lab report and it lives on the testing lab's own site, not ours. I'll give you the code for your exact lot. Type it in yourself. If what comes back isn't what I told you, don't buy it.
- ok and whats the damage
- Reta 20mg is $124.99. You also need bacteriostatic water to mix it, that's $14.99, so I'm counting it in. With your 10% code it's $125.98 all in. No subscription, and the code doesn't expire. Everything's here, prices and the lab report included:pepquiz.co/buy
- ordering now 🙏
- Free, unlimited, and there's nothing to sign up for. It's a text message.
- It already has your quiz answers, so you never repeat yourself.
- Ask as much as you want, whenever. There's no time limit on it.
- It's an AI, not a clinician, and not a consultation. It won't pick a dose.
The reference arrives with your results. Takes about 60 seconds.
Independent verification
Look up a lab report before you buy anything
Pick a product. The link opens its certificate on the testing lab's own site, not ours. No account, no login.
- Certificate code
- U83PD6BX
- Purity, current lot
- 99.91%
Rather not use our link? The code above works in the lookup on proofpointanalytical.com.
Two tests, because there are two questions
The first asks how much of what's in the vial is actually the compound — that's the purity number. The second asks whether it's the right compound at all, because a very pure vial of the wrong thing is still the wrong thing. On the report these are labelled HPLC and LC-MS. A certificate that ran only one of them has answered half the question.
Why a code and not a PDF
Photoshopped lab reports circulate in this space, and a PDF sitting on our server proves nothing about that. Type the code into the lab's own lookup instead. We can't edit what comes back.
Where this stops
The seller pays for the testing and picks the sample that goes to the lab. That is normal for this category and it is still weaker than sending a vial in yourself. Nothing here stops you doing that.
How it works
Four steps, start to vial
There is no appointment and no prescription anywhere in it.
- 1
Take the quiz
Six to eight screens, depending on how many goals you pick. What you want to work on, then one follow-up for each thing you picked, then a few about you. The last one asks whether this is a few weeks or a long project. That answer only sets vial size.
- 2
Your answers pick the stack
This is a routing table, not a model. There are eight stacks and your answers decide which one you land on. A few answers reroute you outright: say bloating on the weight question and you get the gut stack instead. Pick more than one goal and the stacks merge into one list, one lead compound each, so three at most. Same answers in, same stack out, every time.
- 3
You see what you matched
The stack name shows up straight away. The rest of it (each peptide, what it is documented for, prices, the lab report for that lot) takes one more step. Text the number on the results page, or leave an email and we send it. The text thread is an AI. It is not a clinician and it is not a consultation.
- 4
You order from the store
The buy buttons are pepquiz.co links that forward to the product page with the 10% already applied. The store takes the order and ships it. Nothing is bought or paid for on this site.
Before you go further
What you're actually buying
Four definitions and one piece of arithmetic that trips almost everybody.
A peptide
A short chain of amino acids. Long chains are proteins, short ones are peptides, and the cutoff is arbitrary. Somewhere around 50 amino acids, depending on who is writing.
Your body already makes thousands of them. Insulin is one.
A stack, and why yours might not be one
A stack just means more than one at a time. The word came off lifting forums rather than out of a lab, and it carries no technical meaning at all.
Plenty of matches are a single vial. That is not a lesser result, and nothing here pads one out to make it look like more.
"Research use only"
It is the category these are sold in, and it is not a formality. No pharmacist, no leaflet in the box, no dose printed anywhere on the vial, and no clinician attached to the purchase.
It also means these are not sold for personal use, and nothing on this site tells you to take anything. What we do is name what has been studied, show you the lab report, and link the paper. What anyone does with that belongs with a licensed clinician, not with us.
What actually arrives
A small glass vial, rubber stopper, metal crimp. Inside is a dry lyophilised powder, which means freeze-dried. Often it looks like nothing at all: a thin white disc, a film, sometimes barely visible against the glass. People write to vendors convinced the vial came empty. It usually did not.
You cannot measure any of it while it is dry. It has to be reconstituted first, with bacteriostatic water added slowly down the inside of the glass, then swirled rather than shaken. Bac water is bought separately. It does not come with the peptide.
Insulin syringes are marked in units
U-100 barrel. 100 units = 1 mL. One unit = 0.01 mL.
Not mL. Not mg. Units, and the number is small on purpose: a unit is a hundredth of a millilitre.
Units measure volume. They say nothing about how much peptide came with it. A 5 mg vial mixed with 1 mL of bac water and the same 5 mg vial mixed with 3 mL both fill to the 10-unit mark the same way, and the second one holds a third as much. The syringe has no idea what is in it. Only your mix decides that.
Forums answer this badly. One careful question about which bacteriostatic water to use got a single reply back: “You need a better vendor.”
You give it the vial size, the water you added, and the dose you have already chosen. It returns the unit mark. It does not pick a dose for you.
We default you to the cheaper vial
Unless you tell the quiz you're in this long-term, every compound in your match comes back at the smaller size. Nobody has to notice it or opt into it. It is the default. You have to pick the long-term answer to be shown the bigger vials at all.
The whole mechanism, in the file that builds your match:
answers.commitment === "long-haul" ? "large" : "standard"src/lib/match.ts
What that default costs, at today's list prices:
- Reta−$25.00
20mg $124.99 by default, not 30mg $149.99
- GHK-Cu−$10.00
50mg $34.99 by default, not 100mg $44.99
- CJC / Ipamorelin−$20.00
5mg $49.99 by default, not 10mg $69.99
- NAD+−$25.00
500mg $44.99 by default, not 1000mg $69.99
That is order value we keep out of your cart by default. We are paid a commission on what you spend, so the gap comes off our side of it, on every first order.
Four of the compounds sold in two sizes. Where something only comes in one, there is no default to give away.
A site optimising for commission runs this the other way round. It defaults everyone to the largest vial and leaves the small one available for whoever thinks to go looking. Defaults are where affiliate revenue is actually made, and ours is pointed the wrong way for us.
We would rather your first order be small enough that you can walk away from it.
Every price shown here is the store's own list price. The code is PEPQUIZ and it takes 10% off. Enter it at the store without ever touching this site and you pay the same. We do not set prices there and we do not mark anything up.
Answer the long-term question differently and the sizes on your links change.
Reconstitution math
Working out what to draw on the syringe
It converts numbers you enter. It does not pick a dose — that number is one you supply.
- Insulin syringes are marked in units, not mL or mg. One unit is a hundredth of a mL.
- The amount of bacteriostatic water you add sets the concentration, so it changes every measurement after it. Same vial, different water, different number on the syringe.
You enter
- Peptide in the vial, in mg
- Bacteriostatic water added, in mL
- Your dose, in mcg or mg
- Syringe size — 0.3, 0.5 or 1 mL
It gives back
- Units to draw
- The same figure in mL
- Concentration, in mg/mL
- How many of your doses that vial holds
- Says so when the result will not fit the syringe you picked.
- Lists the reconstitution steps — swab the stopper, run the water down the glass, swirl rather than shake, keep it cold.
Before you order
Questions we get
Every product here is tested by ProofPoint Analytical. You can look up any batch code on their site — no account, no login, and it's their domain, not ours. Two tests run on every batch, because there are two separate questions: how much of the vial is really the compound, and whether it's the compound on the label at all. On the report they're labelled HPLC and LC-MS. Here's the part most sites skip: the vendor pays for the testing and picks the sample. That's normal in this industry, and it's still weaker than you sending a vial to a lab yourself. That option exists and it costs money.
Reasonable question. In 2023 researchers test-purchased from six online sellers offering semaglutide without a prescription. Three of the six orders never arrived — the money was just gone. That's J Med Internet Res, 2024, doi.org/10.2196/65440, if you want to read it yourself. We only link vendors we've ordered from. If an order you placed through us goes wrong, tell us. A vendor that stops delivering is a vendor we stop linking.
Yes. Everything matched here is studied in injectable form — real spray versions of these don't exist yet, and we would rather say so than point you at one that does nothing. What it actually involves: an insulin syringe, the short fine kind, into fat rather than muscle. Not the needle you are picturing from a blood draw. If you have never done it, being uneasy about it is the normal reaction and not a disqualifying one. But if it is a no, it is a no — that is a real reason not to start and we are not going to talk you out of it.
It's a routing table, not a black box. Your main goal picks a stack. A follow-up answer can override it. Pick more than one goal and we merge them, one lead compound per goal, so you're not handed a shopping list. That's the whole mechanism — no model, no scoring, nothing analyzing you. Different answers do land in different places. But an online quiz knows nothing about your body, and anything implying otherwise is selling you something.
It arrives as dry powder. You add bacteriostatic water before anything can be measured. Two places people get stuck: how much water (it sets the concentration, so it changes every measurement after), and the syringe — insulin syringes are marked in “units,” not mL or mg, and one unit is a hundredth of a mL. Our calculator converts it: vial size, water volume, intended research dose, out comes the syringe reading. Free, no email. It won't pick a dose for you, only convert the numbers you enter. If a powder behaves oddly when you reconstitute it — gel-like, cloudy, won't clear — that's a quality signal about the batch, not something you did.
That is the short version.
The quiz asks what you are actually after and matches a stack to it. Takes about a minute.
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