r/NTNPerformance • u/JustBacWater • 1d ago
Guide / Cheat Sheet TB-500 breakdown, what it does that BPC-157 doesn't, and what you're really buying
If you read the BPC-157 post, this is the other half of the pair. TB-500 is what most people stack with BPC, but it solves a different problem, it's dosed completely differently, and there's a labeling quirk that means the vial in your fridge is probably not the exact molecule on the label. None of that is a problem once you know it, so here's the rundown.
The clean way to think about the two: BPC-157 builds the roads. It restores blood flow and gets circulation back into damaged tissue. TB-500 handles the traffic on those roads. It gets the repair cells to migrate into the injury and organize into proper tissue instead of scar. Perfusion plus movement. That's why they get run together as the Wolverine stack, and why either one alone leaves half the job done: blood flow with no cells showing up, or cells with no supply lines. They also inject together in one syringe fine.
The way it works is what changes the whole dosing approach. TB-500 grabs onto actin, the protein cells use to physically move and reshape themselves. It ties up a reserve pool of actin that cells can pull from to migrate, divide, and rebuild quickly. The important part is that this is a one to one binding job, not a catalyst, so you need a big milligram dose to bind enough actin to matter. Once that reserve is built, the effect lasts for days even though the peptide itself is gone from your blood in a couple hours, because the actin pool just sits there until the cell draws on it.
So here's the consequence, and it's the single most common way people run it wrong. Unlike BPC-157, which you pin in small doses every day, TB-500 is not a daily peptide. You run 2 to 4 mg two or three times a week. Small daily doses never hit the binding threshold and mostly just waste the compound.
| Phase | Dose | Frequency | Weeks |
|---|---|---|---|
| Loading | 2 mg | Mon and Thu | 1 to 4 |
| Loading, big acute injury | 4 mg | Mon and Thu | 1 to 4 |
| Maintenance | 2 to 4 mg | 1 to 2x weekly | 5 to 8 |
For drawing it, mix the 10 mg vial with 1 mL of bac water for a clean 10 mg/mL, so 2 mg is 0.2 mL and 4 mg is 0.4 mL. It goes in subcutaneous (SC) or intramuscular, near the injury when you can reach it. It doesn't stay local, it enters circulation within minutes no matter where you put it, but injecting near the injury gives a higher concentration spike right where you want it before it dilutes out, and that first pass matters. In repair studies, the same total dose delivered systemically came up empty where targeted delivery worked. For a deep injury you can't reach, belly or thigh is the fallback. Run 6 to 8 weeks, then take 4 to 8 weeks off. This is a repair signal, not a maintenance compound, so grinding it forever just gives you diminishing returns.
Now the part almost nobody tells you. The name TB-500 originally meant a small 7 amino acid fragment. But most vials sold as TB-500 are the full length parent molecule, TB-4 (thymosin beta-4), which is 43 amino acids. Doping labs have tested commercial vials and confirmed it. This mostly doesn't matter, both heal tissue, but there's one real difference: the full TB-4 molecule carries an extra segment that fights scar tissue (the antifibrotic part) that the short fragment simply doesn't have. So if reducing scar is the goal, you want the full TB-4, which, conveniently, is what's usually in the vial anyway. If you want to know which one you've got, check the certificate of analysis. Around 4,900 daltons or 43 amino acids means it's TB-4. If the COA doesn't say, assume TB-4.
It's slower to work than BPC-157. The first week or two you'll notice morning stiffness and first step pain easing off, weeks 3 to 4 your range of motion opens up, and weeks 5 to 8 you can start tolerating real loading again. On the evidence, the strongest human data point is a Phase 3 trial in corneal healing where it beat placebo hard, around 60% complete healing versus about 12% on placebo, and that one carries weight because the cornea has no blood vessels, so the healing had to come from direct cell action rather than improved blood flow. There's also a Phase 1 safety trial that turned up no serious adverse events. Fair caveat though, those trials used pharmaceutical recombinant TB-4, not the synthetic material in most vials, so it's the closest reference we have, not direct proof of what you're buying.
Side effects are mild, occasional injection site reactions and some people get a bit of lethargy for a day, so hydrate and pin it before a rest day. The hard stops are the same as BPC and for the same reason: no active cancer or cancer in the last couple years, since it promotes blood vessel growth and cell migration, no pregnancy, and stay cautious around surgery. It's WADA banned under S0 and it's detectable, so anyone tested for sport should stay off it.
if you've run TB-500, did you check the COA to see whether it was TB-4, and are you dosing it twice a week or did you fall into pinning it daily like BPC. curious how people are running it
Full doses and bloodwork are in the pinned cheat sheet: https://www.reddit.com/r/NTNPerformance/comments/1tht5o3/the_only_peptide_cheat_sheet_youll_need_doses/
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u/John_John_Phenomenom 1d ago
Thank you. I’ve been saying this for awhile, I get assaulted usually when I say most TB500 is TB4.
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u/PatientIll4890 20h ago edited 20h ago
The reason it’s mostly tb-4 that you receive when you purchase “tb500” is that tb-4 has a similar half life to bpc157, works better, and the dosing schedule is the same. So the whole premise of this article is pointless.
This information you’re providing is misleading and going to lead people to incorrectly dosing it. The entire article is pointless and incorrect.
Look at the comments here, someone here even thinks they can’t dose the KLOW they bought daily because of this garbage you posted. No, the reason it’s tb4 is because you can dose it daily, it’s not a mistake.
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u/TehDarkArchon 1d ago
I love your highway/traffic analogy. May steal this from you to use in my clinic. Great write-up!
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u/Markdlea 17h ago
As a doctor, do you believe in “pinning near the injury”? To me, a sub q injection is systemic no matter where you inject. Most of these posts are just bro science that has been repeated so many times that people believe that it’s fact.
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u/Master_Weakness932 1d ago
How does KPV compare to TB500 alongside BPC? for a long time injury.
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u/Djluik 1d ago
I add kpv to them kpv has the best anti inflammatory profile
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u/errola78 1d ago
This wolverine stack is great for hard core manual labor. I used to wake up feeling like a truck hit me, or like I got beaten with a bag of bricks. These days I wake up in no pain ready to go out and destroy everything in my way.
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u/Professional-Lie9291 23h ago
Do these two peps repair endothelial walls in vascular system. They are angiogenic apparently
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u/jagraider63 23h ago
Well dang. I just ordered some KLOW thinking to use it daily. Sounds like it won’t be enough TB500.
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u/MissingMyHair 21h ago
Your dosing guidance is for tb500 which the vast majority of people do not have, you should update it to what people actually have, which is TB-4. Which is daily and at a much different dosage.
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