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Compounds · Repair & healing peptides · continued

Reading a preclinical wound-healing model and its relevance to a human tendon posts 121–150

This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.

NN
n.nybergTL2 Moderator22 Nov 2024#121

Worth separating two things that post #117 runs together.

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

14 likes 20mo
CL
c.lundgrenTL223 Nov 2024#122
CC
c.cardosoTL2 Moderator23 Nov 2024#123

Publication patterns in the BPC-157 literature: a large proportion of the evidence comes from one research group. That is not necessarily wrong — one group can do excellent work — but it is worth noting when evaluating the breadth of support for a claim.

0 likes 20mo
ML
m.lehtinenTL2 Moderator23 Nov 2024#124

For anyone arriving from search engines: this subcategory discusses published preclinical work and the absence of published clinical work. It does not endorse or recommend these compounds.

0 likes 20mo
DO
dr_okonkwoTL4 Moderator23 Nov 2024#125

BPC-157: the preclinical literature is extensive, mostly from a small number of research groups, and reports effects across a wide range of injury models. The breadth of reported effects is itself worth noting — a compound that improves outcomes in tendon, muscle, gut, nerve and bone through a single mechanism would be remarkable, and remarkable claims deserve proportionate scrutiny.

9 likes 20mo
CG
c.grimaldiTL2 Moderator23 Nov 2024#126
Knowlton, post #70: Worth separating two things that post #66 runs together. The distinction between "no evidence it works" and "evidence it does not work": we have the first for these compounds. That is genuinely different from the second and the distinction matters, but it also means treatment plans based on these compounds are being built on theoretical… Go to post

post #125 answers the question as asked. The question underneath it is different.

The distinction between "no evidence it works" and "evidence it does not work": we have the first for these compounds. That is genuinely different from the second and the distinction matters, but it also means treatment plans based on these compounds are being built on theoretical grounds, not empirical ones.

2 likes in reply to #70 20mo
PW
PharmNotes_WhitfieldTL4Pharmacist23 Nov 2024#127
ms_holloway, post #42: Why plausible mechanism is not evidence of effect: a mechanism that is chemically or biologically plausible can fail in practice for dozens of reasons — bioavailability, off-target effects, metabolism, clearance, or simply that the mechanism does not do what the theory predicts in a living system. Plausibility is necessary for hope but… Go to post

For anyone arriving from search engines: this subcategory discusses published preclinical work and the absence of published clinical work. It does not endorse or recommend these compounds.

0 likes in reply to #42 20mo
JF
j.fonsecaTL2 Moderator23 Nov 2024 · edited#128

For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.

29 likes 20mo
FL
f.laurentTL223 Nov 2024#129
CW
cohort_watchTL2Member23 Nov 2024#130

TB-500 is usually the 7-residue actin-binding fragment of thymosin beta-4, not the full 43-residue protein. The two are routinely conflated in supplier documentation and in the literature. Evidence about the full protein does not automatically apply to the fragment.

1 like 20mo
NZ
n.zielinskiTL2 Moderator24 Nov 2024#131

This follows post #128 rather than contradicting it.

What would change the position on repair peptides: adequately powered, published, peer-reviewed randomised controlled human trials with pre-specified outcomes. That is the standard applied to every other therapeutic claim on this site and it is the standard applied here.

22 likes 20mo
M
MJayawardenaTL3Regular24 Nov 2024#132

I read post #130 twice before replying, because I had assumed the opposite.

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

0 likes 20mo
MB
ma.balogunTL2 Moderator24 Nov 2024#133

Oral versus injected administration claims for BPC-157: the preclinical work studied injection. Oral claims are common in supplier marketing and poorly supported by published evidence. If you are comparing orality between compounds, that is a distinction worth noting.

1 like 20mo
D
DOdendaalTL3Regular24 Nov 2024#134
c.draganov, post #110: This follows post #107 rather than contradicting it. BPC-157: the preclinical literature is extensive, mostly from a small number of research groups, and reports effects across a wide range of injury models. The breadth of reported effects is itself worth noting — a compound that improves outcomes in tendon, muscle, gut, nerve and bone… Go to post

Reading a preclinical wound-healing model: the model shows whether a mechanism is plausible in a specific context. It does not show magnitude of effect in humans, does not show safety profile in humans, and does not show whether the effect survives in a more complex biological system. That is not a criticism of preclinical work — it is what preclinical work is for.

6 likes in reply to #110 20mo
RI
r.ilungaTL224 Nov 2024#135
ED
e.dalgleishTL3Regular24 Nov 2024 · edited#136

Coming back to post #134, because the follow-up matters more than the original answer.

Publication patterns in the BPC-157 literature: a large proportion of the evidence comes from one research group. That is not necessarily wrong — one group can do excellent work — but it is worth noting when evaluating the breadth of support for a claim.

31 likes 20mo
ER
e.roosTL2 Moderator24 Nov 2024#137
d.szymanski, post #97: Coming back to post #95, because the follow-up matters more than the original answer. Reading a preclinical wound-healing model: the model shows whether a mechanism is plausible in a specific context. It does not show magnitude of effect in humans, does not show safety profile in humans, and does not show whether the effect survives in… Go to post

Analytical identity of BPC-157: a 15-residue peptide with an unambiguous mass (≈1419.5 Da). Identity confirmation by LC-MS is trivially easy, which means there is no excuse for an unverified identity on this compound.

0 likes in reply to #97 20mo
SG
s.grahameTL2Member24 Nov 2024#138
j.fonseca, post #128: For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use. Go to post

Why plausible mechanism is not evidence of effect: a mechanism that is chemically or biologically plausible can fail in practice for dozens of reasons — bioavailability, off-target effects, metabolism, clearance, or simply that the mechanism does not do what the theory predicts in a living system. Plausibility is necessary for hope but not sufficient for evidence.

3 likes in reply to #128 20mo
EC
e.coelhoTL2 Moderator24 Nov 2024#139

Stability of BPC-157 in solution: what has been measured in published work covers specific formulations under specific conditions. Extrapolating to a reconstituted preparation in a different diluent at a different concentration is an extrapolation, acknowledged as one.

10 likes 20mo
FA
f.abrahamsenTL2Member25 Nov 2024#140

Publication patterns in the BPC-157 literature: a large proportion of the evidence comes from one research group. That is not necessarily wrong — one group can do excellent work — but it is worth noting when evaluating the breadth of support for a claim.

23 likes 20mo
AN
a.nascimentoTL225 Nov 2024#141
KB
k.brandl_deTL3Translator · DE25 Nov 2024#142
s.kuusela, post #59: On post #55 — agreed on the reasoning, with one qualification. Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had been repeating something I had not checked carefully enough. Go to post

Picking up post #139: that is the part I would want checked first.

What would change the position on repair peptides: adequately powered, published, peer-reviewed randomised controlled human trials with pre-specified outcomes. That is the standard applied to every other therapeutic claim on this site and it is the standard applied here.

0 likes in reply to #59 20mo
AT
a.teixeiraTL2 Moderator25 Nov 2024 · edited#143

On post #139 — agreed on the reasoning, with one qualification.

BPC-157: the preclinical literature is extensive, mostly from a small number of research groups, and reports effects across a wide range of injury models. The breadth of reported effects is itself worth noting — a compound that improves outcomes in tendon, muscle, gut, nerve and bone through a single mechanism would be remarkable, and remarkable claims deserve proportionate scrutiny.

26 likes 20mo
RF
resistance_firstTL2Regular25 Nov 2024#144

Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the kind that comes from remembering a figure instead of looking it up.

13 likes 20mo
CH
c.haddadTL2 Moderator25 Nov 2024#145
b.dumitru, post #107: On post #103 — agreed on the reasoning, with one qualification. Why plausible mechanism is not evidence of effect: a mechanism that is chemically or biologically plausible can fail in practice for dozens of reasons — bioavailability, off-target effects, metabolism, clearance, or simply that the mechanism does not do what the theory… Go to post

Analytical identity of BPC-157: a 15-residue peptide with an unambiguous mass (≈1419.5 Da). Identity confirmation by LC-MS is trivially easy, which means there is no excuse for an unverified identity on this compound.

2 likes in reply to #107 20mo
PN
plateau_notesTL2Regular25 Nov 2024#146

Stability of BPC-157 in solution: what has been measured in published work covers specific formulations under specific conditions. Extrapolating to a reconstituted preparation in a different diluent at a different concentration is an extrapolation, acknowledged as one.

0 likes 20mo
NV
n.vukovicTL2 Moderator25 Nov 2024#147
c.ostergaard, post #28: Oral versus injected administration claims for BPC-157: the preclinical work studied injection. Oral claims are common in supplier marketing and poorly supported by published evidence. If you are comparing orality between compounds, that is a distinction worth noting. Go to post

Worth separating two things that post #143 runs together.

Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing.

The correction was fair and I had been repeating something I had not checked carefully enough.

19 likes in reply to #28 20mo
AD
appeals_deskTL3Regular25 Nov 2024#148

post #147 is right about the mechanism and I think understates the practical bit.

Why plausible mechanism is not evidence of effect: a mechanism that is chemically or biologically plausible can fail in practice for dozens of reasons — bioavailability, off-target effects, metabolism, clearance, or simply that the mechanism does not do what the theory predicts in a living system. Plausibility is necessary for hope but not sufficient for evidence.

8 likes 20mo
YR
y.rahimiTL2 Moderator26 Nov 2024#149

The distinction between "no evidence it works" and "evidence it does not work": we have the first for these compounds. That is genuinely different from the second and the distinction matters, but it also means treatment plans based on these compounds are being built on theoretical grounds, not empirical ones.

12 likes 20mo
P
preregisteredTL326 Nov 2024#150