tendon: what the trials say vs what this community says
tendon: what the trials say vs what this community says — a position I have arrived at slowly and would like tested.
The evidence base, described honestly, which almost no summary of it does.
The published literature is overwhelmingly preclinical and largely in rodent models. The individual papers are generally more modest in their claims than the summaries that circulate. Human clinical trial evidence for the claims most often repeated in these threads is very limited.
That is not an argument that nothing is happening in the preclinical work — some of it is genuinely interesting. It is an argument that the distance between "this happened in a rodent model" and "this will happen in a person" is large, uncertain, and crossed silently in nearly every confident post on this board, including some of mine from two years ago.
Purity by area percent tells you the sample is homogeneous. Mass spectrometry tells you what the homogeneous thing is. For a short peptide, the second question is the one worth paying for.
It is a fifteen-residue peptide with a published sequence, which makes synthesis straightforward and makes identity verification the meaningful test rather than an optional extra.
If somebody has the same thing measured a different way, post it next to mine and we will see whether they agree.
best — the order this archive was captured in
Short peptides in solution are subject to hydrolysis and, depending on sequence, oxidation. Storage state and time in solution are practical variables that this board almost never discusses.
Short peptides in solution are subject to hydrolysis and, depending on sequence, oxidation.
Agreed — and the preclinical to clinical gap is where nearly all the overclaiming happens.
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That is a purity figure, not an identity confirmation. Two different tests and only one answers the question asked.
Careful. Regulatory status differs by jurisdiction and has changed; a confident global statement is going to be wrong somewhere.
Correcting myself: I said the regulatory position had not changed and in that jurisdiction it has.
Correction: that study was in rodents. Worth stating explicitly since the thread has been reading it as clinical.
Paid for identity confirmation rather than just purity for the first time here. Worth it, and it is not the default on most certificates.
That claim traces back to a single preclinical paper that says something considerably narrower.
Small fix — fifteen residues, not seventeen. The sequence is public and easy to check.
no clinical trial has established what these threads assert
pentadecapeptide, fifteen residues, and the sequence is public
Same. Solution stability is the practical question and almost nobody asks it.
Right, and regulatory status has genuinely moved in several jurisdictions. Answers from three years ago may be wrong now.
the human evidence is thin and the rodent evidence is not
Went and read the primary rodent papers after arguing about a summary for a week. They are much narrower than the threads suggest.
Bought small, tested identity first, and only then thought about anything else. That order felt right.
regulatory status varies by jurisdiction and it has moved recently
identity, quantity, stability — three separate questions
Research-use-only material is not approved for human use. In this board that is not a formality — it is the reason the clinical evidence base is as thin as it is.
most of the claims here trace to the same handful of rodent papers
The published literature is overwhelmingly preclinical, largely in rodent models. Translating a rodent result into a human expectation is not a small step, and almost every confident claim here takes it silently.
Disagree — that is a rodent study and you are stating it as a human effect. The distance between those is the entire argument.
Cosigning that the papers are more modest than the summaries of them. That is true across this whole site and especially here.
Added a jurisdiction tag to the regulatory question. The answer differs and has changed.
read the actual papers, they are more modest than the summaries
I would not extrapolate a mechanism from a model system to a person in one step, which is what that comment does.
I would not extrapolate a mechanism from a model system to a person in one step, which is what that comment does.
Adding the standing caveat — research material is not approved for human use, wherever you are.
Has anyone posted an independent result on that batch?
- 1Paid for identity confirmation rather than just purity for the first time…13 comments in this branch · started by u/neha_rahimi