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c/bpc157·posted 7 months ago by u/asks_dumb_questions

why does nobody talk about sequence

Lab Receipts ×3 Slow Clap ×1

why does nobody talk about sequence. If this has been answered properly somewhere, link me and I will delete.

Assumed regulatory status was static and it was not. Checked again this year and the answer had changed where I live.

Went and read the primary rodent papers after arguing about a summary for a week. They are much narrower than the threads suggest.

Sent a vial to VendorInvestigate: 98.3% against a claimed 97.5%, with the mass confirming the sequence. Both halves mattered to me.

Corrections welcome, especially the pedantic ones. Pedantry is how this board earns its reputation.

1,319 up / 211 down86% upvoted18 commentsid 10dq2512 Dec 2025

18 comments

3 in this archive, depth 2

best — the order this archive was captured in

u/tomas_lehtinen219 points·7 months ago

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.

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u/curious_panel_only193 points·7 months ago

Why identity, not purity, is the test to buy here.

This is a short peptide with a published sequence. Synthesis is not difficult, which means the market is wide and the analytical question shifts. A high area-percent figure tells you the sample is homogeneous; it does not tell you the homogeneous material is the sequence you ordered.

Mass spectrometry, with the theoretical mass alongside the measured one, converts a purity claim into an identity claim. It costs a little more and it answers the question that actually matters. Ask for it, and ask suppliers whether they can provide it before you order — the answers are informative in themselves.

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u/mei_serrano51 points·7 months ago

the tendon claims are the most repeated and the least evidenced

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About c/bpc157

BPC-157 as it actually is: a pentadecapeptide with a genuinely interesting rodent tendon-and-gut literature, near-zero controlled human data, a naming and sequence mess in the supply chain, and a regulatory status that changed sharply in several countries.

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