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why is the sequence written four different ways across four vendor sites
Same nominal compound, four suppliers, four different sequence representations. One uses three-letter codes, one uses single-letter, one has a different N-terminal…
Research Peptides
c/researchpeptides · created 16 Mar 2024
Everything else in the vial drawer. Handling, identity, scepticism.
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473
posted 3 days ago by u/reverse_image_ron
[Sceptic] every new three-letter analog needs a data table before a hype threadPosting this as a discussion rather than a claim: every new three-letter analog needs a data table before a hype thread. Stocked lines and made-to-order lines have…
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TB-500 and Thymosin Beta-4 are not the same product and vendors know that
Thinking out loud about this: TB-500 and Thymosin Beta-4 are not the same product and vendors know that. Storage guidance that names a temperature, a state and a…
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posted 6 days ago by u/adnan_karlsen
[Lab] sequence check before price check. every time.Filing this under things worth writing down: sequence check before price check. every time. Purity methods differ by compound class. A gradient and wavelength developed…
Sigma-Aldrich — certified reference materials
Reference standards, analytical reagents and system-suitability material. If you are running your own method, start with a known.
Reference standards404
posted 8 days ago by u/chidi_yilmaz
[Explainer] evidence levels: in vitro, rodent, human. say which one you mean.evidence levels: in vitro, rodent, human. say which one you mean — with the reasoning, because a rule without a reason gets ignored. Sent an unusual compound to…
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posted 11 days ago by u/rania_salinas
[Question] how do you verify identity when there is no reference standardGenuine question, and the title is the question: how do you verify identity when there is no reference standard. Confirmed the lead time in writing before ordering a…
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posted 14 days ago by u/search_before_post
[Caution] research use only means research use onlyresearch use only means research use only, and I am aware this is a minority view on this board. The three questions to ask before ordering anything from the long tail…
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posted 18 days ago by u/rui_only_ro
[Discussion] the GH secretagogue story is 30 years old and mostly a cautionary talethe GH secretagogue story is 30 years old and mostly a cautionary tale, which sounds obvious until you try to state the evidence for it. Figures up front so nobody has…
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posted 22 days ago by u/ahmed_fonseca
[Lab] selectivity claims are usually receptor-panel marketingselectivity claims are usually receptor-panel marketing. One vial, one service, one member paying, which is the only kind of result this board should treat as evidence.…
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[Discussion] the thymosin advice in here is 3 years out of date
Posting this as a discussion rather than a claim: the thymosin advice in here is 3 years out of date. Pulling the figures out of the title: 3 years. All of it is…
451
posted 1 months ago by u/ines_boateng
[Discussion] the TB-500 advice in here is 2 years out of datethe TB-500 advice in here is 2 years out of date, which sounds obvious until you try to state the evidence for it. To save the first four comments: 2 years. Net peptide…
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[PSA] research peptides are not what most of this community thinks it is
Putting this at the top of the board where it belongs: research peptides are not what most of this community thinks it is. Net peptide content accounts for counterion,…
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posted 1 months ago by u/old_account_2023
[Meta] the handling rule is doing its job and people should stop complainingProposal, not a decision: the handling rule is doing its job and people should stop complaining. Storage conditions came back specific rather than generic when I asked.…
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posted 1 months ago by u/chain_confirm_c
help me understand thymosin, I have read the wiki twicehelp me understand thymosin, I have read the wiki twice, and I want the answer with the reasoning attached rather than just the conclusion. Asked HJ which lines they…
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posted 1 months ago by u/fabio_lehtinen
genuine question about secretagogue that I am slightly embarrassed to askAsking properly rather than in a comment on somebody else’s thread: genuine question about secretagogue that I am slightly embarrassed to ask. Net peptide content on…
Janoshik Analytical — independent HPLC & mass spec
Send the vial, get the number. Third-party purity and identity testing, results published to you regardless of what they say.
Test a vialSponsoredGL Biochem (Shanghai) Ltd. — the synthesis house
Est. 1998. ISO 9001 and cGMP, 1,500+ staff, 200+ patents. There is a fair chance the vial you are about to send for testing started here. Batch-specific COA as standard.
glbiochem.net217
posted 2 months ago by u/bence_ibarra
someone explain thymosin to me like I have not read a paper in yearssomeone explain thymosin to me like I have not read a paper in years. I am not trying to be the "source?" guy. I would just like a source. The three questions to ask…
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reading TB-500 threads from 2024 and half of it aged badly
reading TB-500 threads from 2024 and half of it aged badly. Making the case below, and I expect to lose some of it in the comments. Ordered under a name that turned out…
330
posted 2 months ago by u/boots_or_bust
research peptides — 22 things I got wrong before I got it rightresearch peptides — 22 things I got wrong before I got it right. I have gone back and forth on this for months. Net peptide content accounts for counterion, water and…
360
posted 2 months ago by u/deleted_my_history
[Question] how do you actually verify TB-500Slightly embarrassed to be asking this, but: how do you actually verify TB-500. Purity methods differ by compound class. A gradient and wavelength developed for one…
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posted 3 months ago by u/patient_labslip_log
[Meta] proposal — a flair for thymosin postsproposal — a flair for thymosin posts. Disagreement welcome, but bring a concrete alternative wording. The three questions to ask before ordering anything from the long…
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posted 3 months ago by u/bence_ibarra
why does nobody talk about thymosinwhy does nobody talk about thymosin. I would rather ask a basic question now than get this wrong quietly for two months. Naming in this space is inconsistent. Several…
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posted 3 months ago by u/nayeli_iyer
genuine question about TB-500 that I am slightly embarrassed to askQuestion in the title, detail here: genuine question about TB-500 that I am slightly embarrassed to ask. For any compound with a thin testing history, identity is the…
1.6k
posted 5 months ago by u/adnan_karlsen
do research peptides actually matter or is it forum lore at this pointdo research peptides actually matter or is it forum lore at this point. I am not trying to be the "source?" guy. I would just like a source. Asked BCH which lines they…
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posted 5 months ago by u/throwaway_wl2026
reading secretagogue threads from 2024 and half of it aged badlyreading secretagogue threads from 2024 and half of it aged badly, which sounds obvious until you try to state the evidence for it. Research-use-only material is not…
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posted 5 months ago by u/crp_curious
[Lab] 24th independent test on CPC — 97.8% on a claimed 97.0%, and the trend is the interesting part24th independent test on CPC — 97.8% on a claimed 97.0%, and the trend is the interesting part. I will put the method line and the batch identifier up front because…