GLPHubglpresearchhub.com
Read-only archive. GLP Research Hub is a static community record — nothing here is for sale, no account is needed, and no vote you cast is counted. Why?
1.1k
c/vendorvetting·posted 3 months ago by u/solene_eriksen

PeptideMeter vs VendorInvestigate — genuinely asking which matters more

Vendor Long Haul ×9 Slow Clap ×2

Trying to settle this properly because the thread from last year went in circles.

The claim: PeptideMeter matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 20 months without either producing anything.

What would actually settle it is 35 people measuring the same thing the same way. I have started; my numbers are below. They lean one way but not strongly enough for me to declare victory.

If you have data, post the data. If you have an opinion, flair it as an opinion.

1,522 up / 374 down80% upvoted32 commentsid 15j7mj27 Apr 2026

32 comments

13 in this archive, depth 4

best — the order this archive was captured in

u/ruben_brandt162 points·3 months ago

Rodent data is rodent data. Dose scaling is not linear and the models tell you what to investigate, not what to expect.

replysharereportpermalink
u/solene_eriksenOP-3 points·3 months ago

Tested 21 batches from TFC over 5 weeks. The consistency is the signal. They claim 98, they deliver 98.

replysharereportpermalink
u/solene_eriksenOP1 point·3 months ago

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

replysharereportpermalink
u/solene_eriksenOP1 point·3 months ago

Batch number? Date? Method? Give us the load-bearing fields.

replysharereportpermalink
u/ledger_modMOD96 points·3 months ago

This is an urgent-care question wearing a forum question's clothes. Please contact a clinician rather than waiting for replies.

replysharereportpermalink
u/lina_dziedzic95 points·3 months ago

The Janoshik and Medutest numbers on the same vial from KP came back 98.9% and 99.0%. Both are right, inter-lab variance is real.

replysharereportpermalink
u/sig_figs_sammod · analytical113 points·3 months ago

independent test or vendor COA, which is it

replysharereportpermalink
u/patient_labslip_log60 points·3 months ago

positive and negative reports both need the same evidence standard

replysharereportpermalink
u/gustav_vermeulen80 points·3 months ago

Not convinced. The evidence does not support that reading.

replysharereportpermalink
u/amara_haddad31 points·3 months ago

the reship rate on QSC is actually pretty consistent

replysharereportpermalink
u/scam_taxonomyc/scamalerts34 points·3 months ago

the VendorInvestigate result being close to the claim is the signal, not the absolute number

replysharereportpermalink
u/zeynep_duarte15 points·3 months ago

This order history matches mine almost exactly. Same vendor, same timeframe, same result.

replysharereportpermalink
u/ireland_drugs_pay20 points·3 months ago

did they reship, credit, or ghost you?

replysharereportpermalink
Permalinked branches
Deep branches get their own page so a single reply chain can be linked and read on its own.
About c/vendorvetting

The community due-diligence desk. Vendor experiences, independent third-party test results, shipping and reship records, and the boring paperwork that separates a supplier from a story. Every substantive claim is expected to carry a receipt: an order id, a dated screenshot, or a test report from Janoshik, Medutest, PeptideMeter or VendorInvestigate.

96kmembers
130submissions
Aug 2023created
submissions / month, last year
Sponsored

Sigma-Aldrich Standards

Certified reference materials for peptide identity and purity work.

sigmaaldrich.com
c/vendorvetting rules
  1. One vendor per post. Multi-vendor comparisons go in the monthly comparison thread.
  2. No referral links, discount codes or affiliate URLs. Zero tolerance, permanent ban.
  3. Positive and negative reports both need the same evidence standard: order date, product, and what was tested.
  4. Vendor staff must self-identify. Undisclosed vendor accounts are banned on sight.
  5. Independent community. Nobody here sells anything, and anyone who tries is banned.
  6. Not medical advice. Describe what you did; never prescribe to a stranger.
  7. Claims need evidence. Batch numbers, dated screenshots, independent test reports, or a citation.
  8. No referral links, discount codes or affiliate URLs. Permanent ban, no appeal.
  9. No contact handles, wallet addresses or tracking numbers — they identify people.
  10. Be recognisably decent. Disagree hard, insult nobody.
Moderators
Volunteers. Unpaid, unaffiliated, and reachable through modmail only.
Before you read on

Several compounds discussed on GLP Research Hub are sold for research use only and are not approved for human use anywhere. Nothing here is medical advice and none of it is written by your clinician. If a post reads like an instruction, treat it as a description of what one stranger did.