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c/vendorvetting·posted 3 months ago by u/aleksi_lehtinen

[Question] the UK — has anyone got a straight answer on testing

Question

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

The claim: vendor matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 24 months without either producing anything.

What would actually settle it is 5 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.

220 up / 244 down47% upvoted13 commentsid 14f97r6 Apr 2026

13 comments

13 in this archive, depth 4

best — the order this archive was captured in

u/throwaway_titration7 points·3 months ago·edited

receipts or nothing, sorry but that is the rule

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u/lane_map_larrylogistics2 points·3 months ago

The confident tone is doing a lot of work that the evidence is not.

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u/bastian_aalto5 points·3 months ago

First order from TFC was great, second one had a different batch and tested lower. The vendor retested and credited me. Logged it here.

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u/matias_falk3 points·3 months ago

Correct. The batch number is load-bearing information, not optional.

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u/boots_or_bust1 point·3 months ago

SWB order #11, Ireland, no drama, receipts inside

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u/britt_zamora4 points·3 months ago

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

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u/pavel_kravchenko3 points·3 months ago

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

Yes, exactly this, and it is the bit that took me 37 weeks to accept.

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u/patient_labslip_log3 points·3 months ago

First order from ERP was great, second one had a different batch and tested lower. The vendor retested and credited me. Logged it here.

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u/dilara_weiss1 point·3 months ago

No. This is the kind of confident post that gets copied into a screenshot and repeated for years. Where is the evidence.

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[removed]1 point·3 months ago

[removed by moderator]

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u/zeynep_villalobos3 points·3 months ago

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

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u/solene_eriksen-20 points·3 months ago

This order history matches mine almost exactly.

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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u/aleksi_lehtinenOP2 points·3 months ago

GGPeps took 6 days to answer an email and the material was flawless. Both of those things are true.

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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.

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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.
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