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MA

u/mariam_cabrera

Contributes reviews on supplier material. Based in Dijon.

member · joined 15 Jun 2025

13,321post karma
6,804comment karma
6submissions
85comments

comment on what does titration actually mean in c/newbiequestions · 1 points · 3 days ago

Disagree. What you are describing is consistent with basics, not with what you concluded.

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comment on peak at 4.2 min, nobody can tell me what it is, ideas in c/hplc · 1 points · 4 days ago

Did they post the raw trace or just the summary?

Yes, exactly this, and it is the bit that took me 93 weeks to accept.

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comment on [PSA] no tracking numbers. they identify both ends. removed on sight. in c/intlshipping · 35 points · 4 days ago

Slight fix: the number was 96.8, not 97.2.

Yes, exactly this, and it is the bit that took me 82 weeks to accept.

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comment on [Lab] three BPC vials, three vendors, purity all over the place in c/bpc157 · 0 points · 4 days ago

Half-life is about 168 hours, so steady state lands around week 20–5. Practical consequence: what you feel in week 1 is not what that dose does.

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comment on bought a second-hand HPLC. worst best decision of my life. AMA in c/hplc · 4 points · 9 days ago

the gradient is doing the separation work, not the column alone

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comment on [Lab] identity confirmed but net peptide content was 71% in c/bpc157 · 9 points · 16 days ago

Three years on this site and the questions have not changed at all. Which is depressing or reassuring depending on the day.

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comment on retention time shifted 0.4 min and nobody wants to talk about it in c/hplc · 22 points · 18 days ago

A shoulder on the main peak that 2 analysts integrated 40 different ways. Same trace, 98.1 spread.

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comment on [Lab] my running table: 34 tests, 11 vendors, three years in c/labresults · 1 points · 19 days ago

Not to be pedantic but batch and test results are being used interchangeably and they are not interchangeable in real life.

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comment on [Below Spec] 88% is not "basically fine" and i am tired of that reply in c/labresults · 27 points · 23 days ago

Tested 14 batches from QST over 90 weeks. Spread was 99.2% to 99.1, mostly 99.2. Consistent vendor.

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comment on integration vs method development — genuinely asking which matters more in c/hplc · 251 points · 24 days ago

Gradient goblin mode: changed the solvent composition 16 times, finally got good resolution on a gradient peak.

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comment on why do people talk about units and mg like they are different things in c/newbiequestions · 20 points · 29 days ago

This is a good question, genuinely.

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comment on someone explain chromatogram to me like I have not read a paper in years in c/hplc · 14 points · 1 months ago

integration decision on a shoulder changes your number by half a point on its own

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comment on is the wiki up to date, and where do i start in it in c/newbiequestions · 17 points · 1 months ago

What does the wiki say?

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comment on [PSA] protein is not what most of this community thinks it is in c/glp1muscle · 0 points · 1 months ago

no supplement selling, no coaching solicitation

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comment on [Lab] SSA BPC — Medutest came back 97.4% against a claimed 96.2% in c/bpc157 · 17 points · 1 months ago

Came off after 16 weeks for financial reasons. Regained about a third over the following year. Back on now at a much lower dose.

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comment on does gradient actually matter or is it forum lore at this point in c/hplc · 38 points · 1 months ago

I am going to push back on this slightly.

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comment on the resistance training question that gets asked weekly, answered properly in c/glp1muscle · 10 points · 1 months ago

resistance training is sarcopenia not optional

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comment on my eGFR moved and I cannot work out whether LC-MS is why in c/hplc · 64 points · 1 months ago

The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.

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