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c/reconstitution·posted 1 year ago by u/runa_grimaldi

reconstitution — my 21-week log, condensed into one table

PSA Long Haul ×3 Sourced ×2

I have had 17 orders now and I keep a table, so here is the honest summary rather than a vibe.

Material has been consistent. Communication has not. Shipping has varied by about 20 days on nominally the same lane, which matters more in summer than in February.

The independent number came back 93.7% against a claimed 99.1%, which I read as agreement rather than a discrepancy — inter-lab variance on this assay is a point or two either way and treating one lab as ground truth is how people end up in pointless arguments with vendors.

Batch number is in the comments. Ask if you want the method.

13,985 up / 12,265 down53% upvoted34 commentsid 143xai9 Mar 2025

34 comments

21 in this archive, depth 6

best — the order this archive was captured in

u/honest_syringe_2025226 points·1 year ago

dosing errors come from people reconstituting two vials differently and forgetting which is which

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u/bac_water_banditMOD116 points·1 year ago·edited

Retitled to remove editorialising. Put the evidence in the body.

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u/cesar_ivaturi156 points·1 year ago·edited

u-100 syringe, not u-40, or your math is off by factor of 17

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u/runa_grimaldiOP-5 points·1 year ago

Cored the stopper on my 12th draw because I kept using the same entry point. Rotate the puncture site.

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u/saskia_rahimi163 points·1 year ago

Is that 30mg vial or 28mg?

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u/erez_perrin73 points·1 year ago

Is that 30mg vial or 28mg?

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

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u/swirl_dont_shakereconstitution19 points·1 year ago

show your working or it is unhelpful

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u/santiago_ndiaye5 points·1 year ago

That is net peptide content, not purity. Different number, different meaning.

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u/runa_grimaldiOP3 points·1 year ago

Is that 10mg vial or 8mg?

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u/arne_restrepo2 points·1 year ago

This is correct. 1mL versus 23mL is the common mistake.

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u/iman_falk57 points·1 year 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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u/ines_lindqvist116 points·1 year ago·edited

Cosigning. The concentration on the vial in marker is load-bearing.

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u/alcohol_aversion49 points·1 year ago

Dead space ate 19 units on a low-volume draw. Tiny impact at 2.4mg, massive impact at 1.7mg.

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u/arne_restrepo58 points·1 year ago

i am begging people to write down the concentration

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u/ruben_cabrera45 points·1 year ago

What was the vial size and how much bac water?

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u/runa_grimaldiOP24 points·1 year ago

dead space is real and the syringe matters

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u/wanjiru_varga16 points·1 year ago

show your working or it is unhelpful

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u/alcohol_aversion85 points·1 year ago

Show the arithmetic. Where did the units come from?

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u/ines_ekstrom42 points·1 year ago

show your working or it is unhelpful

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u/niels_roos11 points·1 year ago

show your working or it is unhelpful

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

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About c/reconstitution

The arithmetic and the technique. Bacteriostatic versus sterile water, reconstitution volume as a concentration choice, converting mg/mL into insulin-syringe units, dead space, swirl-not-shake, stopper coring, and how long a reconstituted vial is actually good for. Math errors get corrected fast and politely.

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