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

[Vendor] WXT order #18 — the Netherlands, 5 days, no drama, receipts inside

Math Cold Box ×9 Well Actually ×1 Receipts ×1

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

The claim: concentration matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 6 months without either producing anything.

What would actually settle it is 31 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.

3,335 up / 730 down82% upvoted56 commentsid 14e01p11 Jun 2025

56 comments

17 in this archive, depth 4

best — the order this archive was captured in

u/yusuf_nakamura344 points·1 year ago
four days. it took four days for me.
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u/iman_falk200 points·1 year ago

Did you write the concentration on the vial?

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u/aleksi_lehtinen111 points·1 year ago·edited

Did you write the concentration on the vial?

Yes, exactly this, and it is the bit that took me 2 weeks to accept.

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u/lurker_for_years120 points·1 year ago

Show the arithmetic. Where did the units come from?

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u/rina_bergstrom39 points·1 year ago

never post a calculation as advice without stating the concentration

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u/zaid_balogun27 points·1 year ago

What was the vial size and how much bac water?

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u/oskar_kaufmannOP15 points·1 year ago

What was the vial size and how much bac water?

Adding to this: bacteriostatic water is doing more work than the comment implies.

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u/runa_grimaldi118 points·1 year ago

I am going to push back on this slightly.

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u/anjali_tamm81 points·1 year ago

i am begging people to write down the concentration

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u/alcohol_aversion29 points·1 year ago

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

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u/bruno_dumitru95 points·1 year ago

20mg vial, 2mL water, concentration is 20/2 — write it on the vial afterwards

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u/priya_guerrero80 points·1 year ago

Water content matters more than people think. If a vial is carrying residual moisture, your "10mg" is not 10mg of peptide.

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u/aurel_boateng53 points·1 year ago
search before post, but also, welcome
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u/swirl_dont_shakereconstitution31 points·1 year ago

10mg vial, 2mL water, concentration is 10/2 — write it on the vial afterwards

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u/britta_nakamura0 points·1 year ago

swirl, do not shake, or you are courting oxidation

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u/mateusz_achebe1 point·1 year ago

dead space is real and the syringe matters

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u/vial_math_veraMOD1 point·1 year ago

Flair changed to match the content. Read the sidebar before posting next time and we are square.

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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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