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?
1.4k
c/reconstitution·posted 10 months ago by u/sock_puppet_spotter

mg/mL: the version I wish someone had shown me in week 1

Correction Slow Clap ×5 Receipts ×1

Posting this because I searched for it and got nothing useful.

Setup: 7.5mg, week 54, sulphur burps present but not ruining anything. I changed exactly one variable — insulin syringe — and tracked it for 2 weeks.

Result: a difference, but a small one, and well inside what I would call noise if someone else posted it. So I am putting it here rather than presenting it as a finding. If two or three other people have done the same thing we might actually learn something.

Not medical advice, obviously. This is one person with a spreadsheet.

1,780 up / 363 down83% upvoted47 commentsid 15s17o5 Sep 2025

47 comments

16 in this archive, depth 6

best — the order this archive was captured in

u/emeka_delgado155 points·10 months ago

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

replysharereportpermalink
u/marta_weiss107 points·10 months ago

Dead space ate 6 units on a low-volume draw. Tiny impact at 1.0mg, massive impact at 1.7mg.

replysharereportpermalink
u/sock_puppet_spotter59 points·10 months ago

bacteriostatic and sterile water are not interchangeable, do not use them that way

replysharereportpermalink
u/escrow_evangelist124 points·10 months ago

This is the "correlation is mechanism" thing again. You changed three variables at once.

replysharereportpermalink
u/aleksi_lehtinen44 points·10 months ago

show your working or it is unhelpful

replysharereportpermalink
u/oskar_kaufmann27 points·10 months ago

dead space is real and the syringe matters

replysharereportpermalink
u/spain_receta-23 points·10 months ago

Sceptical. If this were true we would see it reflected in the data and we do not.

replysharereportpermalink
u/vial_math_verasyringe math1 point·10 months ago

the concentration on the vial in marker is the most important step

replysharereportpermalink
u/elodie_grimaldi1 point·10 months ago

the concentration on the vial in marker is the most important step

Disagree on that part. 97.4% and 96.2% on the same vial is normal.

replysharereportpermalink
u/freya_onwuka1 point·10 months ago

Small correction: the trial was 5 weeks, not 3. Does not change your point but people will quote it.

replysharereportpermalink
u/swirl_dont_shakereconstitution1 point·10 months ago

never post a calculation as advice without stating the concentration

replysharereportpermalink
u/ledger_modmod · vetting1 point·10 months ago

never post a calculation as advice without stating the concentration

Yes, exactly this, and it is the bit that took me 7 weeks to accept.

replysharereportpermalink
u/ines_lindqvist114 points·10 months ago

This is the "correlation is mechanism" thing again. You changed three variables at once.

replysharereportpermalink
u/saskia_mwangi63 points·10 months ago

Disagree but this is the good kind of wrong — it is specific enough to be checked.

replysharereportpermalink
u/sigrid_kaufmann76 points·10 months ago

never post a calculation as advice without stating the concentration

replysharereportpermalink
u/emil_zamora49 points·10 months ago
that is the funniest sentence i have read on this site
replysharereportpermalink
Permalinked branches
Deep branches get their own page so a single reply chain can be linked and read on its own.
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.

88kmembers
130submissions
Aug 2023created
submissions / month, last year
Sponsored

Sigma-Aldrich Standards

Certified reference materials for peptide identity and purity work.

sigmaaldrich.com
c/reconstitution rules
  1. Show your numbers. "How many units?" with no mg and no mL cannot be answered.
  2. Never post a calculation as advice without stating the concentration it assumes.
  3. No sterile-compounding-for-others discussion. Personal handling only.
  4. Independent community. Nobody here sells anything, and anyone who tries is banned.
  5. Not medical advice. Describe what you did; never prescribe to a stranger.
  6. Claims need evidence. Batch numbers, dated screenshots, independent test reports, or a citation.
  7. No referral links, discount codes or affiliate URLs. Permanent ban, no appeal.
  8. No contact handles, wallet addresses or tracking numbers — they identify people.
  9. 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.