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?
Archived. This submission is more than a year old. Votes and new comments are closed, and some of the advice in it may have been superseded — check the community wiki for the current version.
2.3k
c/reconstitution·posted 2 years ago by u/sigrid_kaufmann

week 91 check-in — 26kg down, fatigue manageable, one thing confusing me

Explainer Receipts ×1 Well Actually ×2

Right, the insulin syringe question again, but with numbers this time.

I have 18 data points over 6 weeks. The pattern is consistent enough that I do not think it is chance, and boring enough that nobody is going to screenshot it, which is usually a good sign.

The thing I would flag for anyone new: the effect I am describing showed up at week 29, not week 78. People give up long before the interesting part.

Interested in whether this matches other people's logs or whether I am an outlier.

3,644 up / 1,310 down74% upvoted35 commentsid 1kdmci26 Sep 2023

35 comments

21 in this archive, depth 5

best — the order this archive was captured in

u/spain_receta367 points·2 years ago·edited

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

replysharereportpermalink
u/dexa_twice_yearlybody comp298 points·2 years ago·edited

more water means more units for the same dose, which means finer resolution

replysharereportpermalink
u/emeka_delgado181 points·2 years ago

stopper coring on the 9th draw because you keep using the same entry point. rotate.

replysharereportpermalink
[deleted]133 points·2 years ago

[deleted]

replysharereportpermalink
u/nabila_espinoza58 points·2 years ago

Not to be pedantic but reconstitution and mg/mL are being used interchangeably and they are not interchangeable in real life.

replysharereportpermalink
u/bruno_dumitru111 points·2 years ago·edited

This is correct. 2mL versus 3mL is the common mistake.

replysharereportpermalink
u/georgi_adebayo0 points·2 years ago

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

replysharereportpermalink
u/ilias_steiner1 point·2 years ago

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

Disagree on that part. 98.4% and 98.3% on the same vial is normal.

replysharereportpermalink
u/spain_receta1 point·2 years ago

show your working or it is unhelpful

replysharereportpermalink
u/sofia_danquah1 point·2 years ago

show your working or it is unhelpful

Yes, exactly this, and it is the bit that took me 33 weeks to accept.

replysharereportpermalink
u/emeka_delgado1 point·2 years ago

dead space is real and the syringe matters

replysharereportpermalink
u/andres_sorensen53 points·2 years ago

Cored the stopper on my 22th draw because I kept using the same entry point. Rotate the puncture site.

replysharereportpermalink
u/katrin_marchetti12 points·2 years ago

u-100 syringe, not u-40, or your math is off by factor of 11

replysharereportpermalink
load more comments (1) →
u/anjali_tamm99 points·2 years ago

What was the vial size and how much bac water?

replysharereportpermalink
u/sigrid_kaufmannOP-30 points·2 years ago

Spent 14 weeks confused about concentration math until someone showed me the table. 30mg, 2mL, concentration is 30/2.

replysharereportpermalink
u/swirl_dont_shakeMOD55 points·2 years ago

Tracking number removed. It identifies both ends of a shipment.

replysharereportpermalink
u/yusuf_nakamura15 points·2 years ago

Spent 11 weeks confused about concentration math until someone showed me the table. 20mg, 2mL, concentration is 20/2.

replysharereportpermalink
u/hedda_adeyemi5 points·2 years ago

Slight fix: the number was 99.1, not 93.7. Decimal point, but a fairly consequential one.

replysharereportpermalink
u/iman_falk80 points·2 years ago

never post a calculation as advice without stating the concentration

replysharereportpermalink
u/britta_nakamura32 points·2 years ago

Yeah, showing the arithmetic is the fastest way for someone to spot the error.

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

PeptideMeter Analytics

Independent testing plus vendor-level trend data. Community-funded, unaffiliated.

peptidemeter.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.