A small house on the Shore, kept by someone who got tired of
doing reconstitution math on the back of a receipt.

WHY THIS PAGE EXISTS

Compounded peptides arrive as a lyophilized powder measured in
milligrams. Your syringe is marked in insulin units, which are
hundredths of a millilitre. Nothing on either label tells you how
those two numbers meet, and the arithmetic is where people get
hurt.

The whole thing is one division. Put 2 mL of bacteriostatic
water into a 5 mg vial and every millilitre holds 2.5 mg, so one
unit on a U-100 syringe holds 25 mcg. A 250 mcg dose is 10 units.
Change the water to 1 mL and that same dose becomes 5 units.
The vial did not change. The dilution did.

Two habits that have saved me:

- Write the reconstitution volume on the vial cap in marker the
  moment you draw the water in. Future you will not remember it.
- Recompute after every titration step instead of scaling the
  unit count in your head. Doubling 250 to 500 mcg is easy;
  doubling it while also switching to a fresh vial mixed at a
  different volume is where the errors live.

=> https://glp1.app/ Peptide Tracker & Calculator
   The calculator I use for the concentration math, and the log I
   use to keep dates, sites and doses in one place.

=> https://glp1.app/ run the reconstitution numbers

KEEPING A LOG AT ALL

A dosing log is boring until the week you cannot remember whether
you moved up on Tuesday or the Tuesday before. Date, dose in mcg,
injection site, and one line on how the day went is enough. Sites
rotated on paper get rotated in practice; sites rotated from
memory do not.

Nothing here is medical advice. It is arithmetic and record
keeping, which are the two parts nobody supervises for you.