Guides
The ideas behind the numbers — short, factual explanations of what the calculators are doing and the terms the compound pages use.
4 min readBacteriostatic water: what it is, and how much to useWhat bacteriostatic water is, how it differs from sterile water and saline, and how the volume you add sets the concentration of a mixed vial.Read 5 min readHalf-life, steady state, and how often a compound is dosedWhat a compound's half-life is, how steady state and accumulation follow from it, and why some compounds are described on weekly schedules and others daily.Read 6 min readStoring peptides: before and after mixing, and why cold chain mattersHow to store freeze-dried peptide powder and a mixed vial, how heat and time lower what is left in the vial, and why cold-chain shipping matters.Read 5 min readUnits, millilitres and micrograms: reading an insulin syringeWhy an insulin syringe is marked in units rather than millilitres, how units, mL, mcg and mg relate, and the arithmetic mistakes that change a dose tenfold.Read 6 min readCertificates of analysis: what purity testing actually showsHow to read a peptide certificate of analysis — HPLC purity, mass spectrometry identity, water content and what the document does not cover.Read 4 min readSubcutaneous sites, and why they are rotatedWhat the subcutaneous layer is, why most research peptides are described as subcutaneous, which areas are used, and the reason a site is never used twice in a row.Read 4 min readCycles and breaks: why schedules run for weeks and then stopWhy research protocols are described in cycles of a few weeks with a break after, what receptor downregulation and tolerance mean, and how a break changes the maths.Read