Peptide knowledge base: guides on storage, mixing and equipment
Plain-language guides on storing peptides, reconstitution and units, syringes and pens, plus legal and sport status. No dosing advice, no shops.
Storage & shelf life
Fridge, freezer or room temperature, and how long a vial really lasts.
How to store peptides: powder, solution, fridge and freezer
Peptide storage for powder and reconstituted solution: pharmacopoeial temperature classes, the degradation chemistry, and the 28-day beyond-use rule.
How long do peptides last at room temperature?
Room temperature is a storage class, not a shelf life: the pharmacopoeial temperature bands, and why powder and solution behave differently in heat.
Peptide vial labels, open date and how long a vial lasts
Peptide vial labels and what belongs on them, single-dose versus multiple-dose containers, ISO glass and closure standards, and the two clocks a vial runs.
Storing peptides in a syringe: why you shouldn't pre-draw
Drawing up a peptide hours before you inject it feels efficient, but a filled insulin syringe is a poor place to store it. What leaches, what's lost, and the one simple rule.
Why Did My NAD+ Turn Yellow? Colour, Stability and Storage
What a pale yellow NAD+ solution can and cannot tell you: the colour of the powder and fresh solution, how NAD+ breaks down in water, and what datasheets record.
Reconstitution & units
Bacteriostatic water, mixing ratios and reading units off an insulin syringe.
What is bacteriostatic water? Benzyl alcohol, the USP monograph and where it is used
Bac water explained: what the 0.9% benzyl alcohol in bacteriostatic water does, what the USP monograph and the FDA label say, and where it is used.
How long does bacteriostatic water last? Unopened, opened, and in the fridge
What the label states about storage at 20–25 °C, why a fridge is not part of it, and what the 28-day beyond-use convention means after the first puncture.
1 mL = how many units? Reading a U-100 insulin syringe
On a U-100 syringe 100 units equal 1 mL and one unit equals 0.01 mL. Unit-to-milliliter tables, the 0.3, 0.5 and 1 mL scales, plus U-40 and U-500.
mg, mL and IU: What the Numbers on a Peptide Actually Mean
mg is weight, mL is volume, IU is biological activity. Three different units people mix up all the time. Here is the plain-English difference, with worked examples.
Reconstituting Peptides: Concentration, Water Volume and Storage
What reconstitution means, the mg/mL definition in abstract placeholders, why the liquid volume is a measurement trade-off, and the storage conventions for a mixed vial.
Bacteriostatic water vs sterile water: the real difference
Bacteriostatic water vs sterile water: one keeps a punctured vial usable for weeks, the other for about a day. Why one ingredient, benzyl alcohol, changes everything.
Mixing peptides in one syringe: pH and the peptide crash
Why peptide solutions can turn cloudy the moment they share a barrel: pH, the isoelectric point, salt effects, and how a precipitate is recognised.
Syringe filters for peptide solutions: pore size and membrane
What a 0.22 µm sterilizing-grade syringe filter is rated to retain, which membrane materials keep peptide adsorption low, and what filtration cannot remove.
Reconstituting SLU-PP-332 with DMSO: a documented run with photos
A photographed run: SLU-PP-332 dissolved in DMSO, then added to bacteriostatic water. Why the order matters, what streaks mean, why Ph. Eur. DMSO is not sterile.
Cagrilintide in Solution: pH, Aggregation and Fibrils
An amylin analogue does not behave in water like an ordinary lyophilised peptide. What the pH optimum actually refers to, what a fibril is, and where solubility chemistry stops.
Equipment & syringes
Syringes, needles and pens — what to pick and how to use it.
Syringe sizes for peptides: 0.3, 0.5 and 1 mL insulin syringes explained
Barrel sizes, scale divisions, gauge numbers and dead space as device facts, with the ISO standards behind them and what the tolerance allows.
Syringe vs pen for peptides: which one, and when?
Insulin syringe or reusable injection pen for reconstituted peptides? How they compare on dosing accuracy, cost, waste and hassle — and which fits your situation.
Peptide pens compared: a plain overview of reusable injection pens
Reusable injection pens for peptides, compared without the fluff: manual vs automatic, clicks vs silent, half-unit precision, cartridge and adapter compatibility, and smart dose tracking.
Automatic vs manual injection pens: which delivery suits you?
Automatic (spring-loaded) or manual injection pen? How the two delivery styles differ in feel, control, speed and reliability — and who each one actually suits.
Injection safety basics: sterile habits, rotation and warning signs
The safety layer around subcutaneous injection: what sterile handling means, why rotation exists as a concept, how sharps waste is regulated, and which signs belong to a clinician.
Preparing and using a peptide nasal spray: Semax, Selank and Adamax
An illustrated guide to peptide nasal sprays: equipment, volume calculations, dissolving, filling, labelling, pump priming, spray technique and storage.
Basics & status
What peptides are, their legal status and where the sport rules stand.
What are peptides? A plain-English explainer
Peptides are short chains of amino acids that work like biological messages. What they are, how they differ from proteins, the main types people search for, and why dosing and half-life matter.
List of peptides and their approval status (by category)
A categorised list of peptide names with the regulatory status of each: approved medicine, investigational, unapproved research chemical or supplement.
Are peptides legal? An honest, layered answer
Are peptides legal? It depends on the peptide, the country, and how it is sold and used. A plain look at approved drugs, the research-chemical gray zone, and bans.
What peptides are FDA approved? The real list
What peptides are FDA approved? A plain list of approved peptide drugs by brand and use, what approval actually means, and which popular ones are not approved at all.
Are peptides banned in sport? WADA, NCAA and the prohibited list
What the WADA Prohibited List and the NCAA banned classes say about peptides: section S0, the S2 class, the named examples, and where they differ.
Peptides for Dogs and BPC-157: Can You Use Peptides on Animals?
Peptides for dogs, cats and horses: which peptide medicines are approved for animals, what BPC-157 and TB-500 data exist, and where circulating dog doses come from.
How to pronounce retatrutide, tirzepatide, semaglutide and other peptide names
Syllables, stress, IPA and plain-English respellings for peptide INN names, the WHO stems behind them, and why speakers disagree about the accent.
Are SARMs peptides? SARMs vs peptides, molecule by molecule
SARMs are not peptides. How the two differ in chemistry, in the receptor they act on, in legal status in the US and EU, on the WADA list and in the evidence.
Are peptides steroids? How the two drug classes differ
Peptides are chains of amino acids; steroids are built on a four-ring carbon frame. How the two classes differ in structure, US law and the WADA list.
Peptides vs GLP-1: are GLP-1 medicines peptides?
GLP-1 medicines such as semaglutide and tirzepatide are peptides. What separates these approved prescription drugs from unapproved research peptides.
GIP/GLP-1 dual agonists: one peptide, two hormone receptors
What a GIP/GLP-1 dual agonist is, what the gut hormone GIP does, how the class differs from GLP-1 and triple agonists, and where each substance stands.
This article is for informational purposes only and does not replace medical advice. myPeptides gives no dosing recommendations.