TRT, peptide, GLP-1 & supplement
medication guide.

How to read a dosing line

Every row in the index above carries a half-life and a “typical reported dose”. Both are descriptive: they summarise what is commonly reported for a compound in the literature and in clinical practice, and neither is a recommendation for you. A dose is set by a licensed prescriber against your bloodwork, your history and your goal. What the library is good for is knowing what a compound is, roughly what scale of dose is normal, and how often it usually needs giving.

Three things determine whether a number on this page transfers to your situation at all:

• Route. The same compound can be injected, taken orally, applied topically or dosed nasally, and the dose is rarely the same across them. Of the 217 entries here, 136 list an oral route, 92 injectable, 12 nasal and 11 topical – several list more than one. The route in brackets is the one the dose belongs to.
• Half-life. It sets the injection interval, not the dose. A compound with a 2-hour half-life dosed weekly is not a mild protocol, it is an absent one.
• Whether it is a salt, an ester or a blend. Testosterone cypionate and testosterone propionate are the same hormone on different release schedules, and their doses and frequencies are not interchangeable.

Why half-life drives injection frequency

Half-life is the time for blood levels to fall by half. It is the single most useful number in the index because it answers the question people usually ask second: how often. The spread across this library is nearly four orders of magnitude.

Half-lives as listed in the library above. The practical consequence of a long half-life cuts both ways: fewer injections, but slower feedback and a much longer wait for a change to settle. The half-life calculator plots the curve for a given compound and interval, and the unit converter interprets the bloodwork you use to check it.

Which compounds need reconstituting

92 of the 217 entries carry reconstitution guidance, which is the tell that they ship as a lyophilised powder rather than a ready-made solution. That group is almost entirely the peptides: they arrive as a dry cake in a vial, you add bacteriostatic water, and the concentration you end up with is whatever you chose when you added it. This is the step that produces most dosing errors, because the same 5 mg vial can be 1 mg/mL or 5 mg/mL depending on how much water went in, and the syringe volume changes accordingly.

• Peptide reconstitution calculator – how much water to add, and what to draw for a given dose.
• Storage and shelf life – how long the vial is good for once it is wet.
• Vial longevity calculator – how many doses a vial holds, and whether you will finish it in time.

The nine classes in this library

The index is grouped the same way the app is. Class is a rough functional grouping rather than a pharmacological taxonomy – several compounds could sit in two of them.

Anabolic steroids are documented separately, since the questions people ask about them are different: see the anabolic compound guides for trenbolone, primobolan, masteron, equipoise and the rest, and the cycle tracking guide for how to log one.

What this library is not

It is an educational reference built from published pharmacology and commonly reported protocols. It is not a prescription, not a supplier, and not a claim that any of these compounds is safe or appropriate for you. A large share of the entries here are not approved for the use people put them to, and several are research chemicals with no human dosing standard at all – the cards say so rather than omitting them, because “this is not established” is itself the useful information.

Where a compound is prescription-only, the right sequence is a conversation with a prescriber and bloodwork, not a dose from a table. Where one is not, the honest position is that the evidence base is usually thinner than the marketing around it. OptiPin exists to track what you and your prescriber decide on, not to decide it.

Frequently asked questions

How many compounds does OptiPin cover?

217, across nine classes: 58 vitamins and supplements, 41 growth and recovery peptides, 40 cardiovascular and metabolic, 20 TRT and testosterone, 15 longevity, 13 cognitive, 13 GLP-1, 9 fat loss and 8 specialty. Every one carries a half-life, typical reported dosing, common uses, side effects and warnings, and 92 of them carry reconstitution guidance. The app tracks all of them; this page is the same library in reference form.

Is the typical dose shown here a recommendation?

No. It is a summary of what is commonly reported for that compound, given so you can tell a microgram compound from a milligram one and sanity-check what you have been told. Your dose comes from a licensed prescriber working from your bloodwork. Nothing on this page is medical advice.

What does half-life tell me about dosing frequency?

It sets the interval, not the amount. A short half-life means levels fall quickly between injections, so the compound is usually given daily or more often – ipamorelin at about 2 hours is dosed daily. A long half-life means the opposite: testosterone undecanoate at 20 to 34 days is given every 10 to 14 weeks. The practical trade is that long-acting compounds need fewer injections but take months to correct if the dose is wrong.

Which compounds need to be reconstituted?

Mostly the peptides – 92 of the 217 entries here. They ship as a freeze-dried powder and you add bacteriostatic water before use, which means you choose the final concentration. Get that step wrong and every dose afterwards is wrong by the same factor, so it is worth running through the reconstitution calculator rather than doing it in your head.

Do I need the app to use this reference?

No. The full index on this page is free, needs no account, and the calculators linked from it are too. The app adds the part a table cannot do: logging what you actually took, projecting blood levels from your own bloodwork, and warning you before a vial runs out.

Are these compounds legal or approved?

It varies by compound and by country. Most cards carry a status line saying which; where one is absent, assume nothing and check the label in your own country. Several entries are approved medicines used off-label, several are prescription-only in some countries and not others, and several are research chemicals with no approved human use anywhere. Approval status is not the same as safety, and neither is the same as whether something is appropriate for you.

How often is the library updated?

It is regenerated from the same data file the app ships, so the page and the app never disagree. New compounds and corrections land here when they land in the app.

Where do the half-lives and dosing ranges come from?

Published pharmacokinetic data where it exists, and commonly reported clinical or community protocols where it does not – which is the case for a fair number of the research peptides. Where a figure is an estimate rather than a measured value, the individual card says so. Treat a half-life with a wide range as exactly that: a range.