- •New to a protocol? Read the relevant pillar first (TRT, GLP-1, or Peptides) for context, then come back here for the technique.
- •Need to inject today? Jump to the TRT Injection Guide or Peptide Beginner's Guide.
- •Need to do reconstitution math? The Peptide Calculator handles every common vial size.
- •Looking up a compound? The Medication Library indexes 200+ compounds with dosing references.
Available Guides
Feature Guide
NewA complete reference for every OptiPin feature, organized the way you'd actually use them. Each section maps to what's in the app today: tracking, calculators, estimated levels, Apple Health integration, OptiInsight, inventory, backup, and privacy.
Best for: deciding whether OptiPin fits your workflow, finding a feature you've heard about, getting oriented after install.
Browse the feature guide →Medication Library
200+ compounds across TRT, GLP-1, growth peptides, fat loss, longevity, cognitive enhancers, and supplements. Each entry has typical dosing, half-life, and route notes, the same reference the OptiPin app draws from.
Best for: looking up a specific compound, comparing options within a class, getting dosing references.
Browse the library →Peptide Beginner's Guide
End-to-end walkthrough for first-time peptide users: vial reconstitution math, BAC water selection, syringe units, injection sites, storage, and the most common mistakes that ruin a vial.
Best for: first peptide cycle, BPC-157, GH peptides, anyone reconstituting from lyophilized powder.
Read the guide →TRT Injection Guide
Step-by-step injection technique for testosterone: intramuscular vs subcutaneous, needle gauge selection, draw and inject sequence, the seven main injection sites, and post-injection care.
Best for: first TRT shot, switching from IM to SubQ, dialing in technique to reduce post-injection soreness.
Read the guide →Peptide Reconstitution Calculator
Free ToolInteractive calculator for every common peptide vial. Enter vial size, BAC water added, and target dose to compute the exact syringe units. Supports 200+ medications with typical dosing hints and one-tap blend expansion for popular stacks (Wolverine, GLOW, KLOW, GH Stack, Healing & Inflammation, Growth + Healing, Anti-Aging).
Best for: every peptide user. The single most-cited error mode in peptide protocols is reconstitution math, this removes it.
Open the calculator →Free Calculators & Tools
Free, no-login web tools. Each calculation can also be tracked and forecast over time in the OptiPin app.
Free Testosterone Calculator
Free ToolVermeulen equation — enter total testosterone, SHBG, and albumin to get free testosterone, bioavailable testosterone, and percent free.
Open the calculator →TRT Dose Calculator
Free ToolTurn a weekly testosterone dose and vial concentration into the exact mL and insulin-syringe units per injection — and how long a vial lasts.
Open the calculator →Half-Life Visualizer
Free ToolPlot single-dose and steady-state blood-level curves for 60+ compounds, with time-to-peak and time-to-steady-state.
Open the visualizer →How Level Forecasting Works
MethodologyThe pharmacokinetic model behind OptiPin's level curves, in plain language — and how a single bloodwork result calibrates the forecast to your own physiology instead of a population average.
Read the methodology →HCG Dose Calculator
Free ToolMix HCG and get the exact insulin-syringe units to draw for your target IU dose, plus concentration and doses per vial.
Open the calculator →Vial Longevity & Cost
Free ToolHow many doses and weeks a vial lasts, plus cost per dose and per week from vial size, concentration, dose, and frequency.
Open the calculator →GLP-1 Titration Schedule
Free ToolThe standard manufacturer titration for Wegovy, Ozempic, and Mounjaro/Zepbound, mapped week-by-week to dates from your start date. Reference only — follow your prescriber.
Open the planner →Low Testosterone Quiz
Free Tool10-question ADAM screening questionnaire — see whether your symptoms match the low-testosterone pattern. Educational, not a diagnosis.
Take the quiz →Choosing an app? Honest comparisons:
Going Deeper
The guides above cover technique. The pillars below cover the broader clinical context: who qualifies, what labs matter, what the evidence actually says, and what to do when the protocol isn't working.
TRT Pillar
Diagnosis, dosing, TRAVERSE, hematocrit, supraphysiologic considerations.
GLP-1 Pillar
Compound choice, titration, side effects, switching, maintenance.
Peptides Pillar
Categories, evidence, regulatory state, building a protocol.
Cross-cut topic hubs spanning all three pillars:
Combatting Side Effects
Hands-on guides for managing the cosmetic side effects that come with TRT, anabolics, and peptides — hair thinning and hormone-driven skin breakouts — without abandoning the protocol that's driving them.
Minimizing Hair Loss on TRT
The full stack — topicals, oral options, and why we steer clear of finasteride — for androgen-driven hair loss.
Microneedling Guide
Needle depth, frequency, and how to pair it with minoxidil for hair regrowth — step by step.
Red Light Therapy
Low-level laser / red light (LLLT) for hair density and skin recovery — what the evidence supports and the device power that actually matters.
Blue Light Therapy
Targeting the hormone-driven acne and skin breakouts that can come with TRT and anabolics.
Track Your Protocol in OptiPin
Log doses, forecast hormone and compound levels, rotate sites, daily symptom check-ins, and lab tracking, all private and on-device.
Download on the App Store