In-depth writing on peptide science, GLP-1 pharmacology, and protocol design.
The Halflife blog covers compound mechanisms, half-life pharmacokinetics, real-world protocol considerations, and the science behind the tools we build. Articles are written by the Halflife Labs team and grounded in published research.
The Best SteroidPlotter Alternative in 2026: Why Researchers Are Switching to a Real Pharmacokinetic Engine
SteroidPlotter renders single-bolus decay curves in a browser tab. Halflife computes steady-state accumulation, peak-to-trough ratios, and Racc multipliers — across 45+ compounds, on mobile, with dynamic trough alerts.
PepCalc Alternative: Why a Reconstitution Calculator Is Only Step One — And What You Need After It
PepCalc solves the BAC water calculation correctly. It stops at the syringe. Halflife Labs begins where every reconstitution calculator ends — modeling decay curves, accumulation, and trough alerts from the moment of injection.
The Best Peptide Tracking App in 2026: Every Major Tool, Honestly Compared
Excel breaks, PepCalc forgets you exist, Pep AI buries your dose under a meal log, and Shotsy stops working the moment you add a second compound. We compared every tool — here's the one that actually delivers peace of mind.
Your Wearable Stack Is Missing a Layer. Here's What It Is.
Gyroscope and Exist give you beautiful charts for your Oura and Whoop data. But your peptide protocol gets a blank text box. Halflife is the compound intelligence layer your optimization stack is missing.
Your TRT Log App Has No Idea About the Other 18 Shots You're Taking This Week
Most TRT apps were built for testosterone and nothing else. The moment you add a recovery peptide, a GH stack, or a GLP-1, you're managing multiple apps and scattered notes. Halflife tracks everything — one timeline, one screen.
The Regimen App Alternative That Tracks Your Active Dose — Not Just Your Habit
Regimen is great for building habits — but it treats your GLP-1 shot like a glass of water. Halflife Labs shows you exactly how much of your dose is still active in your body, every day of the week.
That Exhausted Feeling Before Your Next Shot Has a Name — And a Fix
Feeling great on day 2 but dragging by day 6? The weekly crash is real, predictable, and completely visible once you see your level curve. Here's how to stop guessing and start smoothing your routine.
Your Peptide App Is Treating You Like a Dentist Appointment
Calendar apps fire a reminder and forget you exist for seven days. But your body is still processing that dose all week long. Here's why the best peptide tracking app has to go further than a simple shot reminder.
PepTracker App Alternative: Your Reminder Doesn't Know What's in Your Body
PepTracker tells you when to inject. Halflife shows you what's actually happening inside your body between doses — the level curve, the trough, the blind spot every alarm app misses.
Smart Peptide Tracker Review: Health Tracking Shouldn't Need a Tutorial
Smart Peptide Tracker asks you to manage inventory, interpret stack scores, and navigate complex settings. Everyday users just want to know if their routine is working safely. Here's the difference.
Peptide Calculator App: Why Prep Math Is Only Half the Picture
Basic calculator apps get the math right — then disappear. They don't save your history, track what's happening in your body, or tell you when to dose next. Here's what a complete peptide app should do.
Your Health Tracker Shouldn't Feel Like Homework
That phone spreadsheet you're squinting at every injection day? Wrong taps, broken formulas, and three-minute logging sessions. There's a better way — and it takes five seconds.
Your GLP-1 and Your Peptides Deserve One App — Not Three
Running a weight-loss shot alongside a recovery or energy booster? Basic trackers leave you switching between apps and doing the math yourself. Here's what a real multi-goal tracker looks like.
The Best Pep AI Alternative in 2026: One App, One Job, Zero Noise
Pep AI packs meal logs, water rings, sleep diaries, and AI chat into one interface — burying the one number that matters. Halflife gives you a clean visual dashboard of your active levels, and nothing else.
The Best Shotsy App Alternative in 2026: A GLP-1 Tracker Built for Your Whole Health Picture
Shotsy works well for a single weekly GLP-1 injection. The moment you add a second compound, switch to a custom schedule, or want to see your active levels between doses — it runs out of room. Here's what to use instead.
How to Calculate Peptide Steady State: The Complete Guide to Blood Concentration Curves and Accumulation
Every peptide protocol reaches a ceiling — a steady-state plateau where each new dose exactly replaces what eliminated since the last. This guide walks through Racc, decay curves, and peak-to-trough ratios with three fully worked examples: ipamorelin TID, CJC-1295 DAC weekly, and semaglutide weekly.