Peptide tracking, GLP-1, and evidence guides
Practical record-keeping, fact-checked app comparisons, calculator workflows, and evidence reviews. Unknowns and estimates are labeled explicitly.
Compare the best peptide tracker apps, learn how to track peptide injections, or use the free calculators and tracking tools.
Tracking Guides
Peptide Tracker App Features: A Practical Evaluation List
Evaluate peptide tracker app features across logging, schedules, calculators, estimated curves, privacy, export, platform support, and evidence quality.
Tracking GuidesStop Using a Phone Spreadsheet for Health Tracking
Still using clunky phone spreadsheets to track your routine? Upgrade to Halflife — Peptide & GLP-1 Log for an automatic, beautiful dashboard that never breaks.
Tracking GuidesPeptide Calculator App: Calculator vs Full Tracker
Compare a peptide calculator app with a full tracker for calculation history, dose logs, schedules, vial inventory, sites, and estimated level models.
Tracking GuidesBiohacking Routine Tracker App: The Data Layer Your Wearable
You track your sleep, steps, and heart rate—but how are you tracking your shots? See why Halflife Labs is the essential tracker app for serious health
Tracking GuidesPeptide Calendar App: Your Body Isn't a Calendar
Most tracking apps treat your health routine like a dentist appointment. Discover why Halflife Labs is the only app built for how your body actually works.
Comparisons
Cagrilintide vs Semaglutide: Amylin vs GLP-1 & CagriSema
Cagrilintide (amylin analogue, ~7-day half-life) vs semaglutide (GLP-1, ~7-day half-life): mechanism, weight loss, and why they combine as CagriSema.
ComparisonsBPC-157 vs TB-500: Half-Life, Mechanism & Evidence Compared
BPC-157 (~15-min half-life) acts locally via angiogenesis; TB-500 acts systemically via cell migration. Compare mechanism, PK, evidence, and legal status.
ComparisonsCJC-1295 vs Ipamorelin: Evidence Comparison
Compare CJC-1295 forms and ipamorelin by mechanism, evidence quality, half-life claims, and limitations.
ComparisonsRetatrutide vs Tirzepatide: Half-Life, Weight Loss & Mechanism
Retatrutide (triple GLP-1/GIP/glucagon agonist, ~6-day half-life) vs tirzepatide (dual GIP/GLP-1, ~5-day half-life): weight loss, mechanism, and approval.
ComparisonsSemaglutide vs Tirzepatide Half-Life
Semaglutide has an approximately 7-day half-life; tirzepatide is approximately 5 days. Compare clearance, steady state, and weekly curves.
ComparisonsCJC-1295 DAC vs No DAC: Evidence Comparison
Compare CJC-1295 with DAC and no DAC: albumin binding, half-life evidence, human research, terminology, and regulatory status.
ComparisonsRegimen Alternative: Halflife vs Regimen, Verified
Compare Halflife and Regimen using current official sources for platforms, estimated curves, calculators, health data, pricing, and known limitations.
ComparisonsShotsy Alternative: Halflife vs Shotsy, Verified
Compare Halflife and Shotsy using official sources for GLP-1 focus, broader compound tracking, platforms, injection records, side effects, and estimates.
ComparisonsPepTracker Alternative: Halflife vs PepTracker, Verified
Compare Halflife and PepTracker using official sources for protocol building, calculators, reminders, progress, estimated curves, pricing, and unknowns.
ComparisonsSmart Peptide Tracker Review: Halflife Comparison
Compare Halflife and Smart Peptide Tracker using current marketplace facts for Android availability, compound breadth, pricing model, tools, and limitations.
ComparisonsPepCalc Alternative: Calculator vs Full Tracker
Compare a PepCalc-style peptide calculator workflow with Halflife's full protocol tracker, including calculations, logs, reminders, inventory, and unknowns.
ComparisonsPep AI Alternative: Structured Tracking vs AI
Compare Pep AI's publicly promoted AI-assisted peptide workflow with Halflife's structured iPhone protocol tracking, calculations, privacy, and unknowns.
GLP-1 Guides
Peptide Evidence
BPC-157 Half-Life: What Evidence Shows
BPC-157 human half-life is unknown. The best formal PK study found a parent-peptide half-life under 30 minutes in rats and beagle dogs.
Peptide EvidenceHow to Calculate Peptide Steady State: Blood Concentration
Learn how to calculate peptide steady state, map blood estimated concentration curves, and use Halflife to automate your pharmacokinetic tracking
Peptide EvidenceHow to Track Peptide Injections Without Losing Context
Learn how to track peptide injections with consistent units, timestamps, sites, vial records, schedules, symptoms, and clearly labeled estimates.
Peptide EvidenceWeekly Trough Models: What They Can and Cannot Show
Learn what a modeled pre-dose trough can illustrate and why it cannot diagnose symptoms or determine treatment changes.
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