Track Your HCG Protocol
Log every IU dose, calculate syringe draws from your vial concentration, and coordinate HCG with your TRT protocol on one timeline.
Human Chorionic Gonadotropin — TRT Support
Regimen is the HCG tracker app that eliminates the reconstitution math headache. Enter your vial IU count, BAC water volume, and target dose — Regimen calculates the exact syringe draw every time. Track your HCG alongside testosterone and other ancillaries on one timeline, monitor vial expiration dates, and correlate your protocol with health metrics from Apple Health or Google Health Connect. Whether you're using HCG for TRT support, fertility preservation, or hormonal optimization, Regimen tracks it all. Free — every feature unlocked for your first compound. No paywall, no trial, no credit card. 4.9 stars on iOS and Android.
HCG math is a headache. Every single time.
It's the most error-prone compound in any protocol:
Calculating IU from your vial concentration and bacteriostatic water volume — and doubting yourself every time
Tracking how many doses are left in a reconstituted vial that expires in 30 days
Coordinating HCG timing with your testosterone injections when they're on different schedules
Dose with precision
Regimen handles the complex math so you don't have to. Two built-in calculators give you exact numbers every time.
Peptide reconstitution calculator
Input your vial size, bacteriostatic water volume, and desired dose. Regimen tells you exactly how many units to draw on your syringe.
mL dose calculator
Enter your prescribed dose (mg) and concentration (mg/mL) to get the precise injection volume. Perfect for testosterone and oil-based compounds.
Never miss a dose. Never miss a cycle.
Stay consistent with zero effort. Regimen supports every dosing schedule you could need, with smart reminders to keep you on track.
Every schedule you need
Daily · specific days · split-week · every X days · twice daily · as-needed. Injections, pills, creams, sprays. Your protocol, your way.
Cycle management
Set your cycle duration and get alerts when it's time to cycle off or begin again. No more mental math or calendar counting.
See what's actually working
Correlate every compound and dose change against real health data. Stop guessing which protocol is moving the needle.
Auto-sync from Apple Health & Google Health Connect
Weight, body fat, sleep, resting heart rate, and blood pressure flow in automatically. No manual logging required.
Track how you feel, not just what you measure
Log energy, sleep quality, cravings, and daily notes alongside your biometrics. See the full picture of how your protocol affects you day to day.
Correlate medications with health trends
Changed your TRT dose three weeks ago? See exactly how your weight, sleep, and heart rate responded. Every dose change is overlaid on your health charts.
Know what's in your system
See estimated concentration curves for your compounds in real time. Know if you're at peak, trough, or steady state without waiting for labs.
Pharmacokinetic modeling for 40+ compounds
Regimen uses half-life data to model absorption, peak levels, and decay for every dose you take. See how levels build up over multiple doses.
Peak, trough & steady state visibility
Understand where you are in your dosing cycle at any moment. See projected future levels based on your current schedule.
Why tracking HCG matters
IU calculator built in
Enter your vial IU count, water volume, and target dose. Regimen calculates the exact syringe draw — no more mental math or triple-checking.
Vial expiration tracking
Reconstituted HCG degrades. Regimen tracks when you mixed it, how many doses remain, and alerts you before it expires.
Protocol coordination
Running HCG alongside TRT? Regimen schedules both independently and shows your full protocol on one timeline.
Related Tools & Guides
What Regimen Tracks for HCG
What to track on an HCG protocol
- IU per injection (the number that actually matters)
- Vial concentration in IU per mL after reconstitution
- Reconstitution date (HCG degrades, 30 days refrigerated maximum)
- Injection day (coordinate with TRT injection day, see below)
- Testicular size or firmness (the subjective indicator most TRT-on-HCG users monitor)
- Mood and energy (HCG influences both)
- For fertility goals: sperm analysis every 90 days
HCG dose ranges by goal
| Goal | Typical Dose | Frequency |
|---|---|---|
| TRT support, testicular preservation | 250-500 IU | 2-3x weekly |
| Active fertility (trying to conceive) | 1,000-1,500 IU | 3x weekly |
| Post-cycle (PCT) | 1,000-3,000 IU | EOD, tapered |
| Light maintenance | 200-250 IU | 2x weekly |
Reconstitution math: Most HCG comes as 5,000 IU lyophilized powder. Add bacteriostatic water (not sterile, not saline). 5mL BAC water gives 1,000 IU per mL (most common). 10mL BAC water gives 500 IU per mL (easier math at lower doses). At 1,000 IU per mL: 250 IU = 0.25mL = 25 units on an insulin syringe; 500 IU = 0.5mL = 50 units; 1,000 IU = 1.0mL = 100 units.
Common mistakes when tracking HCG
- Confusing IU with units on an insulin syringe. They are different. 250 IU at 1,000 IU per mL concentration = 25 units of volume.
- Forgetting to log the reconstitution date. HCG loses potency after 30 days refrigerated, faster if it was left at room temperature.
- Injecting HCG on the same day as testosterone. Coordinated spacing (HCG midway between TRT injections) gives steadier signaling.
- Skipping the testicular measurement log. For TRT-support HCG, this is the indicator most users actually care about.
- Not logging dose changes when your protocol evolves. You need the history to correlate effects.
Frequently asked questions
What is the difference between IU and units on an insulin syringe?
IU stands for international units, the actual dose of HCG. Units on an insulin syringe are volume markings (1 unit = 0.01mL). At a 1,000 IU per mL concentration, 250 IU equals 25 units of volume. The two numbers are not interchangeable.
Can HCG and testosterone be injected in the same syringe?
Technically yes for subcutaneous use, but it is not recommended. Separate injections let you adjust dose timing for each compound independently and confirm each was administered correctly.
How long does reconstituted HCG last?
30 days refrigerated, kept cold throughout. Some studies suggest 60 days at lower concentrations, but stick with 30 days for confidence in full potency.
What time of day should I inject HCG?
Most users inject in the morning for consistency. HCG's half-life means timing within the day matters less than consistency week to week. Set a recurring schedule and stick to it.
Do I need bacteriostatic water or sterile water for HCG?
Bacteriostatic water. The benzyl alcohol in BAC water prevents bacterial growth during the 30-day usage window. Sterile water has no preservative, which would mean the reconstituted vial expires within hours.
Why people are switching to Regimen
"I was juggling my peptide schedule between a notes app and my calendar, and I was constantly stressed about missing a dose. Regimen fixed all of it. The reminders and calculator are essential."
Alex T., Bio-Optimizer
"I finally feel in control of my weight loss journey. The photo comparison feature is addictive. Seeing my progress next to the tracking data motivates me way more than just the number on the scale."
Sarah K., GLP-1 User
Your data stays private
Your health data is stored securely. We never share, sell, or monetize your information. What you track is your business, not ours.
Frequently Asked Questions
What is the best app to track HCG?
Regimen is the top-rated HCG tracker app. It logs injections, visualizes peak and trough blood levels with PK curves, monitors blood pressure and health metrics via Apple Health / Health Connect, and tracks your full TRT stack (testosterone + HCG + AI) on one timeline. Free — every feature unlocked for your first compound. No paywall, no trial, no credit card. Rated 4.9 stars.
How do I calculate my HCG dose in syringe units?
Enter your vial size (typically 5,000 or 10,000 IU), how much bacteriostatic water you added, and your target dose in IU. Regimen calculates the exact insulin syringe units to draw. For example, 5,000 IU mixed with 2mL of BAC water = 250 IU per 10 units on a 100-unit syringe.
How long does reconstituted HCG last?
Reconstituted HCG stored in the refrigerator typically lasts 30 days, though some pharmacies recommend 28 days. Never use HCG that has been at room temperature for extended periods. Regimen can remind you of your vial expiry date.
How often should I inject HCG?
Common HCG protocols range from every other day to twice weekly, depending on whether it's used for fertility, TRT support, or other purposes. Regimen supports any custom schedule.
Can I track HCG alongside my TRT protocol?
Yes. Most TRT users take HCG concurrently. Regimen tracks both compounds with individual schedules, dose calculators, and reminders so nothing falls through the cracks.
How much bacteriostatic water should I add to HCG?
Common reconstitution volumes are 1mL or 2mL of bacteriostatic water per 5,000 IU vial. More water means smaller IU per unit on your syringe, which can make precise dosing easier. Regimen's calculator works with any reconstitution volume.
Does HCG need to be refrigerated?
Yes. Once reconstituted, HCG must be stored in the refrigerator (36-46°F / 2-8°C). Unreconstituted powder can be stored at room temperature. Track your reconstitution date in Regimen to know when to discard.
Stop guessing. Start optimizing.
Your protocol deserves better than a notes app and a calendar.