HCG
Testicular function
LH mimetic — the classic option for preserving testicular function.
Also sold as
Research chemical vendors can't legally label products with the real name, so HCG often appears under coded SKUs. If you're shopping and see any of these, it's the same compound:
- HCG
- Chorionic Gonadotropin
Codes shown are for identification only.
Your draw
What it actually is
Human chorionic gonadotropin binds the LH receptor on Leydig cells, directly stimulating testosterone and sperm production. Acts downstream of the pituitary.
Why people use it
- TRT users preserving fertility and testicular volume
- Restoring function after long suppression
- Stronger and more direct than gonadorelin, at the cost of being less physiological
Educational only · Not a vendor claim
How it works
Binds the LH receptor on Leydig cells, directly stimulating testosterone and sperm production.
Health benefits
- Maintains testicular function
- Boosts endogenous testosterone
- Supports fertility on TRT
What you'll feel
- Restored testicular size in weeks
- Improved libido
- Mood stability for some
Pros
- Decades of clinical use
- Strong, reliable stimulation
- Effective for HPTA restart
Cons
- Can downregulate receptors at high doses
- Aromatization risk
- May raise estrogen
Side effects to know
- Estrogen elevation
- Acne
- Mood swings at high doses
Best suited for
Educational summary · Not medical advice · Discuss with a qualified clinician
Typical timeline
General pattern for the Sexual Health category. Individual response varies.
- Acute (PT-141, Oxytocin)Effect within 30–90 minutes. Facial flushing and slight nausea are common early on.
- Weeks 1–4 (Gonadorelin, HCG)Testicular volume returns on TRT. Fertility markers respond over 8–12 weeks.
Pairs well with
Common combinations experienced users run alongside HCG. Always add one peptide at a time so you can attribute effects and side effects.
Read the safety guide before stacking.
The reconstitution math
- 1Reconstitute the 5 mg vial with 5 mL of bacteriostatic water. Tilt — don't shake.
- 2Concentration becomes 1,000 mcg/mL (1 mg/mL).
- 3For a 500 mcg dose, draw 0.500 mL — that's 10 units on a 1 mL insulin syringe.
- 4One vial gives you approximately 10 doses.
Reminder: 100 units on an insulin syringe = 1 mL. Always start at half the listed dose for the first week and rotate injection sites between arms, legs, abdomen, and glutes.
Dose logging is available for signed-in users. Track today's dose and notes for HCG.
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Mixing ratios, units to draw and storage basics — one page, no strings.
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Keep going from here
Everything on the site that connects to HCG: comparable compounds, the exact math for this vial, and the tools to run the cycle.
Compare with these
Tools for this protocol
Prefilled with 5 mg, 5 mL BAC water, and a 500 mcg dose.
Printable units-to-micrograms lookup for every common vial and water volume.
Add HCG to a protocol with schedule, dosing, and a shopping list.
Log each dose so you can tie effects and side effects to real dates.
Put HCG next to two other peptides on dosing and goals.