Reviewed by the PeptideMind Team · Updated July 15, 2026

HCG Dosage Guide, Benefits & Side Effects

HCG mimics LH to stimulate natural testosterone production and preserve fertility during TRT, with strong clinical response rates. See dosing.

As seen on

HCG Dosage Guide for Sexual HealthHCG Dosage Calculator

HCG is a hormone that tells the testicles to keep producing testosterone and stay their normal size. It's commonly used after steroid cycles or alongside testosterone therapy to protect fertility and prevent the testicles from shrinking.

Vial size

5,000 IU

Bacteriostatic water

5 mL

Dosing

250–500 IU

Frequency

2×/week

Cycle

Ongoing or 4–6 weeks

Benefit

Sexual Health

Explore calculators

Basic Dosage Calculator

Calculate peptide doses with our visual syringe guide.

Peptide per vial

Target research quantity

Bac water added

What is HCG?

HCG (Human Chorionic Gonadotropin) is a hormone that acts like a stand-in for a key reproductive signal (LH), telling the body to keep producing testosterone and support fertility. It's an FDA-approved treatment used for certain fertility issues in both men and women, including undescended testicles in boys and ovulation support in women. It's also widely used by men on testosterone therapy to help preserve natural testicular function and fertility.

Sexual

Research targets include libido, reproductive hormone signaling, and sexual function.

Hormonal

Research targets include endocrine signaling and hormone receptor pathways.

Hormonal

hcg

Hormonal

Is HCG FDA approved?

HCG is FDA approved.

FDA Approved

HCG has been reviewed and approved by the FDA for safety and efficacy in its approved indications.

Regulated Manufacturing

Manufactured under FDA-regulated quality standards, ensuring consistent purity and dosing.

Prescription Use

Legally available by prescription for its approved medical indications.

A smartphone screen displaying an app interface labeled "FDA Status," confirming a drug's approval status with a green "Yes" indicator. Below, there is an "Approved Use" section highlighting FDA approval, accompanied by usage instructions and additional information about the importance of regulatory approval for drug safety and effectiveness.

Our top-rated vendor

View all

Our rankings are based solely on third-party lab testing rigor, COA transparency, and pricing — no paid placements, no affiliate influence. We update this list as new data comes in.

Based on current scores, this vendor ranks highest across those criteria.

Protide Health

#1 Rated Research Peptide Supplier

How Does HCG Work?

It attaches to the same receptor that a reproductive hormone (LH) normally uses in the testes, switching on an internal signal that tells cells there to produce testosterone. This helps maintain natural testosterone production and support fertility.

Mimics LH

Attaches to the same receptor a reproductive hormone (LH) normally uses.

Signals the testes

Switches on an internal signal in testicular cells.

Maintains testosterone

Helps sustain natural testosterone production and fertility.

How to reconstitute HCG

View guide

The materials you'll need and step-by-step instructions for safely mixing HCG with bacteriostatic water.

Materials needed

Your HCG vial (lyophilized)

Alcohol swabs

Bacteriostatic sterile water

3 mL syringes (Luer Lock tip)

25G or 27G needles (Luer Lock). Other gauges may also be acceptable.

Sharps container (optional)

Remove the caps

Remove the caps from both your HCG vial and your bacteriostatic water vial.

Sanitize the rubber stoppers

Wipe down the rubber stoppers on both vials with alcohol swabs and let them dry for about 3 minutes.

Attach the needle

Take your 3 mL syringe and needle. Twist the needle's plastic hub into the Luer Lock tip on the syringe to secure it.

Draw the bac water

Pull back on the plunger to draw your desired volume of bacteriostatic water. If you overfill, just push the excess back in until you reach the right marker on the syringe.

How much bac water? HCG typically comes in a 5,000 IU vial. We recommend 5 mL of bacteriostatic water, though anywhere between 1 mL and 3 mL is acceptable. For larger vials you can use up to 5 mL — more bac water makes microdosing easier, but insulin needles usually max out at 1 mL per injection. That means a lot of bac water might force you into multiple injections to hit your target dose. Unless you're microdosing, 2 mL per vial is a solid rule of thumb.

Insert the needle into the HCG vial

With the bac water in your syringe, insert the needle into the HCG vial at a slight angle to avoid pressure buildup.

Use a thin needle: Stick to 25G or higher to avoid damaging the rubber stopper. Higher gauge means a thinner needle.

Release the water gently

Let the water run gently down the side of the vial. Don't inject it forcefully.

Heads up: Sometimes the plunger pushes itself in as soon as the needle enters the vial. Hold the plunger back so you have full control over how fast the bac water enters.

Swirl to dissolve

Avoid shaking. Gently swirl, flip, and roll the vial to dissolve the powder.

Be patient: This usually takes 2 to 5 minutes of consistent swirling, mixing in a circular motion, and gently flipping the vial up and down. The water needs to run through the powder many times to fully dissolve it. Don't shake or get aggressive with it.

Check for full dissolution

The solution should be clear with no visible particles. If it's cloudy or clumpy, wait a minute and repeat the swirling step.

Cap, dispose, and store

Once you're done, cap the needle and dispose of it (ideally in a sharps container). Store the reconstituted HCG vial in the fridge whenever it's not in use. It will stay good for approximately 30 days.

How to Store HCG

Keep the dry powder well below freezing for long-term storage, or it can sit at room temperature for a few weeks. Once mixed with liquid, refrigerate and use within about two months.

Lyophilized Storage

Store below -18°C long-term or at room temperature for up to 3 weeks.

Reconstituted Storage

Refrigerate at 2–8°C and use within 60 days.

A smartphone displaying a "Storage Guide" for peptides, indicating a safe storage temperature range of 2–8°C, with warnings to keep away from light, heat, and freezing. The background is light blue, and additional tips on protecting the peptides are visible below the temperature range.

What Are the Benefits of HCG?

What research says it may help with, and how it works in the body.

male fertility

: Approved by the FDA for a form of low testosterone caused by a signaling problem in the brain (secondary hypogonadism), and is combined with another hormone (FSH) to kickstart sperm production.
: Helps the testicles return to normal function after a cycle of anabolic steroids.
: Keeps testosterone levels inside the testicles normal during testosterone therapy, which prevents the testicles from shrinking and helps preserve fertility.

female fertility

: Approved by the FDA to trigger the final maturing of an egg before ovulation in fertility treatment, with a 15-25% chance of pregnancy per cycle.

pediatric

: Approved by the FDA to treat undescended testicles in boys who haven't reached puberty, when the cause isn't a physical blockage, with about a 25% success rate.

What Are the Side Effects of HCG?

Who should avoid it, warning signs to watch for, and what to know before combining it with other compounds.

Who Should Avoid It

: Hormone-sensitive cancers (prostate, breast)
: Pregnancy (except as prescribed)
: Precocious puberty risk in children

Stop Right Away If You Notice

: Signs of gynecomastia (breast tenderness, swelling, nipple sensitivity)
: Severe or persistent headaches
: Signs of blood clots (leg swelling/pain, shortness of breath, chest pain)
: Allergic reactions (rash, hives, difficulty breathing, facial swelling)
: Severe abdominal pain or bloating in women (possible OHSS)
: Testicular pain or swelling beyond normal
: Significant mood changes (depression, aggression, severe irritability)
: Vision changes

Milder Signs to Watch For

Cloudiness, discoloration, or floating particles indicates degradationCompromised vial seal or expired product

Was it helpful?Yes

How Long Should a HCG Cycle Last?

This breaks down how long a typical HCG cycle runs and what research suggests happens at each stage. Research shows that staying on a peptide continuously, without a break, may make it less effective over time.

That's why most research protocols build in a break between cycles, often called a washout period, to let the body reset before starting again.

Day 1-3: Cellular-level action begins; no immediate noticeable effects
Week 1-2: Testosterone increase detectable on labs; possible mood/energy improvement
Week 2-4: Testicular fullness/size improvement noticeable; improved well-being
Week 4-8: Stable testosterone levels; fertility parameters beginning to improve
Month 2-3: Sperm count improvements if used for fertility; sustained testicular function
Week 0-0: Maintained testicular size and function with ongoing use

Cheat Sheets Featuring HCG

See how HCG fits into a broader research stack with these free downloadable cheat sheets. Each one includes reference dose ranges, dosing frequency, and half-life for every peptide it covers. For research purposes only.

View all

Hormonal Peptide Cheat Sheet

5 peptides

Master Peptide Cheat Sheet

78 peptides

Sexual Peptide Cheat Sheet

6 peptides

HCG Research References

It is a fda approved compound

5Research references

HCG

HCG is a fda approved compound

HCG Monotherapy for Hypogonadism

HCG monotherapy (1500-2000 IU twice weekly) effectively increased testosterone and improved symptoms while maintaining fertility.

2013

Ovulation Induction Success Rates

HCG trigger achieves pregnancy rates of 15-25% per cycle in clomiphene/letrozole protocols.

2017

HCG for Intratesticular Testosterone Maintenance

250 IU HCG every other day during TRT maintains intratesticular testosterone at baseline, preventing atrophy and preserving fertility.

2005

Cryptorchidism Treatment Meta-Analysis (Cochrane)

Meta-analysis of 1,231 boys showing ~25% success rate for hormonal treatment of cryptorchidism.

2014

Spermatogenesis Induction with HCG/FSH

Combined HCG and FSH therapy induces spermatogenesis in 70-90% of men with hypogonadotropic hypogonadism.

2018

Frequently Asked Questions About HCG

Straight answers on reconstitution, dosing, and safety, everything you need to research with confidence. For research reference only.

Human Chorionic Gonadotropin (HCG) is a naturally occurring glycoprotein hormone that closely mimics luteinizing hormone (LH). It binds to the LH receptor (LHCGR) on Leydig cells in the testes (or the corpus luteum/ovaries in females), triggering a cAMP-driven signaling cascade that stimulates StAR protein activity and downstream steroidogenic enzymes, ultimately increasing testosterone production. Because it acts directly on the gonads, it can stimulate testosterone and sperm-supporting activity even when the pituitary's own LH signal is suppressed, such as during exogenous testosterone use.

In clinical settings, HCG is used to treat hypogonadotropic hypogonadism and male infertility, and as a 'trigger shot' in female fertility treatment (IVF/ovulation induction). Outside formal prescriptions, it is widely discussed in TRT (testosterone replacement therapy) and anabolic steroid communities as an add-on to maintain testicular size and function, and in post-cycle therapy (PCT) protocols to help restart natural testosterone and sperm production after a cycle.

Reported protocols vary widely. Commonly cited ranges for maintaining testicular size on TRT are around 250–500 IU two to three times per week, or roughly 500–1,500 IU weekly split across multiple injections. Higher doses (1,500–2,000 IU, 2-3x/week) are described in some hypogonadism protocols, while fertility-focused doses used in IVF trigger shots (around 10,000 IU) are much higher and used differently. These figures come from clinical literature and community reporting, not a single universal standard — actual protocols vary by provider and goal, and are not a substitute for individualized medical guidance.

Commonly reported mild effects include injection site irritation, headache, acne, mood changes (irritability, restlessness), water retention, and gynecomastia-related concerns (since HCG can increase estrogen via increased testosterone aromatization). More serious but rarer effects, mainly documented in higher-dose fertility contexts, include ovarian hyperstimulation syndrome in women and, uncommonly, allergic reactions. These are drawn from clinical prescribing information and self-reported forum accounts; individual reactions vary and are not predictable from these summaries.

HCG is usually supplied as a lyophilized (freeze-dried) powder in vials (common sizes include 3,500, 5,000, 10,000, or 11,000 IU) that must be reconstituted with bacteriostatic or sterile water before injection. The unreconstituted powder is generally kept refrigerated or frozen depending on the product, while reconstituted solution is typically stored in the refrigerator and used within days to a few weeks, as potency can decline over time. Exact stability windows depend on the specific product and manufacturer guidance.

HCG is an FDA-approved prescription medication in the United States for specific indications (e.g., hypogonadism, fertility treatment) and requires a prescription for legitimate medical use. Products marketed online as 'research chemicals' or sold without a prescription exist in a legal gray area and are not approved for human use in that context — quality, purity, and dosing accuracy from unregulated sources cannot be verified. Regulatory status varies by country.

HCG acts directly on the LH receptor in the testes, bypassing the pituitary and hypothalamus entirely, which makes it effective even when the HPG axis is suppressed. Gonadorelin, by contrast, is a GnRH analog that stimulates the pituitary to release its own LH and FSH, meaning it depends on a still-responsive pituitary/hypothalamus. This distinction is frequently discussed in TRT communities when comparing which compound better preserves the natural signaling axis versus which more reliably drives testicular activity in suppressed states.

HCG Dosage Guide, Benefits & Side Effects

HCG Dosage Guide for Sexual HealthHCG Dosage Calculator

What is HCG?