Side-by-side · Research reference
HCGvsProstamax
Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.
AFDA-ApprovedHUMAN-REVIEWED12/52 cited
BAnimal-MechanisticHUMAN-REVIEWED11/38 cited
HCG
Glycoprotein Hormone · LH Mimetic
IM or SQ · 2–3×/week
Prostamax
Khavinson Bioregulator · Tissue-Specific Peptide
4 AAPeptide length
SQ · Protocol per Khavinson tradition
01Mechanism of Action
Parameter
HCG
Prostamax
Primary target
LH receptors on testicular Leydig cellsSchröder-Lange 2025
Chromatin in prostatic cells — pericentromeric heterochromatin regions
Pathway
hCG → Leydig cell LH receptor → Intracellular cAMP → Steroidogenesis pathway activation → Testosterone synthesis
Epigenetic modulation → heterochromatin decondensation → transcriptional derepressionDzhokhadze 2012
Downstream effect
Elevated intratesticular testosterone, restored spermatogenesis, virilization, secondary sex characteristic developmentKonsam 2026Zachariou 2026
Increased sister chromatid exchange, Ag-NOR activation, reduced C-heterochromatin condensation; tissue-specific regenerative stimulation in prostate organotypic culturesDzhokhadze 2012Zakutskiĭ 2006
Feedback intact?
No — exogenous hCG bypasses hypothalamic-pituitary axis; endogenous LH remains suppressed
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Origin
Heterodimeric glycoprotein (alpha subunit shared with LH/FSH/TSH; beta subunit confers specificity). Available as urinary-derived or recombinant formulations.
Synthetic tetrapeptide modeled on naturally occurring protein-derived bioregulators isolated between lysine-arginine motifs in long-lived speciesKhavinson 2017
Antibody development
Rare with recombinant; possible with urinary-derived formulations
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02Dosage Protocols
Parameter
HCG
Prostamax
Hypogonadotropic hypogonadism (monotherapy)
2,000 IU IM/SQ 2–3×/weekKonsam 2026Zachariou 2026
Titrate to normalize testosterone (300–1,000 ng/dL) or achieve target AMH ~7.4 ng/mL.
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Combined therapy (hCG + FSH)
hCG 2,000 IU 2×/wk + rFSH 75 IU 3×/wkKonsam 2026Nariyoshi 2025
Preferred for azoospermia; FSH added after initial hCG phase or from outset.
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Triple therapy (experimental)
hCG 2,000 IU 2×/wk + rFSH 75 IU 3×/wk + testosterone 100 mg IM q2wkKonsam 2026
May accelerate virilization; reduces hCG requirements (~30% lower cumulative dose vs monotherapy).
—
Cryptorchidism (pediatric)
500–4,000 IU IM 2–3×/week for 3–6 weeks
—
Evidence basis
RCT / Meta-analysis / FDA-approvedKonsam 2026Huijben 2026
Animal / organotypic cultureZakutskiĭ 2006Dzhokhadze 2012
No randomized controlled trials in humans.
Duration to sperm appearance
12–24 months (median ~18 mo)Huijben 2026Zachariou 2026
Congenital HH may require longer treatment; acquired HH responds faster.
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Monitoring
Serum testosterone, semen analysis q3–6mo, testicular ultrasound
Thickened seminiferous tubules (>300 μm) on ultrasound predict imminent sperm appearance.Nariyoshi 2025
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Effective concentration (in vitro)
—
0.05 ng/mLZakutskiĭ 2006
Organotypic culture model; demonstrated tissue-specific stimulation.
Human clinical dose
—
Not established
No published human trials; dosing extrapolated from Russian clinical tradition (not peer-reviewed).
Age groups studied
—
Young (3-week) and aged (18-month) rats; elderly humans (75–86 years) in vitroZakutskiĭ 2006Dzhokhadze 2012
Duration
—
Not specified
Khavinson protocols typically 10–20 days per cycle; no long-term safety data.
04Side Effects & Safety
Parameter
HCG
Prostamax
Injection site reaction
Pain, erythema (mild, transient)
—
Gynecomastia
Aromatization of elevated testosterone to estradiol; dose-dependent
—
Testicular discomfort / Edema
Rapid testicular growth in hypogonadal males; usually self-limiting
—
Polycythemia
Elevated hematocrit from supraphysiological testosterone; monitor CBC
—
Mood / Libido changes
Variable; usually positive with normalization of testosterone
—
Acne / Oily skin
Androgen-mediated; dose-dependent
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Prostate concerns
Monitor PSA in older males; hCG restores physiological testosterone (not supraphysiological)
—
Antibody formation
Rare with recombinant; possible with urinary-derived
—
Published adverse events
—
None reported in available literature
Genotoxicity signals
—
Increased sister chromatid exchange (SCE) — marker of DNA recombination/repair; unclear long-term implications
Metal ion interactions
—
Modulates Cu(II) and Cd(II) chromatin effects; unknown clinical relevance
Human safety data
—
Absent — no published Phase 1/2/3 trials
Absolute Contraindications
HCG
- ·Androgen-dependent malignancy (prostate, breast cancer)
- ·Hypersensitivity to hCG or excipients
- ·Precocious puberty
Prostamax
- ·Active prostate malignancy — epigenetic modulation effects unknown in cancer
Relative Contraindications
HCG
- ·Untreated obstructive sleep apnea
- ·Severe cardiovascular disease (polycythemia risk)
- ·History of thromboembolism
Prostamax
- ·History of prostate cancer — theoretical concern re: transcriptional activation
- ·Undiagnosed prostatic nodules or elevated PSA
05Administration Protocol
Parameter
HCG
Prostamax
1. Reconstitution (if lyophilized)
Add sterile water or bacteriostatic water per manufacturer instructions. Typically 1–2 mL per 5,000–10,000 IU vial. Roll gently — do not shake. Solution should be clear.
Subcutaneous or intramuscular — per Khavinson bioregulator tradition. No published human pharmacokinetic data.
2. Injection site
Intramuscular: ventrogluteal, vastus lateralis, or deltoid. Subcutaneous: abdomen, avoiding navel (2-inch radius). Rotate sites to prevent lipohypertrophy.
If lyophilised: reconstitute with sterile water per manufacturer protocol (not standardized in literature).
3. Timing
Administer 2–3 times per week. Consistent weekly schedule recommended (e.g., Monday/Thursday or Monday/Wednesday/Friday).
Typically daily or every-other-day in Russian clinical tradition; duration 10–20 days per cycle.
4. Storage
Lyophilized: room temperature, light-protected. Reconstituted: refrigerate 2–8 °C. Bacteriostatic water extends shelf life to ~30 days; sterile water use within 72 hours.
No established biomarkers. Theoretical: PSA, prostate imaging, symptom scores (IPSS for BPH).
5. Needle selection
IM: 21–23G, 1–1.5 inch. SQ: 25–27G, 5/8 inch. Inject slowly (30–60 seconds for IM).
All protocols derived from non-peer-reviewed Russian clinical practice; Western regulatory approval absent.