HCG (Human Chorionic Gonadotropin) vs SS-31
Updated July 27, 2026 · Reviewed by the PeptidesDB Editorial team
A data-driven comparison of HCG (Human Chorionic Gonadotropin) and SS-31 (also searched as SS-31 vs HCG (Human Chorionic Gonadotropin)) — effect profiles, evidence, side effects, and which suits weight loss, muscle, or healing goals.
Verdict
HCG (Human Chorionic Gonadotropin) centers on healing, while SS-31 leans toward inflammation. On indexed research, SS-31 is ahead (HCG (Human Chorionic Gonadotropin): 16 studies, Human evidence; SS-31: 19, Human evidence). Choose by goal — and read the primary studies. This is research information, not medical advice.
Key takeaways
- •HCG (Human Chorionic Gonadotropin) is strongest for healing; SS-31 for inflammation.
- •Evidence: HCG (Human Chorionic Gonadotropin) Human evidence (16 studies) vs SS-31 Human evidence (19).
- •Check the FDA-approval status chips above before assuming a legal use pathway.
Effect profiles, overlaid
At a glance
Human Chorionic Gonadotropin | LH Receptor Agonist
Mitochondrial-Targeted Peptide | Cardiolipin Protector
HCG (Human Chorionic Gonadotropin) vs SS-31: side-by-side
| Metric | HCG (Human Chorionic Gonadotropin) | SS-31 |
|---|---|---|
| Class | Sexual Health | Longevity |
| Regulatory status | FDA-approved | Research use only |
| Evidence grade | Human evidence | Human evidence |
| Studies indexed | 16 | 19 |
| Research level | FDA Approved | Well Studied |
| Strongest effect | Healing & recovery | Inflammation & immune |
| Healing & recovery | 3.0▲ | 3.0▲ |
| Muscle & body comp | 2.0▲ | 2.0▲ |
| Metabolic & appetite | 3.0 | 4.0▲ |
| Neuro & mood | 1.0 | 3.0▲ |
| Sleep & circadian | 0.0 | 1.0▲ |
| Inflammation & immune | 1.0 | 4.0▲ |
| Skin & aesthetics | 2.0▲ | 0.0 |
▲ marks the higher AI-assigned effect score (0–5, describing where the literature concentrates — not clinical efficacy).
Mechanism & pharmacokinetics
| Property | HCG (Human Chorionic Gonadotropin) | SS-31 |
|---|---|---|
| Mechanism | LH/CG receptor agonist | Targets inner mitochondrial membrane to enhance function and reduce ROS |
| Route | Subcutaneous injection | Subcutaneous injection |
| Half-life | ~24 hours | — |
| Time to peak | 6–24 hours | — |
| Duration of action | Varies | — |
Established pharmacology — curated for well-characterized compounds and AI-summarized otherwise. A blank (—) means no reliable single value is published (half-life figures for some peptides genuinely disagree across sources). Verify against primary sources such as FDA labels and ClinicalTrials.gov.
What is HCG (Human Chorionic Gonadotropin)?
HCG (Human Chorionic Gonadotropin) is an FDA-approved glycoprotein hormone that mimics luteinizing hormone, used to stimulate endogenous testosterone production and support fertility in men and women.
Full HCG (Human Chorionic Gonadotropin) profile, mechanism & studies →What is SS-31?
### Summary SS-31, also known as Elamipretide, is a peptide that has garnered attention for its potential role in mitochondrial protection and its implications in various health conditions, particularly those involving oxidative stress and mitochondrial dysfunction.
Full SS-31 profile, mechanism & studies →Which is better for your goal?
| Goal | Better fit | Why |
|---|---|---|
| Healing | Even | Both ~3.0/5 |
| Muscle | Even | Both ~2.0/5 |
| Metabolic | SS-31 | 4.0/5 effect signal |
| Neuro | SS-31 | 3.0/5 effect signal |
| Sleep | SS-31 | 1.0/5 effect signal |
| Inflammation | SS-31 | 4.0/5 effect signal |
| Skin | HCG (Human Chorionic Gonadotropin) | 2.0/5 effect signal |
Fit reflects community-perceived effect profiles — not head-to-head trials. Read each peptide's studies before deciding.
Can you stack HCG (Human Chorionic Gonadotropin) and SS-31?
People sometimes combine peptides that target different pathways, but there is little controlled research on this specific pairing and the interactions aren't well characterized. Because at least one is a research-use compound, we don't publish stacking or dosing protocols here. Any combination should be discussed with a qualified clinician.
HCG (Human Chorionic Gonadotropin) vs SS-31: side effects
No community-reported effects logged yet.
No community-reported effects logged yet.
Anonymous community reports (count = number of reports), not clinical incidence rates.
What the research says
HCG (Human Chorionic Gonadotropin) has 16 approved studies indexed (Human evidence), and SS-31 has 19 (Human evidence). The Librarian re-checks PubMed, Europe PMC and ClinicalTrials daily, so these counts move. Open each profile to read the summaries and sources.
Frequently asked questions
Is HCG (Human Chorionic Gonadotropin) or SS-31 better?
It depends on your goal. HCG (Human Chorionic Gonadotropin) is strongest for healing; SS-31 for inflammation. SS-31 has more indexed studies (19). See the goal-by-goal breakdown above.
Is HCG (Human Chorionic Gonadotropin) or SS-31 better for weight loss?
SS-31 shows the stronger metabolic & appetite profile (4.0/5) in the AI-assigned effect profile — though weight-loss outcomes depend on the individual and the evidence base.
Is HCG (Human Chorionic Gonadotropin) or SS-31 better for muscle?
Both land close on the muscle & body-composition axis.
Which has more research, HCG (Human Chorionic Gonadotropin) or SS-31?
HCG (Human Chorionic Gonadotropin) has 16 approved studies indexed (Human evidence); SS-31 has 19 (Human evidence). Higher counts mean more to read, not proven superiority.
Can you stack HCG (Human Chorionic Gonadotropin) and SS-31?
Some users combine peptides, but there's little controlled data on this specific pairing, and interactions aren't well characterized. We don't publish stacking protocols for compounds that aren't FDA-approved. Discuss any combination with a qualified clinician.
What are the side effects of HCG (Human Chorionic Gonadotropin) vs SS-31?
HCG (Human Chorionic Gonadotropin): no community-reported effects logged yet. SS-31: none logged yet. These are anonymous reports, not incidence rates — see each profile.
Is HCG (Human Chorionic Gonadotropin) or SS-31 FDA-approved?
HCG (Human Chorionic Gonadotropin) is FDA-approved. SS-31 is not FDA-approved. Research-use status is not a legal clearance to compound or use in humans.
Is SS-31 better than HCG (Human Chorionic Gonadotropin)?
For inflammation, SS-31 has the edge; for healing, HCG (Human Chorionic Gonadotropin) does. Neither is universally "better" — it's goal-dependent, and both should be weighed against their evidence base above.
Comparing related peptides
Regulatory & legal status
Approval status varies (see the chips at the top). FDA approval and compounding rules for peptides change frequently, and research-use status is not a legal clearance for human use. The FDA does not review compounded drugs for safety, effectiveness, or quality. Verify current status with primary sources before acting. Last reviewed July 27, 2026.