Epithalon vs Glycine Peptide
Overview
Epithalon and Glycine Peptide are both sleep & recovery peptides, but they differ in mechanism, dosing, and regulatory status.
This page compares Epithalon and Glycine Peptide across their primary use, typical dosing, reported benefits and side effects, and U.S. regulatory status. For the full monograph on either compound — mechanism of action, clinical research, and references — follow the article links.
Side-by-side comparison
| Epithalon | Glycine Peptide | |
|---|---|---|
| Category | Sleep & Recovery | Sleep & Recovery |
| Regulatory status (US) | Compounding (Rx) — Apr 2026 | Research use only |
| Typical dosage | 5-10 mg | 3-5 g |
| Frequency | cycle protocol | before bed |
| Reported benefits | Improved sleep quality, circadian rhythm regulation, anti-aging | Improved sleep quality, faster sleep onset, better morning alertness |
| Reported side effects | Minimal side effects during cycles | Very safe |
Key differences
Primary use. Epithalon is categorised under Sleep & Recovery, while Glycine Peptide falls under Sleep & Recovery. Because they target a similar goal, they are common alternatives to weigh against each other.
Regulatory status. Epithalon: not FDA-approved; compounding permitted with a prescription as of April 2026. Glycine Peptide: not FDA-approved; treated as a research compound.
Dosing. Epithalon is typically dosed at 5-10 mg (cycle protocol). Glycine Peptide is typically dosed at 3-5 g (before bed).
Can you stack them?
Some protocols combine peptides, but stacking Epithalon and Glycine Peptide has not been validated for safety or efficacy in controlled trials. Combining compounds can change their effects and risks. Nothing here is medical advice — consult a qualified healthcare provider before starting or combining any protocol.
Frequently asked questions
- What is the difference between Epithalon and Glycine Peptide?
- Epithalon and Glycine Peptide are both sleep & recovery peptides, but they differ in mechanism, dosing, and regulatory status. Epithalon is not FDA-approved; compounding permitted with a prescription (as of April 2026), whereas Glycine Peptide is not FDA-approved; generally classified as a research compound.
- What is Epithalon used for?
- Circadian rhythm regulator.
- What is Glycine Peptide used for?
- Sleep quality amino peptide.
- Can you take Epithalon and Glycine Peptide together?
- Some users combine peptides within a single protocol, but stacking Epithalon and Glycine Peptide has not been established as safe or effective in controlled trials. Neither this comparison nor PeptideSciences101 is medical advice — consult a qualified healthcare provider before combining any compounds.
- Is Epithalon or Glycine Peptide FDA-approved?
- Epithalon is not FDA-approved; compounding permitted with a prescription (as of April 2026). Glycine Peptide is not FDA-approved; generally classified as a research compound.
Read the full articles
- Epithalon — full monograph: mechanism, research, dosing & references
- Glycine Peptide — full monograph: mechanism, research, dosing & references