Comparison
Epitalon vs L-Theanine
Side-by-side of Epitalon and L-Theanine. Every row below is pulled from the compound schema and will update as our data grows. For deeper reads, follow through to each compound page.
Epitalon
Epitalon peptide (Epithalon, tetrapeptide AEDG): telomerase activation, lifespan extension data, anti-aging trials, dosage, half-life, and safety.
L-Theanine
L-theanine is a non-protein amino acid found in tea leaves. The most-replicated nootropic; pairs with caffeine at 1:1 (100-200 mg each) for acute focus.
Effects at a glance
Epitalon
- •Synthetic tetrapeptide (Ala-Glu-Asp-Gly) developed at the St. Petersburg Institute of Bioregulation
- •Russian clinical literature reports mortality reduction in elderly cohorts and improved melatonin output
- •Reported telomerase activation in human somatic cell culture and lifespan extension in mice and Drosophila
- •Independent Western replication is essentially absent; no FDA-standard RCTs
- •Anecdotal protocols use 5 to 10 mg subcutaneously daily for 10 to 20 day cycles, 2 to 4 times yearly
- •Not currently on the WADA Prohibited List
L-Theanine
- •Non-protein amino acid in tea; the most-replicated nootropic in the human RCT literature
- •Caffeine + theanine at 1:1 (100-200 mg each) is the gold-standard acute focus stack
- •Solo doses of 200-400 mg reduce subjective stress and improve sleep quality
- •Increases alpha-wave EEG activity within 30-45 minutes of 200 mg oral dose
- •Crosses blood-brain barrier; bioavailability high, half-life 60-90 minutes
- •Clean safety record; minimal interactions at supplement doses
Side-by-side
| Attribute | Epitalon | L-Theanine |
|---|---|---|
| Category | peptide | supplement |
| Also known as | Epithalon, Ala-Glu-Asp-Gly, AEDG, Epithalamin (precursor extract) | theanine, gamma-glutamylethylamide |
| Half-life (hr) ↗ | 0.5 | 1.5 |
| Typical dose (mg) ↗ | 5 | 200 |
| Dosing frequency | daily during cycle | as needed (with caffeine) or daily |
| Routes | subcutaneous, intramuscular, intranasal | oral |
| Onset (hr) | 24 | 0.5 |
| Peak (hr) | 168 | 1 |
| Molecular weight | 390.35 | 174.2 |
| Molecular formula | C14H22N4O9 | C7H14N2O3 |
| Mechanism | Synthetic tetrapeptide proposed to interact directly with DNA and chromatin to modulate tissue-specific gene expression. Reported effects include telomerase activation, increased melatonin output from pineal cells, and circadian normalization. | Crosses BBB; modulates GABA/dopamine/serotonin (modest); increases alpha-wave EEG activity; dampens stress-induced sympathetic response without sedation. |
| Legal status | Not FDA approved; registered in Russia under domestic pharmaceutical framework; research-use-only grey market in US/EU | OTC dietary supplement |
| WADA status | unknown | allowed |
| DEA / Rx | Not scheduled (research chemical) | OTC supplement |
| Pregnancy | Insufficient data; not recommended | Insufficient supplement-dose data; tea-source intake safe |
| CAS | 307297-39-8 | 3081-61-6 |
| PubChem CID | 219042 | 439378 |
| Wikidata | Q5384126 | Q909931 |
Safety profile
Epitalon
Common side effects
- injection-site reactions
- occasional mild headache (rare)
Contraindications
- pregnancy
- lactation
- active malignancy (theoretical telomerase concern)
- concurrent immunosuppression
Interactions
- melatonin: potential additive effect on circadian and pineal output; no controlled data(minor)
L-Theanine
Common side effects
- mild GI upset (rare)
- headache (rare)
Contraindications
- pregnancy / lactation (insufficient data at supplement doses)
- concurrent strong GABAergics without caution
Interactions
- caffeine: synergistic for acute focus; dampens jitter without blunting alertness(minor)
- benzodiazepines / alcohol: potential additive sedation(minor)
Which Should You Take?
L-Theanine comes out ahead for most readers on the criteria we weight: 3 catalogued goals, OTC dietary supplement, oral dosing, with a Tier-A outcome catalogued. Epitalon is the right call when one of the conditionals below applies.
- → If your priority is healthspan extension, pick Epitalon.
- → If your priority is circadian regulation, pick Epitalon.
- → If your priority is focus or working memory, pick L-Theanine.
- → If your priority is stress and HPA-axis regulation, pick L-Theanine.
Edge case: If you want to avoid research-only / gray-market sourcing, L-Theanine is the more accessible choice.
Default choice: L-Theanine. Lower friction to source, a Tier-A evidence outcome catalogued, and broader goal coverage. Reach for Epitalon only if your priority sits squarely in the goals it owns above.
This verdict is generated from each compound's schema (goals, legal status, evidence outcomes, dosing route). It updates automatically as our compound data evolves; the deeper read sits on each individual compound page.
Common questions
What is the difference between Epitalon and L-Theanine?
Epitalon and L-Theanine differ in category (peptide vs supplement), mechanism, and typical dosing. See the side-by-side table for full details.
Which has a longer half-life, Epitalon or L-Theanine?
Epitalon half-life is 0.5 hours; L-Theanine half-life is 1.5 hours.
Can you stack Epitalon with L-Theanine?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
Go deeper