Comparison
AOD-9604 vs L-Theanine
Side-by-side of AOD-9604 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.
AOD-9604
AOD 9604 peptide: 16-amino-acid hGH fragment 176-191. Preclinical lipolytic activity, phase 2 obesity trial showed no weight loss vs placebo.
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
AOD-9604
- •Modified 16-amino-acid synthetic fragment of human growth hormone (residues 176-191)
- •Preclinical models show lipolytic activity in adipose tissue without GH-axis growth effects
- •Phase 2 obesity trial (Heffernan 2001) showed no significant weight-loss difference versus placebo
- •Anecdotal protocols use 250 to 500 mcg subcutaneously daily on an empty stomach
- •No FDA approval; the obesity drug development program was discontinued in 2007
- •Granted GRAS status in some jurisdictions for compounded use; not validated for fat loss in humans
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 | AOD-9604 | L-Theanine |
|---|---|---|
| Category | peptide | supplement |
| Also known as | hGH fragment 176-191, Human Growth Hormone Fragment 176-191 | theanine, gamma-glutamylethylamide |
| Half-life (hr) ↗ | 0.5 | 1.5 |
| Typical dose (mg) ↗ | 0.3 | 200 |
| Dosing frequency | daily | as needed (with caffeine) or daily |
| Routes | subcutaneous | oral |
| Onset (hr) | 1 | 0.5 |
| Peak (hr) | 2 | 1 |
| Molecular weight | 1815.17 | 174.2 |
| Molecular formula | C78H125N23O23S2 | C7H14N2O3 |
| Mechanism | Modified C-terminal fragment of human growth hormone proposed to stimulate beta-3 adrenergic receptor signaling in adipocytes, increasing lipolysis and fatty-acid oxidation without engaging the GH receptor or activating IGF-1. | Crosses BBB; modulates GABA/dopamine/serotonin (modest); increases alpha-wave EEG activity; dampens stress-induced sympathetic response without sedation. |
| Legal status | Not FDA approved; research-use-only grey market in most jurisdictions | OTC dietary supplement |
| WADA status | unknown | allowed |
| DEA / Rx | Not FDA approved; not scheduled; research-chemical status | OTC supplement |
| Pregnancy | Insufficient data; not recommended | Insufficient supplement-dose data; tea-source intake safe |
| CAS | 221231-10-3 | 3081-61-6 |
| PubChem CID | 71300630 | 439378 |
| Wikidata | Q4654106 | Q909931 |
Safety profile
AOD-9604
Common side effects
- injection-site reactions
- transient mild headache (anecdotal)
- minimal in clinical trials
Contraindications
- pregnancy
- lactation
- no established human safety profile for chronic use
Interactions
- beta-blockers: theoretical antagonism of beta-3 adrenergic lipolytic signaling(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. AOD-9604 is the right call when one of the conditionals below applies.
- → If your priority is fat loss, pick AOD-9604.
- → If your priority is body composition, pick AOD-9604.
- → 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 AOD-9604 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 AOD-9604 and L-Theanine?
AOD-9604 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, AOD-9604 or L-Theanine?
AOD-9604 half-life is 0.5 hours; L-Theanine half-life is 1.5 hours.
Can you stack AOD-9604 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