Comparison
L-Theanine vs Pantogam (Hopantenic Acid)
L-Theanine
An amino acid found almost exclusively in tea leaves. Promotes relaxed alertness via alpha-wave promotion and GABA/serotonin/dopamine modulation. Pairs with caffeine in a 1:2 ratio to produce the most-validated focus synergy in the nootropic literature. Essentially no side-effect or interaction profile at typical doses.
Pantogam (Hopantenic Acid)
Russian prescription nootropic combining pantothenic acid (B5) and GABA. Used for ADHD, anxiety, and pediatric cognitive disorders in Russia.
| Field | L-Theanine | Pantogam (Hopantenic Acid) |
|---|---|---|
| Category | amino-acid | amino-acid |
| Dose range | 100–400mg | 250–1500mg |
| Half-life | 1h | — |
| Onset | 30min | — |
| Evidence | EVIDENCEA | EVIDENCEC |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USOTC | USResearch chemical |
| PubMed refs | 720 | 30 |
The comparison in plain English
Auto-generated from dataL-Theanine and Pantogam (Hopantenic Acid) are both in the amino-acid category respectively. L-Theanine An amino acid found almost exclusively in tea leaves. Pantogam (Hopantenic Acid) Russian prescription nootropic combining pantothenic acid (B5) and GABA.
Bottom line
L-Theanine (evidence A, safety 5/5) has a weaker evidence base than Pantogam (Hopantenic Acid) (evidence C, safety 4/5). L-Theanine has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
Choose L-Theanine if
L-Theanine is the better fit when your goal aligns with its mechanism (Crosses the blood-brain barrier within ~30 minutes of oral dosing) and the dose range (100–400mg) suits your protocol. Half-life is 1h.
Choose Pantogam (Hopantenic Acid) if
Pantogam (Hopantenic Acid) is the better fit when your goal aligns with its mechanism (A hybrid molecule of pantothenic acid (vitamin B5) and GABA) and the dose range (250–1500mg) suits your protocol. Half-life is —h.