Comparison
Melatonin vs Vinpocetine
Melatonin
Pineal hormone regulating circadian rhythm. Low doses (0.3-1mg) often outperform higher doses for sleep.
Vinpocetine
Semi-synthetic derivative of vincamine from periwinkle. Increases cerebral blood flow.
| Field | Melatonin | Vinpocetine |
|---|---|---|
| Category | neuroprotective | neuroprotective |
| Dose range | 0.3–3mg | 5–30mg |
| Half-life | 1h | 2h |
| Onset | 30min | — |
| Evidence | EVIDENCEA | EVIDENCEB |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USOTC | USBanned |
| PubMed refs | 28000 | 600 |
The comparison in plain English
Auto-generated from dataMelatonin and Vinpocetine are both in the neuroprotective category respectively. Melatonin Pineal hormone regulating circadian rhythm. Vinpocetine Semi-synthetic derivative of vincamine from periwinkle.
Bottom line
Melatonin (evidence A, safety 5/5) has a weaker evidence base than Vinpocetine (evidence B, safety 4/5). Melatonin has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
Choose Melatonin if
Melatonin is the better fit when your goal aligns with its mechanism (Endogenous hormone produced by the pineal gland in response to darkness, signalling the circadian sleep window) and the dose range (0.3–3mg) suits your protocol. Half-life is 1h.
Choose Vinpocetine if
Vinpocetine is the better fit when your goal aligns with its mechanism (Inhibits phosphodiesterase 1 (PDE1), increasing intracellular cGMP and producing vasodilation specifically in cerebral arterioles) and the dose range (5–30mg) suits your protocol. Half-life is 2h.