Comparison
Melatonin vs Astaxanthin
Melatonin
Pineal hormone regulating circadian rhythm. Low doses (0.3-1mg) often outperform higher doses for sleep.
Astaxanthin
Red carotenoid pigment with high antioxidant potency. Crosses the blood-brain barrier and the blood-retinal barrier. Found in salmon, krill, and microalgae.
| Field | Melatonin | Astaxanthin |
|---|---|---|
| Category | neuroprotective | neuroprotective |
| Dose range | 0.3–3mg | 4–12mg |
| Half-life | 1h | — |
| Onset | 30min | — |
| Evidence | EVIDENCEA | EVIDENCEB |
| Safety | ●●●●● | ●●●●● |
| Legal (US) | USOTC | USOTC |
| PubMed refs | 28000 | 2700 |
The comparison in plain English
Auto-generated from dataMelatonin and Astaxanthin are both in the neuroprotective category respectively. Melatonin Pineal hormone regulating circadian rhythm. Astaxanthin Red carotenoid pigment with high antioxidant potency.
Bottom line
Melatonin (evidence A, safety 5/5) has a weaker evidence base than Astaxanthin (evidence B, safety 5/5). 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 Astaxanthin if
Astaxanthin is the better fit when your goal aligns with its mechanism (A red carotenoid with antioxidant capacity approximately 500-1000x stronger than vitamin E and 10x stronger than beta-carotene by some measures) and the dose range (4–12mg) suits your protocol. Half-life is —h.