The Claim
The elimination half-life of melatonin in human serum remains consistent across intravenous and oral administration routes at doses of 2 mg and 4 mg, demonstrating that its clearance rate is independent of the initial delivery method.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
This means that no matter whether you take melatonin as a pill or get it through an IV, your body clears it out at the exact same speed once it's in your blood. The way you initially get the supplement into your system doesn't change how long it stays in your body.
See the scientific wording
The elimination half-life of melatonin in human serum remains consistent across different administration routes, showing no significant variation between intravenous injection and oral ingestion at doses of 2 mg and 4 mg. This pharmacokinetic stability suggests that once melatonin enters the bloodstream, its clearance rate is independent of the initial delivery method.
What the research says
1 studyStudy: The Absolute Bioavailability of Oral Melatonin
The abstract explicitly states that blood sampling across all study phases revealed identical serum half-lives regardless of whether melatonin was administered intravenously or orally at 2 mg or 4 mg doses. This direct comparison of elimination kinetics provides the evidence for route-independent clearance.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.