5-HTP and Melatonin
5-HTP raises serotonin, the precursor to melatonin; stacking both supplements is usually unnecessary and can be over-sedating for some people.
5-HTP
A direct serotonin precursor for mood and sleep, use with care.
Melatonin
The body's own sleep-timing signal.
Combine with care
These can compete for absorption or interact; separate the timing or keep the doses balanced rather than taking large amounts together.
How to take them
5-HTP
- Dose
- 50–300 mg per day
- Timing
- Evening for sleep; with food to reduce nausea. Start low (50 mg) to assess tolerance
Melatonin
- Dose
- 0.3–1 mg to start; most people do not need more than 3 mg
- Timing
- 30–60 minutes before bed; for jet lag, at your target bedtime in the new time zone
Buying 5-HTP and Melatonin?
Choose third-party-tested brands in the forms we recommend on each supplement's page.
Some links below are affiliate links: if you buy through them we may earn a small commission at no extra cost to you. It never changes our ratings or evidence grades.
Frequently asked
Can you take 5-HTP and Melatonin together?
It's best to separate them across the day or balance the doses rather than taking large amounts at the same moment. 5-HTP raises serotonin, the precursor to melatonin; stacking both supplements is usually unnecessary and can be over-sedating for some people.
What's the best time to take 5-HTP and Melatonin?
Space them out. 5-HTP: Evening for sleep; with food to reduce nausea. Start low (50 mg) to assess tolerance. Melatonin: 30–60 minutes before bed; for jet lag, at your target bedtime in the new time zone.
How do 5-HTP and Melatonin interact?
Use with care: Can compete, deplete, or interact; time or balance them. 5-HTP raises serotonin, the precursor to melatonin; stacking both supplements is usually unnecessary and can be over-sedating for some people.
Related pairings
5-HTP + Vitamin B6 (Pyridoxine)
Vitamin B6 (P5P) is the cofactor that converts 5-HTP into serotonin, so adequate B6 status is needed for it to work.
5-HTP + L-Tryptophan
5-HTP is the metabolite tryptophan is converted into. It skips the rate-limiting step for a more direct serotonin boost, but stacking the two (or either with SSRIs) raises serotonin-excess risk.
5-HTP + Magnesium
Often combined for sleep and mood; magnesium supports the broader serotonin and relaxation pathways.
L-Theanine + Melatonin
L-theanine calms mental chatter and melatonin advances sleep timing; together they address both the 'wired mind' and the 'wrong clock' causes of poor sleep onset.