5-HTP vs L-Tryptophan
Evidence-based comparison from our database of 3,862 ingredients
TL;DR
5-HTP is typically chosen for serotonin precursor, while L-Tryptophan is used for falling asleep. Neither outranks the other. The right pick depends on the goal, and the two are not interchangeable.
5-HTP
May gently lift mood and improve sleep quality.
Commonly used for:
L-Tryptophan
May help improve sleep and mood, especially when related to serotonin levels.
Commonly used for:
Side-by-Side Comparison
| Factor | 5-HTP | L-Tryptophan |
|---|---|---|
| Research depth | Studied | Well studied |
| Effective Dose | 50-200mg | 500-1000mg |
| Time to Effect | Effects may be noticeable within a few hours, but consistent use over several days is often needed to assess full benefits | Effects may be noticeable after several days of consistent use, though some users report feeling subtle changes sooner |
| Commonly used for | serotonin precursor, evening wind-down | Falling asleep, Evening wind-down |
Which fits which goal
These two do different jobs, so the comparison ends at the goal, not at a ranking. Match the ingredient to what you are trying to change and check the dose against the amount on the label.
Reach for 5-HTP when:
- • The goal is serotonin precursor
- • The goal is evening wind-down
Reach for L-Tryptophan when:
- • The goal is falling asleep
- • The goal is evening wind-down
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Browse the libraryThis comparison is for informational purposes only and should not replace professional medical advice. Always consult a healthcare provider before starting any supplement regimen, especially if you have existing health conditions or take medications.