5-HTP and 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
A direct serotonin precursor for mood and sleep, use with care.
L-Tryptophan
The dietary precursor to serotonin and melatonin.
Great to combine
These two are frequently stacked together; they complement each other and are commonly taken at the same time.
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
L-Tryptophan
- Dose
- 500–2,000 mg per day
- Timing
- Evening on an empty stomach, or with a small carbohydrate snack to improve brain uptake
Frequently asked
Can you take 5-HTP and L-Tryptophan together?
Yes, they are commonly taken together. 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.
What's the best time to take 5-HTP and L-Tryptophan?
Around the same time works well. 5-HTP: Evening for sleep; with food to reduce nausea. Start low (50 mg) to assess tolerance. L-Tryptophan: Evening on an empty stomach, or with a small carbohydrate snack to improve brain uptake.
How do 5-HTP and L-Tryptophan interact?
Synergy: Work better together than alone. 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.
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 + Magnesium
Often combined for sleep and mood; magnesium supports the broader serotonin and relaxation pathways.
L-Tryptophan + Vitamin B6 (Pyridoxine)
B6 is required to convert 5-HTP into serotonin; taking it with tryptophan is a common mood stack.
Folate (B9) + L-Tryptophan
Folate supports the methylation cycle needed to recycle and activate neurotransmitter cofactors.