5-HTP
The serotonin route to appetite
- Type
- Serotonin precursor
- Typical amount
- Studies have used roughly 50–300 mg per day, often before meals.
- Best taken
- As directed on the formula label
- Caffeine
- None
- Main source
- It is not common in food; supplements use extract from the African Griffonia plant’s seeds.
- Evidence level
- Limited / emerging
5-HTP is a compound the body makes from tryptophan and uses to produce serotonin; supplements derive it from Griffonia seeds.
What is 5-HTP?
5-HTP is a compound the body makes from tryptophan and uses to produce serotonin; supplements derive it from Griffonia seeds.
How 5-HTP works in the body
By supporting serotonin, it is studied for appetite control and reducing carbohydrate-driven snacking. In practical terms, this is the mechanism weight-loss formulas are counting on when they include 5-htp.
What the research says about 5-HTP and weight
Human research on 5-HTP specifically for weight is limited or early-stage. Much of the rationale comes from traditional use, lab studies, or its general nutritional role. That doesn’t mean it doesn’t help — only that strong clinical proof for a weight effect isn’t established yet.
How much 5-HTP to take
Studies have used roughly 50–300 mg per day, often before meals. Always check the label of your specific formula — blends often contain less 5-htp than studies use, especially inside proprietary blends that don’t disclose exact amounts.
Food sources and supplement forms
It is not common in food; supplements use extract from the African Griffonia plant’s seeds.
Why 5-HTP appears in weight-loss formulas
It is included for the appetite-and-cravings side of weight management via serotonin.
Safety, side effects and interactions
It can cause nausea or drowsiness and should not be combined with antidepressants or other serotonergic drugs without medical advice. As with any supplement, if you are pregnant, breastfeeding, taking medication or managing a health condition, check with your doctor first.
How to choose a quality 5-HTP supplement
When choosing a 5-HTP product or a formula containing it, look for one that discloses the actual amount of 5-htp (not just a proprietary-blend total), uses a recognizable form, and is made by a brand with third-party testing or GMP manufacturing. More isn’t always better — match the dose to what research and the label suggest, and be wary of products that hide quantities behind a blend.
The serotonin route to appetite
5-HTP feeds into serotonin, a brain chemical that helps signal fullness — hence its use for cravings.
Common questions about 5-HTP
What does 5-HTP do for weight loss?
How much 5-HTP should I take?
Is 5-HTP safe?
How strong is the evidence for 5-HTP?
Will 5-HTP alone make me lose weight?
Does the dose in supplements match research?
Supplements with 5-HTP
Formulas in the SourceLean directory that list 5-HTP or a closely related form among their ingredients:
Related ingredients
Explore other compounds commonly found in weight-loss formulas:
Ingredient insights, explained
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