5-HTP 50 mg

5-HTP 50 mg

Natrol4.8 (271 ratings)
Format:Capsule Quantity: 45 Capsule(s) · 45 servings
Goals
$13.07 $0.29 per serving
iHerbLowest$13.07Vitacost$13.89

About this product

The 50 mg 5-HTP serving is suitable for people who prefer to start low and judge tolerance before increasing intake. Griffonia simplicifolia is identified as the source, and the focused capsule avoids unrelated active ingredients.

The ingredient may support sleep, mood, or stress through serotonin production, but it does not address those goals broadly. No circadian, relaxation, or stress-adaptation ingredient complements the lower amount.

No standardization percentage or comfort-focused release feature is shown. The supplied label information also lacks a serotonin-medication warning, while the amount delivered is less economical than several comparable options.

Who is it for
  • People seeking a lower introductory 5-HTP amount
  • Users who want a basic single-active capsule
Best for
  • Gradual tolerance assessment
  • Simple serotonin-pathway support

Pros

  • Lower 50 mg amount
  • Names Griffonia simplicifolia
  • Single-active formula is easy to combine

Cons

  • No extract standardization percentage
  • No specialized release feature
  • Limited value for the active amount

Warnings

  • Do not combine 5-HTP with SSRIs, SNRIs, MAO inhibitors, triptans, or other serotonin-raising medicines without medical supervision.
  • 5-HTP may cause nausea, stomach discomfort, drowsiness, or vivid dreams.
  • Use care with other sedating products until its effect is known.

Product analysis

73 out of 100
A modest Griffonia-derived serving supports cautious use, but the basic formula offers little differentiation. Incomplete standardization and safety labeling are notable gaps.

AI assessment of the formula, label and price. How scoring works

Nutrient quality84

Griffonia simplicifolia is identified as the source, but the plant part and active standardization are not both clear. The 50 mg 5-HTP serving is a cautious starting amount, while the focused design avoids unrelated actives.

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Ingredient transparency82

All supplied active ingredients have specific amounts, and no proprietary blend hides key doses. Serving count is available, but full intake directions, excipients, and a serotonin-medication warning are absent from the supplied label details.

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Customer satisfaction66

The supplied aggregate rating is strong, though its reliability depends heavily on the available review volume. No review text is provided to identify repeated complaints or firsthand experiences tied to the intended uses.

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Value for money54

Cost efficiency per equivalent active amount appears weak, with the starting-level dose shaping practical value. The single-active formula does not use decorative ingredients to justify its cost.

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Format
Capsule
Container
45 Capsule(s)
Per serving
$0.29
Customer rating
4.8 · 271 ratings
Report analysis

Goals

Mood Support
Mood Support
Impact
High effect
B Ingredient FitF PathwaysA EvidenceA+ Formulation Logic
5-HTP · 50 mg

5-HTP is a building block your body uses to make serotonin, a chemical messenger associated with mood. That mechanism doesn't show that taking it will improve everyday emotional well-being. The declared 50 mg serving provides a known amount, but a reliable general-use mood benefit at that amount remains unclear.

How this product is rated for Mood Support

Ingredient fit76

5-HTP supplies a serotonin building block, but everyday mood improvement remains uncertain.
Goal fit
5-HTP provide the main ingredient connections to mood.
Dose adequacy
5-HTP 50 mg. These amounts refer to one label serving; they do not imply daily intake or guaranteed benefit.

Pathways19

5-HTP supplies a serotonin building block, but everyday mood improvement remains uncertain.
Depth
5-HTP supplies a serotonin building block, but everyday mood improvement remains uncertain.
Breadth
5-HTP supplies a serotonin building block, but everyday mood improvement remains uncertain.

Evidence94

5-HTP supplies a serotonin building block, but everyday mood improvement remains uncertain. Benefits depend on the ingredient and the circumstances described.
Evidence strength
5-HTP supplies a serotonin building block, but everyday mood improvement remains uncertain.
Studied preparation
The declared preparations do not make everyday mood improvement certain; the ingredient-specific limits still apply.

Formulation logic100

The ingredients can have individual roles without an extra partner. No particular conflict is identified.
Partner coverage
The relevant ingredients do not require an additional missing partner for their individual roles.
Conflicts
No particular ingredient conflict is identified.
Effective doses
The relevant ingredient amounts are disclosed; the reference comparisons do not guarantee a mood benefit.
Study evidence
5-HTP Supportive 9 studies
Sleep Support
Sleep Support
Impact
Moderate effect
B Ingredient FitD- PathwaysC- EvidenceA+ Formulation Logic

5-HTP may offer a limited, population-specific contribution to sleep through the serotonin–melatonin precursor route. Its 50 mg amount is at the lower end of the supplied sleep context, so the potential contribution is modest.

This is a one-ingredient formula focused on a single pathway, with no separate support for sleep timing or relaxation. The 5-HTP role remains uncertain outside the specific circumstances described in the supplied context.

How this product is rated for Sleep Support

Ingredient fit76

5-HTP is the only sleep-related ingredient, keeping the formula focused on one potential precursor role.
Goal fit
The product's potential sleep contribution comes from 5-HTP alone, without an off-goal active listed.
Dose adequacy
The 50 mg amount is at the lower end of the supplied sleep context, limiting its potential contribution.

Pathways40

The product's sole meaningful sleep route is through serotonin–melatonin precursors.
Depth
5-HTP provides the only substantial pathway, through sleep-related precursors.
Breadth
It does not add notable support for sleep timing, calming, or stress regulation.

Evidence58

5-HTP has a limited, population-specific potential role, so the likely sleep contribution remains modest.
Evidence strength
5-HTP is the only ingredient with a sleep-related role here, and that role is narrow.
Studied preparation
The product lists 5-HTP directly; no separate preparation distinction changes the supplied context.

Formulation logic100

5-HTP provides the potential role alone, with no listed sleep-conflicting stimulant.
Partner coverage
5-HTP is considered on its own, without a missing partner ingredient.
Conflicts
No listed caffeine or activating ingredient works against its sleep-focused approach.
Effective doses
The 50 mg amount supports a limited potential contribution, not a guaranteed improvement in sleep.
Study evidence
5-HTP Supportive 1 study
Stress Relief
Stress Relief
Impact
Moderate effect
B Ingredient FitF PathwaysC- EvidenceA+ Formulation Logic

Whether 5-HTP helps you manage everyday stress is unclear. It has a possible connection to anxiety and stress relief in particular circumstances, but that doesn't reliably predict how much calmer you'll feel day to day. The amount described here is for one serving; the directions allowing repeated servings don't establish a fixed daily amount.

How this product is rated for Stress Relief

Ingredient fit76

One serving provides 50 mg 5-HTP, compared with the 100 mg reference amount; this is not a minimum effective dose.
Goal fit
The present ingredients have conditional connections to anxiety or stress relief.
Dose adequacy
One serving provides 50 mg 5-HTP, compared with the 100 mg reference amount; this is not a minimum effective dose.

Pathways13

The ingredients relate mainly to mood-related processes, with a smaller connection to sleep recovery.
Depth
The ingredients relate mainly to mood-related processes, with a smaller connection to sleep recovery.
Breadth
Mood-related processes provide the main connection, with less support for other aspects of stress.

Evidence56

5-HTP and vitamin B6 have conditional links to anxiety or stress relief.
Evidence strength
5-HTP has a conditional connection to stress or anxiety relief; dependable everyday relief remains uncertain.
Studied preparation
The identified 5-htp preparation is relevant to the possible benefit, but doesn't guarantee the same effect for everyone.

Formulation logic100

The relevant ingredients do not require a missing partner for their individual roles. No particular ingredient conflict is identified.
Partner coverage
The relevant ingredients do not require a missing partner for their individual roles.
Conflicts
No particular ingredient conflict is identified.
Effective doses
One serving provides 50 mg 5-HTP, compared with the 100 mg reference amount; this is not a minimum effective dose.
Study evidence
5-HTP Supportive 18 studies

Ingredients

IngredientAmount per servingScore
5-HTP (Griffonia simplicifolia)
 50 mg 66
Adults 18–50 Dairy Free
Report overview
5-HTP (Griffonia simplicifolia) · 50 mg OverallScore66
B- Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyF Value
5-HTP 50 mg lists 50 mg per capsule and identifies Griffonia simplicifolia, but the saved facts don't give the extract's 5-HTP percentage. A specific warning names medicines that affect serotonin. Its cost per 100 mg is high.
How this ingredient is rated

Active Ingredient Quality & Bioavailability70

It names Griffonia simplicifolia, but the saved facts don't give the extract's 5-HTP percentage.
Botanical Source & Standardization
Griffonia simplicifolia is named, but the saved facts give no percentage of the extract standardized as 5-HTP.

Dose, Safety & Label Transparency79

It provides 50 mg per serving, and a specific warning about medicines that affect serotonin is recorded.
Dosage Potency & Range
The serving contains 50 mg, the standard starting amount in the supplied context.
Safety Warnings & Label Clarity
A specific warning names SSRIs, antidepressants, or other medicines that affect serotonin.

Value30

The cost per 100 mg is high.
Price per 100mg 5-HTP
The cost per 100 mg is high.
View ingredientView products
Loading alternative details
85 Performance

5-HTP 100 mg

NOW
Clearer botanical sourcing makes this a stronger quality alternative. Its 100 mg 5-HTP serving is more substantial than the original’s 50 mg amount. The same serious interaction caution with serotonin-raising medicines applies.
83 Performance

5-HTP 100 mg Extra Strength

Swanson
A more focused formula and stronger disclosed ingredient profile make this a better quality choice. Its 100 mg 5-HTP serving is more substantial than the original’s 50 mg amount. The same serious interaction caution with serotonin-raising medicines applies.
83 Performance

5-HTP Enhanced with Vitamins B6 and C

Doctor's Best
A more focused formula and stronger disclosed ingredient profile make this a better quality choice. Its 100 mg 5-HTP serving is more substantial than the original’s 50 mg amount. The same serious interaction caution with serotonin-raising medicines applies.
84 Budget

5-HTP 50 mg

NOW
The lower recurring cost makes this a more economical eligible choice. Its 50 mg 5-HTP serving matches the original amount while offering a different formula or package choice. The same serious interaction caution with serotonin-raising medicines applies.
85 Budget

5-HTP 100 mg

Doctor's Best
The lower recurring cost makes this a more economical eligible choice. Its 100 mg 5-HTP serving is more substantial than the original’s 50 mg amount. The same serious interaction caution with serotonin-raising medicines applies.
82 Budget

5-HTP 50 mg

Swanson Premium Brand
The lower recurring cost makes this a more economical eligible choice. Its 50 mg 5-HTP serving matches the original amount while offering a different formula or package choice. The same serious interaction caution with serotonin-raising medicines applies.
83 Value

5-HTP 200mg

Best Naturals
Focused 5-HTP dosing and a lower recurring cost create a favorable quality-to-cost balance. A Griffonia source is identified, but active standardization remains incomplete. The same serious interaction caution with serotonin-raising medicines applies.
83 Value

5-HTP with Vitamin B6 & Vitamin C

Lake Avenue Nutrition
Focused 5-HTP dosing and a lower recurring cost create a favorable quality-to-cost balance. The active amount is disclosed, but botanical-source detail remains incomplete. The same serious interaction caution with serotonin-raising medicines applies.
82 Value

5-HTP 200 mg Maximum Strength

Swanson
Focused 5-HTP dosing and a lower recurring cost create a favorable quality-to-cost balance. A Griffonia source is identified, but active standardization remains incomplete. The same serious interaction caution with serotonin-raising medicines applies.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. The impact of 5-hydroxytryptophan supplementation on sleep quality and gut microbiota composition in older adults: A randomized controlled trial.
    Sutanto CN; Xia X; Heng CW; Tan YS; Lee DPS; Fam J; Kim JE · Clinical nutrition (Edinburgh, Scotland) · 2024
    Randomized trial30 participantsSleep Support for5-HTP
  2. Effect of a serotonin precursor and uptake inhibitor in anxiety disorders; a double-blind comparison of 5-hydroxytryptophan, clomipramine and placebo.
    Kahn RS; Westenberg HG; Verhoeven WM; Gispen-de Wied CC; Kamerbeek WD · International clinical psychopharmacology · 1987
    Randomized trial45 participantsStress Relief for5-HTP
  3. Acute L-5-hydroxytryptophan administration inhibits carbon dioxide-induced panic in panic disorder patients.
    Schruers K; van Diest R; Overbeek T; Griez E · Psychiatry research · 2003
    Randomized trial48 participantsStress Relief for5-HTP
  4. An open-label trial of L-5-hydroxytryptophan in subjects with romantic stress.
    Emanuele E; Bertona M; Minoretti P; Geroldi D · Neuro endocrinology letters · 2011
    Single-arm trial15 participantsStress Relief for5-HTP
  5. Sex-linked differences in cortisol, ACTH and prolactin responses to 5-hydroxy-tryptophan in healthy controls and minor and major depressed patients.
    Maes M; Vandewoude M; Schotte C; Maes L; Martin M; Blockx P · Acta psychiatrica Scandinavica · 1990
    Clinical trial120 participantsStress Relief for5-HTP
  6. Early pharmacological interventions for universal prevention of post-traumatic stress disorder (PTSD).
    Bertolini F; Robertson L; Bisson JI; Meader N; Churchill R; Ostuzzi G; Stein DJ; Williams T; Barbui C · The Cochrane database of systematic reviews · 2022
    Systematic review2,023 participants13 studies pooledStress Relief for5-HTP
  7. Pharmacology of rising oral doses of 5-hydroxytryptophan with carbidopa.
    Smarius LJ; Jacobs GE; Hoeberechts-Lefrandt DH; de Kam ML; van der Post JP; de Rijk R; van Pelt J; Schoemaker RC; Zitman FG; van Gerven JM; Gijsman HJ · Journal of psychopharmacology (Oxford, England) · 2008
    Randomized trialStress Relief for5-HTP
  8. Comparative study of efficacy of l-5-hydroxytryptophan and fluoxetine in patients presenting with first depressive episode.
    Jangid P; Malik P; Singh P; Sharma M; Gulia AK · Asian journal of psychiatry · 2013
    Randomized trial70 participantsMood Support for5-HTP
  9. Effects of 5-hydroxytryptophan on distinct types of depression: a systematic review and meta-analysis.
    Javelle F; Lampit A; Bloch W; Häussermann P; Johnson SL; Zimmer P · Nutrition reviews · 2020
    Meta-analysis13 studies pooledMood Support for5-HTP
  10. The Impact of 5-Hydroxytryptophan Supplementation on Cognitive Function and Mood in Singapore Older Adults: A Randomized Controlled Trial.
    Li S; Sutanto CN; Xia X; Kim JE · Nutrients · 2025
    Randomized trial30 participantsMood Support for5-HTP
  11. Effect of 5-Hydroxytryptophan on Fatigue in Quiescent Inflammatory Bowel Disease: A Randomized Controlled Trial.
    Truyens M; Lobatón T; Ferrante M; Bossuyt P; Vermeire S; Pouillon L; Dewint P; Cremer A; Peeters H; Lambrecht G; Louis E; Rahier JF; Dewit O; Muls V; Holvoet T; Vandermeulen L; Peeters A; Gonzales GB; Bos S; Laukens D; De Vos M · Gastroenterology · 2022
    Randomized trial166 participantsMood Support for5-HTP
  12. Tryptophan and 5-hydroxytryptophan for depression.
    Shaw K; Turner J; Del Mar C · The Cochrane database of systematic reviews · 2002
    Systematic review64 participants2 studies pooledMood Support for5-HTP
  13. 5-Hydroxytryptophan (5-HTP) and a MAOI (nialamide) in the treatment of depressions. A double-blind controlled study.
    Aliño JJ; Gutierrez JL; Iglesias ML · International pharmacopsychiatry · 1976
    Non-randomized trial30 participantsMood Support for5-HTP
  14. Enhanced tolerability of the 5-hydroxytryptophane challenge test combined with granisetron.
    Jacobs GE; Kamerling IM; de Kam ML; Derijk RH; van Pelt J; Zitman FG; van Gerven JM · Journal of psychopharmacology (Oxford, England) · 2010
    Randomized trialStress Relief for5-HTP