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L-Tryptophan 500 mg

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(2175 ratings)
Tryptophan 500 mg
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Score85
500 mg of TryptoPure L-tryptophan offers a focused serotonin-precursor approach with strong value, though the formula covers only one pathway.
How scoring works
Quantity:90 Veggie Cap(s) • (90 servings)
Goals:
Stress Relief
Sleep Support
Mood Support

Score 85

500 mg of TryptoPure L-tryptophan offers a focused serotonin-precursor approach with strong value, though the formula covers only one pathway.
How scoring works
$19.99($0.22 per serving)
iHerb
$ 19.99
Amazon
$ 19.99
Vitacost
$ 21.99
Pure Formulas
$ 20.58
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Analysis

L-tryptophan supplies a precursor used in serotonin and melatonin production. The 500 mg amount is a practical starting serving in a vegetable capsule.

The TryptoPure source adds clear raw-material differentiation. Effects can vary with timing, diet, and individual metabolism.

No competing amino acids are listed, which supports focused timing away from protein-heavy meals. The formula is focused on one neurotransmitter pathway and does not provide broad sleep, stress, or mood coverage.

Who is it for
  • Adults seeking targeted sleep or mood support
  • Users starting with a moderate tryptophan amount
Best for
  • Evening or mood-support routines
  • Standalone tryptophan supplementation

Pros

  • Provides 500 mg of L-tryptophan
  • Uses branded TryptoPure material
  • Vegetable capsule format
  • Strong value

Cons

  • Premium sourcing increases cost in some sizes
  • Covers only one neurotransmitter pathway
  • Response may depend on meal timing and individual metabolism

Warnings

  • Do not combine L-tryptophan with SSRIs, SNRIs, MAO inhibitors, tramadol, triptans, or other serotonin-raising medicines without prescriber guidance.
  • Seek urgent care for agitation, confusion, heavy sweating, tremor, or a rapid heartbeat after a serotonergic combination because these can signal excessive serotonin.
  • L-tryptophan may cause drowsiness, so avoid driving or other alertness-dependent tasks until its effects are clear.

Nutrient quality

97 Highest impact

Branded TryptoPure provides useful source-quality differentiation. The tryptophan amount is substantial for targeted supplementation.

Ingredient transparency

85 Highest impact

Every listed active has an individual amount and no proprietary blend hides key doses. Daily directions and the complete inactive-ingredient list are not supplied.

Customer satisfaction

67 High impact

The supplied average is favorable and the aggregate pool is substantial. No specific feedback is provided to assess recurring complaints or whether experience matches the intended use.

Value for money

87 Highest impact

Serving cost is moderate for the disclosed active amount. Branded sourcing adds quality but does not always justify the premium.

Report analysis

Goals

Stress Relief
Impact
Highest effect
B+ Goal FitA+ Strength of SupportB- CoverageA+ Formula Quality
Tryptophan · 500 mg

TryptoPure L-tryptophan supports serotonin synthesis at a clearly disclosed 500 mg amount within the preferred targeted range. The branded source and standalone capsule provide strong quality assurance without competing amino acids.

The mechanism is most relevant to mood balance and stress-linked sleep rather than rapid daytime calming. Combining tryptophan with SSRIs, MAO inhibitors, or other serotonin-raising medicines may increase the risk of serotonin toxicity.

Study evidence
Sleep Support
Impact
Highest effect
B+ Goal FitA+ Strength of SupportC CoverageA+ Formula Quality

The 500 mg L-tryptophan amount is well aligned with the supplied dose guidance and may support production of serotonin and melatonin. Human evidence is reasonably supportive for sleep, though effects can vary with timing and dietary competition.

Branded TryptoPure and the standalone capsule provide strong source disclosure without competing amino acids. The substantial evening dose may cause drowsiness, so it should be used only when reduced alertness is acceptable.

Study evidence
Tryptophan Mixed 1 study
Mood Support
Impact
High effect
B- Goal FitB Strength of SupportD- CoverageB Formula Quality

L-tryptophan directly supplies a serotonin precursor and has credible mood relevance. The 500 mg amount is clearly disclosed from a named source.

A focused dose may help selected users, but the formula lacks vitamin B6 or another conversion cofactor. Combining tryptophan with SSRIs, MAO inhibitors, or other serotonergic agents can raise serotonin-syndrome risk.

Study evidence
Tryptophan Mixed 1 study

Ingredients

IngredientAmount per serving
L-Tryptophan (TryptoPure)
500 mg
Gluten Free Adults 18–50 Vegan Vegetarian
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value

Branded TryptoPure in a capsule provides clear source-quality differentiation and a full target amount. The standalone formula avoids amino acids that could compete with tryptophan transport, while the exact dose is easy to verify. Cost per effective amount is favorable, though not as low as the most economical tier.

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Sources

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

  1. A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
    Kikuchi AM, Tanabe A, Iwahori Y · Journal of Dietary Supplements · 2021
    Systematic review11 studies pooledMood Support forTryptophan
  2. The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression
    Clarinda N Sutanto, Wen Wei Loh, Jung Eun Kim · Nutrition Reviews · 2022
    Meta-analysis4 studies pooledSleep Support forTryptophan