L-Tryptophan 500 mg

L-Tryptophan 500 mg

Doctor's Best4.5 (2,175 ratings)
Format:Capsule Quantity: 90 Veggie Cap(s) · 90 servings
Goals
$19.99 $0.22 per serving
iHerbLowest$19.99Amazon$19.99Pure Formulas$20.58Vitacost$21.99

Product analysis

60 out of 100

L-Tryptophan 500 mg may offer limited help with falling asleep, though improvement in broader sleep quality remains uncertain.

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

Nutrient Quality40

The label names the tryptophan preparation as TryptoPure. The name alone does not establish an absorption advantage or stronger benefits.

Ingredient Transparency100

The applicable amounts and forms are disclosed, making the ingredients easier to compare.

Value For Money40

There is not enough reliable cost information to assess the tryptophan's value. The stated serving amount alone does not show whether it is economical.

Customer Satisfaction82

Customer ratings are favorable across thousands of reviews. The feedback describes satisfaction and does not prove effectiveness or safety.

Product Focus55

The clearest potential contribution is limited help with falling asleep. Direct relief from everyday psychological stress and broader sleep-quality benefits remain unestablished.

Format
Capsule
Container
90 Veggie Cap(s)
Per serving
$0.22
Customer rating
4.5 · 2,175 ratings
Report analysis

Goals

Stress Relief
Stress Relief
Impact
High effect
B Ingredient FitF PathwaysC+ EvidenceA+ Formulation Logic
Tryptophan · 500 mg
Study evidence
Sleep Support
Sleep Support
Impact
Moderate effect
B Ingredient FitF PathwaysD+ EvidenceA+ Formulation Logic
Study evidence
Mood Support
Mood Support
Impact
Lower effect
B Ingredient FitF PathwaysF EvidenceA+ Formulation Logic
Study evidence

Ingredients

IngredientAmount per servingScore
L-Tryptophan (TryptoPure)
 500 mg
Gluten Free Adults 18–50 Vegan Vegetarian
Report overview
84 Performance

L-Tryptophan 500 mg

Life Extension
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. No unused eligible choice offers a clear across-the-board quality gain, so this represents a formulation trade-off rather than a definite upgrade.
82 Performance

L-Tryptophan Powder

NOW
The standalone powder avoids competing amino acids and allows flexible measuring. No unused eligible choice offers a clear across-the-board quality gain, so this represents a formulation trade-off rather than a definite upgrade.
82 Performance

Sleep Nighttime Powder

youtheory
Glycine, L-theanine, magnesium citrate, tryptophan, 5-HTP, and low-dose melatonin create a well-dosed nighttime formula. No unused eligible choice offers a clear across-the-board quality gain, so this represents a formulation trade-off rather than a definite upgrade.
83 Budget

L-Tryptophan 1000 mg

AN Amazing Nutrition Amazing Formulas
The standalone L-form is appropriate, though a tablet is a less flexible delivery format. Its supplied serving cost is lower than the original’s, while the tryptophan-focused formula remains relevant.
83 Budget

L-Tryptophan 500 mg

Jarrow Formulas
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. Its supplied serving cost is lower than the original’s, while the tryptophan-focused formula remains relevant.
83 Budget

L-Tryptophan 500 mg

Swanson
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. Fewer than three eligible products are truly cheaper, so this is a closest-cost fallback rather than a genuine cheaper alternative.
82 Value

L-Tryptophan 1000 mg

AN Amazing Nutrition Amazing Formulas
The standalone L-form is appropriate, though a tablet is a less flexible delivery format. Its formulation quality and lower supplied serving cost create a favorable value balance versus the original.
82 Value

L-Tryptophan 500 mg

Swanson Ultra
Branded TryptoPure provides useful source-quality differentiation. Its formulation quality may justify the higher supplied serving cost, though the value advantage depends on prioritizing the ingredient profile.
78 Value

L-Tryptophan 500 mg

Advanced Nutrition by Zahler
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. Its formulation quality may justify the higher supplied serving cost, though the value advantage depends on prioritizing the ingredient profile.
Report alternatives

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