L-Tryptophan 1000 mg

L-Tryptophan 1000 mg

AN Amazing Nutrition Amazing Formulas4.7 (613 ratings)
Format:Tablet Quantity: 60 Tablet(s) · 60 servings
Goals
$12.98 $0.21 per serving
iHerbLowest$12.98Vitacost$13.89

Product analysis

46 out of 100

L-Tryptophan 1000 mg offers a focused option that may help with falling asleep through its role in making sleep-related body chemicals. Its preparation is unspecified, making comparison with other tryptophan options harder.

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

Nutrient Quality20

The tryptophan form is not disclosed. The exact preparation and its quality are therefore unclear.

Ingredient Transparency63

The amount is clearly stated, but the form is not. You can compare serving quantities more easily than the exact preparation.

Value For Money40

Value for the tryptophan serving cannot be reliably established. That uncertainty does not show either good or poor value.

Customer Satisfaction78

Customer feedback is very positive across several hundred ratings. The review base supports confidence in satisfaction without proving an effect on sleep or stress.

Product Focus55

One active ingredient keeps the supplement focused. Its possible sleep-onset and mood connections are limited, with dependable everyday stress relief still uncertain.

Format
Tablet
Container
60 Tablet(s)
Per serving
$0.21
Customer rating
4.7 · 613 ratings
Report analysis

Goals

Sleep Support
Sleep Support
Impact
Moderate effect
A+ Ingredient FitD+ PathwaysD+ EvidenceA+ Formulation Logic
Study evidence
Stress Relief
Stress Relief
Impact
High effect
A+ Ingredient FitD+ PathwaysC+ EvidenceA+ Formulation Logic
Tryptophan · 1000 mg
Study evidence
Mood Support
Mood Support
Impact
Lower effect
A+ Ingredient FitF PathwaysF EvidenceA+ Formulation Logic
Study evidence

Ingredients

IngredientAmount per servingScore
L-Tryptophan
1000 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free
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. The supplied analysis indicates a stronger formulation than the original, without relying on an exact price comparison.
83 Performance

L-Tryptophan 500 mg

Swanson
The standalone L-form avoids competing amino acids, but source-grade details are not supplied. The supplied analysis indicates a stronger formulation than the original, without relying on an exact price comparison.
82 Performance

L-Tryptophan Powder

NOW
The standalone powder avoids competing amino acids and allows flexible measuring. The supplied analysis indicates a stronger formulation than the original, without relying on an exact price comparison.
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. Fewer than three eligible products are truly cheaper, so this is a closest-cost fallback rather than a genuine cheaper alternative.
85 Budget

L-Tryptophan 500 mg

Doctor's Best
Branded TryptoPure provides useful source-quality differentiation. 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 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.
82 Value

Sleep Nighttime Powder

youtheory
Glycine, L-theanine, magnesium citrate, tryptophan, 5-HTP, and low-dose melatonin create a well-dosed nighttime formula. 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