🟢 100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • Limited research evidence available for ingredients
B Label Compliance Grade

Product Label

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Label Data

0.5 Gram(s) Serving Size
60 Servings
Amino acid/Protein Product Type
0% Evidence Coverage

Supplement Facts — Evidence Check

500 mg
📊 Market median: 500.0mg (70 products)
Median 500.0mg This product: 500mg

Other Ingredients

None

Label Claims — Verification

All Other
Structure/Function
All Other (100% of products) Structure/Function (90% of products) Nutrient (61% of products)

Target Groups

Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Suggested Use: As a dietary supplement, take 500 mg (~1/2 tsp) with 8 ounces of water or suitable beverage. Taken 1-3 times daily with meals or as directed by a qualified health professional.

⚠️ Warnings & Precautions

Warning: Keep out of the reach of children. Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions and/or taking prescription drug(s) or OTC medication(s).

Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions and/or taking prescription drug(s) or OTC medication(s).

Always consult with a qualified health physician before taking any new dietary supplement.

Do not use or consume if pressure seal is broken.

🧪 Formulation Notes

Allergens: This product contains no soy, dairy, dairy byproducts, eggs, shellfish, wheat, gluten, tree nuts, or sesame seeds.

Additional Information

Storage: Store in a cool, dry place. Re-seal zipper immediately after use to preserve freshness.

Product Details

UPC / SKU 8 18132 96780 7
DSLD Entry Date 2017-04-25
Product Type Amino acid/Protein
Form Powder
Brand Hard Rhino
DSLD ID 72443
Data Updated 2026-04-11

Research Evidence

29 Research Sources
48 Avg Quality Score
19 Rct
5 Meta Analysis
3 Systematic Review
2 Clinical Trial
B Prebiotic and probiotic supplementation and the tryptophan-kynurenine pathway: A systematic review and meta analysis
Meta Analysis Neuroscience and biobehavioral reviews 2021
B Tryptophan and 5-hydroxytryptophan for depression
Systematic Review The Cochrane database of systematic reviews 2001
B Tryptophan and 5-hydroxytryptophan for depression
Systematic Review The Cochrane database of systematic reviews 2002
B The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression
Meta Analysis Nutrition reviews 2022
B No effects of acute tryptophan depletion on anxiety or mood in weight-recovered female patients with anorexia nervosa
Rct European archives of psychiatry and clinical neuroscience 2023
C The association between tryptophan levels and postpartum mood disorders: a systematic review and meta-analysis
Meta Analysis BMC psychiatry 2022
C A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
Systematic Review Journal of dietary supplements 2021
C Comparison between Acupuncture and Nutraceutical Treatment with Migratens® in Patients with Fibromyalgia Syndrome: A Prospective Randomized Clinical Trial.
Rct Nutrients
C Intake of Lactiplantibacillus plantarum HEAL9 Improves Cognition in Moderately Stressed Subjects: A Randomized Controlled Study.
Rct Nutrients
C Are tryptophan and 5-hydroxytryptophan effective treatments for depression? A meta-analysis
Meta Analysis The Australian and New Zealand journal of psychiatry 2002
View all evidence for Tryptophan →

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