L-Tryptophan by Lidtke — Ingredients, Evidence & Safety

🟢 96/100

This product looks safe

Vitamin B3: 60mg is 1.7× the Tolerable Upper Intake Level (35mg)
80% of ingredients have research evidence

C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Vitamin B3: 60mg is 1.7× the Tolerable Upper Intake Level (35mg)

Label Data

1 Capsule(s) Serving Size

40 Servings

Other Combinations Product Type

80% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C

90 mg (150% DV)

Vitamin B2

15 mg (885% DV)

📊 11.5× RDA — above typical dose 📚 12 studies (Tier A: 0, B: 1)

RDA 1.3mg This product: 15mg

Vitamin B3

60 mg (300% DV)

⚠️ Exceeds Tolerable Upper Intake Level by 1.7× (UL: 35 mg) 📚 193 studies (Tier A: 5, B: 63)

RDA 14mg This product: 60mg UL 35mg

Coenzyme Vitamin B6

10 mg (500% DV)

📊 7.7× RDA — above typical dose (UL: 100 mg) 📚 113 studies (Tier A: 3, B: 35)

RDA 1.3mg This product: 10mg UL 100mg

Magnesium

15 mg (4% DV)

📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)

This product: 15mg

Folic Acid

800 mcg (200% DV)

✅ 2.0× RDA — within safe limits 📚 225 studies (Tier A: 10, B: 105)

RDA 0.4mg This product: 0.8mg UL 1.0mg

TryptoGold

1050 mg

L-Lysine Hydrochloride

300 mg

📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)

This product: 300mg

Curcumin

150 mg

📊 Market median: 450.0mg (254 products) 📚 240 studies (Tier A: 0, B: 100)

This product: 150mg

Taurine

125 mg

📊 Market median: 500.0mg (180 products) 📚 5 studies (Tier A: 0, B: 1)

This product: 125mg

Other Ingredients

vegan Capsule

Label Claims — Verification

❓ Nutrient

❓ 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

Directions (Adults): Take one (1) to three (3) capsules or as directed by your doctor. Best if taken at bedtime or between meals. For children, consult your doctor.

⚠️ Warnings & Precautions

Caution: Keep out of reach of children.

If you are pregnant, lactating, taking any medications (especially MAOIs, Tricyclics, or SSRIs), or have a medical condition, consult your doctor.

Discontinue use if adverse reaction occurs. Do not use if seal is damaged or missing.

Toll Free: 1-800-404-8185 Adverse events may be reported above.

🧪 Formulation Notes

No added gluten, yeast, wheat, rice, corn, soy, dairy, eggs, peanuts, fish, shellfish, sugar, artificial color or artificial flavor. Non-GMO

Lidtke's naturally produced Ultra-premium L-Tryptophan

Advanced serotonin formula Supports healthy sleep & mood

Purest on the planet

Additional Information

Thank you for choosing L-Tryptophan by Lidtke. We sincerely wish the best of health for you and your family.

Lidtke stands behind each product and guarantees customer satisfaction for 365 days from the date of purchase.

Keep lid tightly closed. Keep in a cool, dry place.

As certified by the manufacturer.

Product Details

UPC / SKU 6 30610 00325 4

DSLD Entry Date 2021-12-18

Product Type Other Combinations

Form Capsule

Brand Lidtke

DSLD ID 257272

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

PubMed DOI

B Tryptophan and 5-hydroxytryptophan for depression

Systematic Review The Cochrane database of systematic reviews 2001

PubMed Cochrane

B Tryptophan and 5-hydroxytryptophan for depression

Systematic Review The Cochrane database of systematic reviews 2002

PubMed Cochrane

B The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression

Meta Analysis Nutrition reviews 2022

PubMed DOI

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

PubMed DOI

C The association between tryptophan levels and postpartum mood disorders: a systematic review and meta-analysis

Meta Analysis BMC psychiatry 2022

PubMed DOI

C A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning

Systematic Review Journal of dietary supplements 2021

PubMed DOI

C Comparison between Acupuncture and Nutraceutical Treatment with Migratens® in Patients with Fibromyalgia Syndrome: A Prospective Randomized Clinical Trial.

Rct Nutrients

PubMed DOI

C Intake of Lactiplantibacillus plantarum HEAL9 Improves Cognition in Moderately Stressed Subjects: A Randomized Controlled Study.

Rct Nutrients

PubMed DOI

C Are tryptophan and 5-hydroxytryptophan effective treatments for depression? A meta-analysis

Meta Analysis The Australian and New Zealand journal of psychiatry 2002

PubMed

View all evidence for Tryptophan →