Source Naturals
L-Tryptophan
72/100
SUPPIE SCORE
75/100
EFFICACY
Medium
SAFETY
82/100
CLEANLINESS
What Does L-Tryptophan Do?
Source Naturals L-Tryptophan provides a solid 500 mg dose supported by studies for sleep and mood benefits, with good bioavailability. Overall safe for adults, but medium risk due to serotonin interactions and historical EMS concerns; consult doctor for long-term use.
What are the evidence-based benefits of L-Tryptophan for sleep support?
How does L-Tryptophan dosage in this product compare to research recommendations?
Are there any known interactions between L-Tryptophan and antidepressants?
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What Are the Benefits of L-Tryptophan?
Based on proven scientific research
Sleep SupportStrong
Mood EnhancementModerate
Anxiety ReductionModerate
Serotonin PrecursorStrong
Good For:
What Are the Side Effects of Source Naturals L-Tryptophan?
Always consult your health practitioner if in doubt.
RiskMedium Risk
Overview
•L-Tryptophan at 500 mg is within safe daily limits (up to 5g) for short-term use, but long-term safety data is limited post-1989 eosinophilia-myalgia syndrome (EMS) outbreak linked to contaminated batches.
•Potential mild side effects include nausea, headache, or drowsiness; rare EMS risk is low with current manufacturing standards but monitor for muscle pain or rash.
•Significant interaction risk with SSRIs, SNRIs, or MAOIs, potentially causing serotonin syndrome; consult physician if on antidepressants.
•Not recommended during pregnancy or breastfeeding due to insufficient safety data; avoid in children under 12 without medical advice.
•No major allergens in this formulation, but those with phenylketonuria should avoid due to potential trace impurities; generally low contamination risk from reputable brand.
Potential Side Effects
Negative Interactions
Allergens
None declared
Inactive Ingredients
Microcrystalline cellulose
Low RiskStearic acid
Low RiskMagnesium stearate
Low RiskModified cellulose gum
Low RiskSilica
Low RiskWhat Are the Ingredients in Source Naturals L-Tryptophan?
L-Tryptophan
500 mg
Microcrystalline Cellulose
Stearic Acid
Magnesium Stearate
Modified Cellulose Gum
Silica
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Dosage & Bioavailability
How the active doses and forms in L-Tryptophan compare to the research.
•L-Tryptophan — 500 mg per serving; within the 500 mg/day used in studies.
Sources & References
Frequently Asked Questions
Common questions about Source Naturals L-Tryptophan