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Natural Factors L-Tryptophan 220 mg, 90 Vegetarian Capsules, Free Form Amino Acid, Highly Absorbable, Naturally Fermented, Vegetarian Source, Builds Lean Muscle Mass, Proudly Canadian

4.4 out of 5 stars 32 ratings
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  • ESSENTIAL AMINO ACID: L-tryptophan is one of nine essential amino acids, meaning that it cannot be synthesized by the body and must come from the diet. L-tryptophan is a pharmaceutical-grade, free-form amino acid made through a natural fermentation process.
  • BUILDS LEAN MUSCLE MASS: In addition to a healthy, balanced diet and regular resistance training, supplementing with L-tryptophan has been shown to help build lean muscle mass.
  • WORKOUT RECOVERY: L-tryptophan is a fundamental component of proteins and has numerous critical roles throughout the body, such as building and repairing muscle and other tissues.
  • FREE FORM AMINO ACID: As a free-form amino acid, L-tryptophan is more effective than the form obtained directly from food. By working to restore tryptophan levels and protect muscle integrity during strenuous exercise, L-tryptophan encourages the body to metabolize fat.
  • THIRD PARTY TESTING - ISURA VERIFIED CLEAN: The ISURA seal is your assurance that this product is independently verified as clean and safe, and has been tested for up to 800 possible contaminants. This product is ISURA verified clean, one of the highest testing standards in the world.
  • VEGAN, NON-GMO, GLUTEN FREE, FORMULATED & PACKAGED IN B.C.
  • NATURAL PRODUCT NUMBER (NPN): 80119341
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Important information

Ingredients

Each vegetarian capsule contains: Medicinal Ingredients: L-tryptophan 220 mg; Non-medicinal Ingredients: Vegetarian capsule (carbohydrate gum [cellulose], purified water), dicalcium phosphate dihydrate, vegetable grade magnesium stearate (lubricant), microcrystalline cellulose, silica, stearic acid. Allergen Statement: Contains no artificial colours, preservatives, or sweeteners; no dairy, starch, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, animal products, salt, tree nuts, or GMOs. Suitable for vegetarians/vegans. Cautions: Consult a health care practitioner prior to use if you are pregnant or breastfeeding. Keep out of the reach of children.

Directions

Recommended Adult dose: 1 capsule daily or as directed by a health care practitioner

Legal Disclaimer

Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product.

Product Description

Natural Factors NAC 600mg
Natural Factors L-Lysine 1000mg
Natural Factors L-Tyrosine 500 mg
Natural Factors L-Glutamine 1000 mg
Natural Factors L-Arginine 1000 mg
Natural Factors L-Tryptophan 220 mg
Customer Reviews
4.6 out of 5 stars 812
4.4 out of 5 stars 60
4.5 out of 5 stars 13
4.4 out of 5 stars 12
4.4 out of 5 stars 25
4.4 out of 5 stars 32
Size 180 Veg Caps 120 Tabs 120 Veg Caps 60 Veg Caps 180 Tabs 90 Veg Caps
Benefits Scavenges Free Radicals & Reduces Oxidative Stress. Aids in Respiratory Health. Helps Reduce the Recurrence, Severity, & Healing Time of Cold Sores Helps Decrease Cognitive Fatigue Resulting from Physically Stressful Situations Enhances Muscle Tissue Repair After Exercise Helps Support Healthy Heart Function Assists in the Building of Lean Muscle Mass when Combined with Regular Resistance Training
Key Ingredients NAC (N-Acetyl-L-Cysteine) L-Lysine (hydrochloride) L-Tyrosine L-Glutamine L-Arginine (hydrochloride) L-Tryptophan
Potency 600 mg 1000 mg 500 mg 1000 mg 1000 mg 220 mg
Gluten Free, Vegetarian, Non-GMO ✓ ✓ ✓ ✓ ✓ ✓
No Artificial Colours, Preservatives or Sweeteners ✓ ✓ ✓ ✓ ✓ ✓
Third Party Tested (ISURA) ✓ ✓ ✓ ✓ ✓ ✓
Canadian ✓ ✓ ✓ ✓ ✓ ✓

Product information

Technical Details

Manufacturer ‎Natural Factors
Place of Business ‎NATURAL FACTORS Coquitlam, B.C. V3K 6Y2
Item model number ‎2866
Product Dimensions ‎6.2 x 6.2 x 10.8 cm; 110 g
ASIN ‎B0CJCT4B3R

Additional Information

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Natural Factors L-Tryptophan 220 mg, 90 Vegetarian Capsules, Free Form Amino Acid, Highly Absorbable, Naturally Fermented, Vegetarian Source, Builds Lean Muscle Mass, Proudly Canadian

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Product details

  • Product Dimensions ‏ : ‎ 6.2 x 6.2 x 10.8 cm; 110 g
  • Date First Available ‏ : ‎ Sept. 15 2023
  • Manufacturer ‏ : ‎ Natural Factors
  • Place of Business ‏ : ‎ NATURAL FACTORS Coquitlam, B.C. V3K 6Y2
  • ASIN ‏ : ‎ B0CJCT4B3R
  • Item model number ‏ : ‎ 2866
  • Country of origin ‏ : ‎ Canada
  • Customer Reviews:
    4.4 out of 5 stars 32 ratings

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4.4 out of 5 stars
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  • Anne
    5.0 out of 5 stars Helps with mental energy and sleep.
    Reviewed in Canada on January 26, 2025
    Verified Purchase
    Great natural serotonin and melatonin boost.
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  • Gemma Perron
    5.0 out of 5 stars L Trrytopahane enfin dormir
    Reviewed in Canada on October 17, 2024
    Verified Purchase
    Un sommeil récupérateur et profond ! Merci la vie
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  • Spikd
    4.0 out of 5 stars Sleepy
    Reviewed in Canada on October 10, 2024
    Verified Purchase
    We need to take this product 2 hours before going to bed as it takes time to begin to work.
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  • Michelyne Bourassa
    5.0 out of 5 stars Dopamine
    Reviewed in Canada on March 29, 2024
    Verified Purchase
    Je prend de la dopamine pour essayer de dormir mais pour le moment aucun résultat positif
    One person found this helpful
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  • Curling mom
    1.0 out of 5 stars Crappy product
    Reviewed in Canada on October 25, 2024
    Verified Purchase
    If you are in need of a coma in a bottle,,,this is for you. My head felt like it wasn’t attached,,,worse than any hangover. Feel this it’s dangerous to take,,,threw them out.
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  • JohnA
    1.0 out of 5 stars No good
    Reviewed in Canada on August 4, 2024
    Verified Purchase
    No help st all, waste of money
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