Optimized Tryptophan Plus

Suggested Use

Directions: Take three (3) capsules all at once before bedtime; or one capsule on an empty stomach before each meal; or as recommended by a healthcare practitioner. Best if taken separately from protein or amino acids.

• 

  Life Extension Tryptophan Plus Capsules

  iHerb4.6(626)

  $24.00
• 

  Life Extension L- Tryptophan 500 mg 90 Capsules

  Life Extension4.7(496)

  $24.75
• 

  Optimized Tryptophan Plus

  Pure Prescriptions4.6(626)

  $32.00
• 

  Life Extension Enhanced Stress Relief 30 Capsules

  Life Extension4.6(426)

  $21.00
• 

  Tryptophan plus and Tryptophan with melatonin pack

  Naturitas

  $29.07
• 

  Tryptophan

  Sarasota IV Lounge

  $25.00
• 

  Tryptophan New

  biotikon.eu

  $20.38Lowest
• 

  Aminoplus Tryptophan plus Kapseln

  apohealth.de5.0(2)

  $28.08

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

• The Vitamin Shoppe

  4.6 (122)

  Vitamin & supplements store

  7140 N McCormick Blvd, Lincolnwood, IL 60712

  Directions(847) 763-1230

• Rogers Park Nutrition Spot

  4.9 (83)

  Health food store

  7411 N Clark St, Chicago, IL 60626

  Directions(773) 412-9875

• Walsh Natural Health

  4.9 (27)

  Vitamin & supplements store

  2116 1/2 Central St, Evanston, IL 60201

  Directions(847) 864-1600

• Health Kick

  5.0 (203)

  Vitamin & supplements store

  5640 Dempster St, Morton Grove, IL 60053

  Directions(847) 965-4070

• Nutrition North western

  4.8 (5)

  Vitamin & supplements store

  6318 N Western Ave, Chicago, IL 60659

  Directions(773) 701-8469

• Simply Pure Rx

  4.6 (33)

  Pharmacy

  1607 Benson Ave, Evanston, IL 60201

  Directions(847) 227-8020

• Xtreme Supplements

  5.0 (85)

  Vitamin & supplements store

  1974 W Lawrence Ave, Chicago, IL 60640

  Directions(773) 293-6644

• Life Spring Health Foods

  4.9 (198)

  Vitamin & supplements store

  3178 N Clark St, Chicago, IL 60657

  Directions(773) 327-1023

• Cutting back on the essentials: Can manipulating intake of specific amino acids modulate health and lifespan?

  HM Brown-Borg, R Buffenstein - Ageing research reviews, 2017 - Elsevier

  … health- and lifespan and the mechanisms involved. Rodent diets containing either lower methionine content, or tryptophan… restricted intake of methionine and tryptophan are due to their …

  201784 citations

• Exercise training restores longevity‐associated tryptophan metabolite 3‐hydroxyanthranilic acid levels in middle‐aged adults

  N Joisten, M Reuter, F Rosenberger… - Acta …, 2025 - Wiley Online Library

  … enzymes as potential targets for healthy aging or lifespan extension, such as tryptophan 2,3-… supplementation investigated in the mouse model was more effective in lifespan extension …

  20253 citations

• L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications

  DM Richard, MA Dawes, CW Mathias… - … of Tryptophan …, 2009 - journals.sagepub.com

  … -tryptophan, particularly L-tryptophan depletion, and on clinical trials that have been conducted using L-tryptophan supplementation. … changes in healthy adults, tryptophan depletion has …

  2009967 citations

• Analysis, nutrition, and health benefits of tryptophan

  M Friedman - International Journal of Tryptophan Research, 2018 - journals.sagepub.com

  … For example, it has been reported that the dietary supplementation of tryptophan to healthy adults (n = 35) for the study period did not result in significant changes in serum cytokine …

  2018398 citations

• Harnessing Dietary Tryptophan: Bridging the Gap Between Neurobiology and Psychiatry in Depression Management

  AC Chehadi, E Pereira de Lima… - International Journal of …, 2026 - mdpi.com

  … and glial function, further linking gut health to brain plasticity and cognition [… supplementation [291,292]. By juxtaposing data from acute Trp depletion, non-plant derived supplementation…

  20265 citations

• Nutritional importance of tryptophan for improving treatment in depression and diabetes

  DJ Haleem - 2023 - academic.oup.com

  … The importance of tryptophan supplementation for … for the optimal physiological and mental functions of our body, where bioactive metabolites of tryptophan help improve human health. …

  202314 citations

Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2025-04-24. DSLD Label ID: 328618. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.