Optimized Tryptophan Plus®
Botanicals with NutrientsBrand: Life Extension
Net Contents
90 Vegetarian Capsule(s)
Serving Size
3 Vegetarian Capsule(s)
Servings Per Container
30
Supplement Form
Capsule
Bar Code (UPC/SKU)
7 37870 17219 2
Product Version
QE01721C
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
5 distinct active ingredients are disclosed in Supplement Facts.
Label includes a proprietary blend, so some individual amounts are not itemized.
2 ingredients report a %DV; 1 meet or exceed 100% DV.
This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.
Supplement Facts
Serving Size: 3 Vegetarian Capsule(s) · 1 per day
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Vitamin C(Ascorbyl Palmitate) | 18 mg | 30% |
| Niacin(Niacinamide) | 66 mg | 330% |
| L-Tryptophan | 1000 mg | — |
| L-Lysine(L-Lysine Hydrochloride) | 250 mg | — |
| Proprietary Tryptophan Plus Blend | 285 mg | — |
| Perluxan Hops standardized extract | — | — |
| Ursole Rosemary standardized extract | — | — |
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Read the entire label and follow the directions carefully prior to use. Directions: Take up to 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. For maximum absorption take with a small amount of carbohydrate, such as diluted juice. Best if taken separately from protein or amino acids.
Warnings & Precautions
Precautions re: All Other
Caution: Serotonin syndrome is characterized by high levels of serotonin and symptoms like confusion, sweating, agitation, nausea, involuntary muscle contractions, and racing heartbeat. Do not take L-tryptophan if you experience these symptoms. Do not use before driving or operating heavy machinery.
Precautions re: Pregnant or Nursing or Prescription Medications
Because tryptophan may have numerous drug interactions (most commonly, MAOIs and SSRIs) consult your healthcare provider before taking this product if you are taking prescription medications.
Precautions re: Children
Warnings: - Keep out of reach of children.
Precautions re: All Other
- Do not exceed recommended dose. - Do not purchase if outer seal is broken or damaged.
Precautions re: Pregnant or Nursing or Prescription Medications
- When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.
Storage
Storage
Store tightly closed in a cool, dry place.
FDA Statements
FDA Statement of Identity
Dietary Supplement
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Other Label Statements
General Statements: All Other Content
To report a serious adverse event or obtain product information, contact 1-866-280-2852.
General Statements: All Other Content
Scan for product info
General: Product/Version Code
QE01721C
General Statements: All Other Content
Natural sleep enhancement and stress reduction
Brand IP Statement(s) re: (c), (TM), (SM)
Perluxan is used by permission. Ursole is a trademark of Vitiva d. d., Slovenia.
Manufacturer & Distributor
Distributor
Quality Supplements and Vitamins, Inc.
Ft. Lauderdale, FL, 33309
866-280-2852
Market Reference
Life Extension Tryptophan Plus Capsules
iHerb4.7(629)$24.00Life Extension L- Tryptophan 500 mg 90 Vegetarian Capsules
Life Extension4.7(505)$24.75TWO PACK Life Extension Optimized Tryptophan Plus 90 caps
eBay4.7(629)$48.00Life Extension Enhanced Stress Relief 30 Capsules
Hy-Vee4.6(432)$20.99LowestL- Tryptophan
SFI Health$43.99Life Extension L-tryptophan 500 Mg – Promotes Healthy Sleep & Satiety
eBay - vitamins-supplements4.7(505)$26.95
Where to Buy Locally
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.
Protiv Nutrition
5.0 (1)Vitamin & Supplements Shop
3rd Floor, 207 Regent St., London W1B 3HH
Optimal Health
4.3 (12)Vitamin & Supplements Shop
4 Hill Top, Redbourn, St Albans AL3 7JG
Prodentim
5.0 (1)Vitamin & Supplements Shop
72 Regent St., London W1B 4EN
GreenVits
4.2 (5)Vitamin & Supplements Shop
53A London Rd, Stanmore HA7 4PA
London Supplements
3.7 (84)Vitamin & Supplements Shop
13, Waverley Industrial Park Waverley Industrial Estate, Hailsham Dr, Harrow HA1 4TR
OP Health UK
5.0 (7)Vitamin & Supplements Shop
167-169 Great Portland St, London W1W 5PF
British Supplements
3.4 (274)Vitamin & Supplements Shop
34, New House, 67-68 Hatton Garden, London EC1N 8JY
Supplemented
4.7 (192)Vitamin & Supplements Shop
Online Retail Ltd Box 1031A, Surbiton, Kingston upon Thames KT1 9AH
Research & Studies
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 citationsExercise 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 …
20254 citationsL-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 …
2009982 citationsAnalysis, 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 …
2018401 citationsNutritional 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 citationsDual treatment with kynurenine pathway inhibitors and NAD+ precursors synergistically extends life span in Drosophila
MM Gabrawy, R Westbrook, A King, N Khosravian… - Aging …, 2024 - Wiley Online Library
… We conclude that KP flux can regulate health span and life span in Drosophila and that … blockade or NAD + precursor supplementation, we fed flies either alpha-methyl tryptophan (α-MT)…
202416 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2016-07-25. DSLD Label ID: 62824. 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.
Related Products
100% Daily Value Multi-Vitamin
Superior Source
100% Greens+Whey Chocolate
BioChem
100% Greens+Whey Chocolate
BioChem
100% Greens+Whey Vanilla
BioChem