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Optimized Tryptophan Plus

Life Extension
4.7
★ ★ ★ ★ ★
(1570 ratings)
Tryptophan 1000 mg
Niacin 66 mg
Lysine 250 mg
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Score65
A substantial tryptophan dose is useful for sleep and mood support, but the hidden blend and three-capsule serving reduce transparency and value.
How scoring works
Quantity:90 Capsule(s) • (30 servings)
Goals:
Stress Relief
Mood Support
Sleep Support

Score 65

A substantial tryptophan dose is useful for sleep and mood support, but the hidden blend and three-capsule serving reduce transparency and value.
How scoring works
$24.00($0.80 per serving)
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Analysis

One gram of L-tryptophan is a substantial core amount for serotonin and melatonin precursor support. Niacinamide is included as a related cofactor, while lysine adds a separate amino-acid component.

The 285 mg proprietary blend is the central quality limitation because its ingredient amounts cannot be evaluated individually. That lack of detail makes it harder to judge whether the added components meaningfully support the main tryptophan dose.

Three capsules per serving may be acceptable for bedtime use, but the serving burden and value are only moderate. Tryptophan also has important serotonergic interactions and can cause sedation, so the intended timing and medication context matter.

Who is it for
  • Adults seeking tryptophan-centered sleep support
  • People who prefer capsules over powder
Best for
  • Bedtime tryptophan supplementation
  • Serotonin and melatonin precursor support

Pros

  • Provides 1,000 mg of L-tryptophan
  • Includes niacinamide and lysine
  • Clearly discloses the main tryptophan amount

Cons

  • Uses an undisclosed 285 mg proprietary blend
  • Requires three capsules per serving
  • Serving value is only moderate

Warnings

  • Do not combine tryptophan with SSRIs, SNRIs, MAO inhibitors, tramadol, or other serotonin-raising agents without professional guidance
  • Tryptophan may cause drowsiness, so avoid driving until its effects are known
  • The one-gram tryptophan amount may cause nausea or digestive discomfort in sensitive users

Nutrient quality

76 High impact

Tryptophan and lysine use clear forms, while niacin is identified as niacinamide. The tryptophan amount is meaningful and the lysine amount is supportive.

Ingredient transparency

54 Moderate impact

The main actives have amounts, but the components inside the proprietary blend do not. Inactive capsule ingredients are not disclosed in the supplied information.

Customer satisfaction

71 High impact

The supplied average and volume indicate strong aggregate satisfaction. No detailed experience reports are available to identify repeated complaints or confirm perceived benefits.

Value for money

61 Moderate impact

The meaningful tryptophan dose partly supports the cost, though the hidden blend weakens confidence. The serving cost is relatively high for a partly undisclosed formula.

Report analysis

Goals

Stress Relief
Impact
High effect
B+ Goal FitB Strength of SupportC CoverageC Formula Quality
Tryptophan · 1000 mg

A substantial L-tryptophan amount directly supports serotonin production, while niacin and lysine provide secondary metabolic context. The disclosed main active gives the formula meaningful depth.

An unnamed proprietary botanical blend prevents a full dose and safety assessment. L-tryptophan may dangerously add to serotonin-raising medicines such as SSRIs or MAO inhibitors.

Study evidence
Mood Support
Impact
High effect
B Goal FitB Strength of SupportC CoverageC+ Formula Quality

L-tryptophan directly supports serotonin synthesis at a substantial amount. Niacin and lysine offer limited complementary support, while the proprietary blend is not fully assessable.

The focused precursor dose is a clear strength, but botanical details and source purity are incomplete. It should not be combined casually with SSRIs, MAO inhibitors, or other serotonin-raising drugs because serotonin excess can be dangerous.

Study evidence
Tryptophan Mixed 1 study
Sleep Support
Impact
High effect
B Goal FitB Strength of SupportC CoverageC Formula Quality

L-tryptophan at 1,000 mg provides a substantial precursor dose for serotonin and melatonin production. Lysine and niacin sit alongside it, while a botanical blend may add calming support.

The proprietary blend hides its individual ingredients and amounts, so the broader sleep contribution cannot be verified. Tryptophan may interact with SSRIs, MAO inhibitors, and other serotonin-raising agents, increasing serotonin-toxicity risk.

Study evidence
Tryptophan Mixed 1 study

Ingredients

IngredientAmount per serving
Niacin (Niacinamide)
66 mg
L-Tryptophan
1000 mg
L-Lysine (L-Lysine Hydrochloride)
250 mg
Proprietary Tryptophan Plus Blend
285 mg
Adults 18–50
Report overview
Tryptophan · 1000 mg OverallScore72
D+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyC Value

The L-tryptophan dose reaches the preferred range, and the small supporting formula does not contain the main competing amino acids. Exact tryptophan content is disclosed, but no branded or purity-qualified source is stated and value is only moderate. L-tryptophan may add to the effects of serotonin-raising medicines such as SSRIs and could increase serotonin-toxicity risk.

Niacin (Niacinamide) · 66 mg OverallScore66
B+ Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyF Value

Niacinamide is clearly identified, but it supports the wider amino-acid formula rather than serving as a focused niacin product. Its amount is somewhat below the preferred standalone range and the capsule has no special delivery feature. The relatively high serving cost is difficult to justify for niacin, although the tryptophan and lysine may matter for the product's separate intended use.

B- Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyF Value

L-Lysine hydrochloride is used, but the 250 mg amount falls short of the preferred range for this collection. The formula primarily emphasizes tryptophan and niacin rather than lysine. Its low lysine total also makes it poor value when judged specifically as a lysine supplement.

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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. A systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
    Kikuchi AM, Tanabe A, Iwahori Y · Journal of Dietary Supplements · 2021
    Systematic review11 studies pooledMood Support forTryptophan
  2. The impact of tryptophan supplementation on sleep quality: a systematic review, meta-analysis, and meta-regression
    Clarinda N Sutanto, Wen Wei Loh, Jung Eun Kim · Nutrition Reviews · 2022
    Meta-analysis4 studies pooledSleep Support forTryptophan