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Optimized Tryptophan Plus

Life Extension
4.7
★ ★ ★ ★ ★
(1480 ratings)
Tryptophan 1000 mg
Niacin 66 mg
Lysine 250 mg
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Score87

A potent amino acid supplement that supports serotonin levels for better sleep and mood stability.

How scoring works
Quantity:90 Capsule(s) • (30 servings)
Goals:
Mood Support
Sleep Support
Stress Relief

Score 87

A potent amino acid supplement that supports serotonin levels for better sleep and mood stability.

How scoring works
$24.00($0.80 per serving)
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iHerb
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Analysis

Tryptophan is a direct precursor to the hormones that regulate your sleep-wake cycle and emotional balance. By providing 1,000 mg per serving, this supplement offers robust support for those looking to improve rest and manage daily stress.

The inclusion of a proprietary blend provides extra plant-based cofactors that may help with the uptake of tryptophan. It is a specialized product designed for targeted nighttime or mood-related use.

Pros

  • High 1,000 mg dose of L-Tryptophan
  • Includes Niacin to prevent tryptophan depletion
  • Capsule form is easy to digest
  • Supportive lysine for protein balance

Cons

  • Relatively expensive per serving
  • Requires taking multiple capsules
  • Not a complete multivitamin

Warnings

  • May cause drowsiness; do not drive after taking
  • Avoid use with other serotonin-modifying supplements

Nutrient quality

91 Highest impact

The combination of high-dose l-tryptophan and niacinamide targets the serotonin pathway efficiently. While the lysine dose is modest, the overall formulation synergy supports neurotransmitter metabolism effectively.

Ingredient transparency

85 Highest impact

Labeling identifies all major actives and cofactors clearly, although the use of a proprietary blend reduces total transparency for some components. Detailed dosing for the primary nutrients ensures consumers can monitor intake accurately.

Customer satisfaction

92 Highest impact

Customer feedback is strongly positive, reflecting meaningful improvements in sleep and mood for many users. The consistent rating across a large number of reviews indicates high reliability for the intended use.

Value for money

82 Highest impact

The high cost per serving is justified by the potency of the tryptophan and the complexity of the formulation. This specialized product provides higher value than single-ingredient alternatives for its targeted purpose.

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Goals

Mood Support
Impact
Highest effect
A+ Goal FitA+ Strength of SupportB CoverageA+ Formula Quality

Optimized Tryptophan Plus provides 1000 mg of L-tryptophan combined with niacinamide and lysine to support serotonin synthesis. This robust dose appears well aligned with goals for emotional stability and resilient mood.

The inclusion of niacinamide acts as a cofactor to help ensure the amino acid is directed toward the serotonin pathway. This intelligent formulation strategy maximizes the metabolic efficiency of the primary active agent.

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Sleep Support
Impact
Highest effect
A Goal FitA+ Strength of SupportC CoverageA+ Formula Quality

High-dose L-tryptophan serves as a direct precursor for the endogenous synthesis of melatonin to support sleep regulation. The inclusion of niacinamide and lysine provides complementary support for amino acid metabolism.

L-tryptophan and niacin appear well aligned with improving sleep quality and duration. A 1000mg dose provides robust support for those needing a more potent sleep-regulating aid.

View goal →
Stress Relief
Impact
Highest effect
A Goal FitA+ Strength of SupportC+ CoverageA+ Formula Quality

L-tryptophan at 1000mg provides clinical-strength support for serotonin production, which may contribute to significant improvements in mood and emotional balance. The addition of niacin and lysine appears well-aligned for supporting the natural metabolic pathways of these calming neurotransmitters.

Providing 1000mg represents a highly potent therapeutic dose that aligns with the upper range of clinical efficacy. This formulation offers deep support for the serotonin pathway and is enhanced by cofactors that ensure its efficient conversion in the body.

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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 OverallScore87
A- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyC Value
This optimized formula provides a robust 1000mg dose of Tryptophan alongside niacin and lysine to support healthy metabolism. It is a powerful option for individuals requiring higher levels of Tryptophan.
View ingredientView products
Niacin (Niacinamide) · 66 mg OverallScore74
B+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyF Value
This amino acid supplement includes niacinamide to facilitate tryptophan metabolism and support neurotransmitter synthesis. It is a targeted formula with a safe and clear niacin profile.
View ingredientView products
Lysine (L-Lysine Hydrochloride) · 250 mg OverallScore52
B+ Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyF Value
Designed for mood and sleep support, this formula includes a modest dose of lysine alongside high-potency tryptophan. It is not an ideal choice if lysine is the primary nutrient you are seeking to supplement.
View ingredientView products
93 Performance

Serotonin Brain Food

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4.7
★★★★★
(763 ratings)
High-dose L-tryptophan combined with rhodiola rosea supports healthy serotonin pathways and mental stamina under stress. Magnesium glycinate and zinc glycinate serve as essential cofactors to assist with neurotransmitter synthesis.
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92 Performance

EAA Pure Raspberry Lemonade

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90 Value

HeightFactor

Advanced Nutrition by Zahler
4.5
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A multi-nutrient approach using lysine and essential B-vitamins supports foundational growth and structural development. Botanical powders like chlorella and alfalfa provide a broad spectrum of secondary cofactors for overall wellness.
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93 Performance

Serotonin Brain Food

NS Natural Stacks
4.7
★★★★★
(763 ratings)
High-dose L-tryptophan combined with rhodiola rosea supports healthy serotonin pathways and mental stamina under stress. Magnesium glycinate and zinc glycinate serve as essential cofactors to assist with neurotransmitter synthesis.
Other sellers (0)
92 Performance

EAA Pure Raspberry Lemonade

NutraBio
4.6
★★★★★
(109 ratings)
Essential amino acids like tryptophan and lysine work alongside taurine to support cardiovascular stability and tissue integrity. The addition of AstraGin may help optimize the uptake of these nutrients within the system.
Other sellers (0)
90 Value

HeightFactor

Advanced Nutrition by Zahler
4.5
★★★★★
(2407 ratings)
A multi-nutrient approach using lysine and essential B-vitamins supports foundational growth and structural development. Botanical powders like chlorella and alfalfa provide a broad spectrum of secondary cofactors for overall wellness.
Other sellers (2)
93 Performance

Serotonin Brain Food

NS Natural Stacks
4.7
★★★★★
(763 ratings)
High-dose L-tryptophan combined with rhodiola rosea supports healthy serotonin pathways and mental stamina under stress. Magnesium glycinate and zinc glycinate serve as essential cofactors to assist with neurotransmitter synthesis.
Other sellers (0)
92 Performance

EAA Pure Raspberry Lemonade

NutraBio
4.6
★★★★★
(109 ratings)
Essential amino acids like tryptophan and lysine work alongside taurine to support cardiovascular stability and tissue integrity. The addition of AstraGin may help optimize the uptake of these nutrients within the system.
Other sellers (0)
90 Value

HeightFactor

Advanced Nutrition by Zahler
4.5
★★★★★
(2407 ratings)
A multi-nutrient approach using lysine and essential B-vitamins supports foundational growth and structural development. Botanical powders like chlorella and alfalfa provide a broad spectrum of secondary cofactors for overall wellness.
Other sellers (2)
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