L-Phenylalanine 500 mg

L-Phenylalanine 500 mg

NOW4.6 (4,578 ratings)
Format:Capsule Quantity: 120 Capsule(s) · 120 servings
$6.90 $0.05 per serving
Daily VitaLowest$6.90Daily Vita$11.60Amazon$11.60Pure Formulas$11.89iHerb$12.24Vitacost$13.13

Product analysis

57 out of 100

L-Phenylalanine 500 mg offers an economical way to take phenylalanine without extra active ingredients.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality20

The phenylalanine form is not identified. That limits a useful comparison of ingredient quality.

Ingredient Transparency63

The phenylalanine amount is stated, making dose comparisons easier. Its form is not identified, leaving that part of the comparison unclear.

Value For Money100

The cost is low for the phenylalanine provided. It offers an economical way to buy this ingredient, without establishing a particular health benefit.

Customer Satisfaction85

Customer ratings are very positive. Thousands of ratings provide a substantial picture of satisfaction, without demonstrating effectiveness.

Product Focus40

The formula keeps its focus on phenylalanine alone. There is not enough information to judge how well it supports a particular health goal.

Format
Capsule
Container
120 Capsule(s)
Per serving
$0.05
Customer rating
4.6 · 4,578 ratings
Report analysis

Ingredients

IngredientAmount per servingScore
L-Phenylalanine
500 mg 100
Gluten Free Adults 18–50 Vegan Dairy Free Vegetarian
Report overview
Phenylalanine · 500 mg OverallScore100
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
The serving provides 500 mg of L-Phenylalanine, at a low cost per 500 mg. It identifies L-Phenylalanine, the form used to make dopamine and norepinephrine. A PKU warning is recorded.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

It identifies L-Phenylalanine, the form used to make dopamine and norepinephrine. No competing protein or amino acids are recorded in the active ingredients.
Isomeric Form Specificity
It identifies L-Phenylalanine, the form used to make dopamine and norepinephrine.
Absorption Environment Optimization
No competing protein or amino acids are recorded in the active ingredients.

Dose, Safety & Label Transparency100

The serving provides 500 mg of phenylalanine. The amount is stated and a phenylketonuria (PKU) warning is recorded.
Phenylalanine Dosage Efficacy
The serving provides 500 mg of phenylalanine.
Transparency and Safety Warnings
The amount is stated and a phenylketonuria (PKU) warning is recorded.

Value100

The cost per 500 mg of phenylalanine is low.
Price per 500mg Active Phenylalanine
The cost per 500 mg of phenylalanine is low.
View ingredientView products
77 Performance

Ciltep

NS Natural Stacks

Active vitamin B6, a standardized artichoke extract, acetyl-L-carnitine, phenylalanine, and forskolin create a coherent nootropic stack. Compared with the original single amino acid, the added cognitive or essential-amino-acid ingredients broaden potential use, while phenylalanine remains unsuitable for people with phenylketonuria.

77 Performance

Amino Complex Berry Flavored

Thorne

A clearly disclosed essential-amino-acid profile provides useful structural nutrition, though several secondary amino acids are lightly dosed. Compared with the original single amino acid, the added cognitive or essential-amino-acid ingredients broaden potential use, while phenylalanine remains unsuitable for people with phenylketonuria.

74 Performance

True Focus

NOW

A substantial tyrosine dose and supporting phenylalanine, grape-seed extract, DMAE, and ginkgo create a plausible focus formula. Compared with the original single amino acid, the added cognitive or essential-amino-acid ingredients broaden potential use, while phenylalanine remains unsuitable for people with phenylketonuria.

60 Budget

Daily Amino Acid

21st Century

Several L-amino acids use clear forms, but DL-methionine includes an avoidable non-L isomer. No eligible candidate costs less than the original, so this is a functional fallback rather than a truly cheaper option.

66 Budget

Essential Aminos

Pure Encapsulations

The essential amino acids are clearly identified as L-isomers or stable hydrochloride forms. No eligible candidate costs less than the original, so this is a functional fallback rather than a truly cheaper option.

75 Budget

Dopamine Brain Food

NS Natural Stacks

Tyrosine, phenylalanine, trimethylglycine, and active B-vitamin forms create a focused neurotransmitter-support formula with clear doses. No eligible candidate costs less than the original, so this is a functional fallback rather than a truly cheaper option.

72 Value

Neuro Fuel

NS Natural Stacks

Pyridoxal phosphate, standardized artichoke, acetyl-L-carnitine hydrochloride, phenylalanine, and forskolin create a well-specified nootropic stack. The broader active profile may add utility beyond the original, but its higher serving cost limits the value advantage.

60 Value

Daily Amino Acid

21st Century

Several L-amino acids use clear forms, but DL-methionine includes an avoidable non-L isomer. The broader active profile may add utility beyond the original, but its higher serving cost limits the value advantage.

66 Value

Essential Aminos

Pure Encapsulations

The essential amino acids are clearly identified as L-isomers or stable hydrochloride forms. The broader active profile may add utility beyond the original, but its higher serving cost limits the value advantage.

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