L-Phenylalanine 500 mg
NOW
L-Phenylalanine 500 mg
4.5
★ ★ ★ ★ ★
(4315 ratings)
Phenylalanine 500 mg
Score 92
NOW L-Phenylalanine 500mg offers a foundational amino acid for brain health and mood support at an excellent price point, backed by a trusted brand.
Quantity: 120 Capsule(s) • (120 servings)
Goals: flag Mood Support flag Brain Health flag Mental Focus
leaderboard Score 92
NOW L-Phenylalanine 500mg offers a foundational amino acid for brain health and mood support at an excellent price point, backed by a trusted brand.
insights Analysis
This L-Phenylalanine supplement by NOW provides a standard 500mg dose of the essential amino acid, which serves as a crucial precursor to various neurotransmitters involved in mood regulation, cognitive function, and mental focus. The product benefits from NOW's strong reputation for quality and affordability, evidenced by its high review count and low price per serving. Its singular ingredient focus makes it a straightforward choice for those looking to supplement L-Phenylalanine specifically.
- Single, well-defined ingredient (L-Phenylalanine) at an effective dose.
- Reputable brand (NOW) known for quality and third-party testing.
- Excellent value with a very low price per serving ($0.05).
- High number of positive reviews (4211) indicates widespread user satisfaction.
- Only provides L-Phenylalanine, not a comprehensive blend if other synergistic nutrients are desired for brain health or complex cognitive issues.
- May not be sufficient for individuals with significant neurotransmitter imbalances without other cofactors like B vitamins or L-Tyrosine.
- Individuals with phenylketonuria (PKU) should strictly avoid L-Phenylalanine as they cannot metabolize it.
- Can interact with certain medications, especially MAOIs and some antipsychotics; consult a healthcare professional before use.
- High doses may cause anxiety, headaches, or gastrointestinal discomfort in sensitive individuals.
$6.90($0.05 per serving)
 Daily Vita | $ 6.90 | |
 Amazon | $ 10.59 | |
 Vitacost | $ 11.49 | |
| Daily Vita | $ 11.60 | |
 Pure Formulas | $ 11.89 | |
 iHerb | $ 12.24 |
Ingredients
| Ingredient | Amount per serving |
|---|---|
L-Phenylalanine | 500 mg |
Categories
This product is a pure L-Phenylalanine supplement with an appropriate and commonly recommended dosage, making it an excellent and straightforward representation within the Phenylalanine collection for its intended uses.
Goals
L-Phenylalanine is a direct precursor to neurotransmitters like dopamine and norepinephrine, which play vital roles in mood regulation. Many users and studies suggest it can positively influence emotional well-being.
As a precursor to key neurotransmitters, L-Phenylalanine supports overall brain function by contributing to neurochemical balance. It aids in the synthesis of compounds essential for healthy neural communication and cognitive processes.
By supporting the production of dopamine and norepinephrine, L-Phenylalanine can contribute to improved alertness, concentration, and sustained mental focus, aiding in tasks requiring cognitive effort.
93 Value 
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Amino:Cuts Amino-Charged Energy Drink Pina Colada
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While its total price ($18.90) is higher than the original L-Phenylalanine, this product represents a more budget-friendly option for an energy-boosting amino acid blend, offering L-Phenylalanine alongside caffeine and taurine for combined focus and vitality.
93 Value
L-Phenylalanine 500 mg
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4.7
★★★★★
(173 ratings)
As a direct competitor, this product offers a larger quantity (180 servings vs. 120) of the same 500mg L-Phenylalanine dosage. Assuming a competitive price, the increased servings per bottle provide superior long-term value for the core ingredient.
85 Value
Amino-9 Essentials Powder
NOW Sports
4.4
★★★★★
(1399 ratings)
This essential amino acid blend provides a significant dose of L-Phenylalanine (751mg) alongside other crucial EAAs at a very competitive price per serving ($0.14). It offers excellent value for broad-spectrum amino acid support, beneficial for overall health and recovery.
80 Value
Amino:Cuts Amino-Charged Energy Drink Pink Lemonade
ALLMAX
4.3
★★★★★
(3671 ratings)
While it's an energy-focused blend, this product offers a combination of L-Phenylalanine, other amino acids, and caffeine at a reasonable price for a functional beverage. It provides value for individuals seeking both an energy boost and amino acid support in one convenient form.
95 Performance
Dopamine Brain Food
NS Natural Stacks
4.5
★★★★★
(384 ratings)
This product offers a superior formulation by combining L-Phenylalanine (500mg) with L-Tyrosine and essential B vitamins (B6, B12, Folate), which are crucial cofactors for dopamine synthesis, providing a more robust and targeted approach to enhancing mood, brain health, and focus.
90 Performance
Ciltep
NS Natural Stacks
4.6
★★★★★
(514 ratings)
Ciltep provides a comprehensive nootropic blend that includes L-Phenylalanine (500mg) along with Artichoke extract, Forskolin, and Acetyl-L-Carnitine, synergistically working to enhance neuroplasticity, memory, and sustained cognitive function, offering a more advanced solution for mental performance.
88 Performance
True Focus
NOW
4.5
★★★★★
(358 ratings)
This supplement offers a synergistic blend of L-Phenylalanine (300mg) with L-Tyrosine, Ginkgo Biloba, and DMAE, targeting multiple pathways for improved mental focus, clarity, and overall brain function, making it a more comprehensive option for cognitive enhancement than a single amino acid.