Source Naturals L-Phenylalanine, Free Form Essential Amino Acid - 500mg, 100 Vegan Tablets

Why Choose Source Naturals L-Phenylalanine?

For over 40 years, Source Naturals has been a trusted name in supplements, committed to quality and science-backed nutrition. This L-Phenylalanine supplement continues that tradition, offering 500mg of free form amino acid per vegan tablet. Ideal for those seeking to support neurotransmitter function and maintain adequate amino acid levels.*

• Free Form Amino Acid: Already in its simplest structure for efficient absorption.
• Vegan Tablets: No animal-derived ingredients, suitable for plant-based lifestyles.
• 500mg Potency: A convenient dosage easily incorporated into daily routines.
• cGMP Certified: Produced under strict quality standards to ensure purity and potency.

What Is L-Phenylalanine?

L-Phenylalanine is an essential amino acid that your body cannot produce on its own; it must come from diet or supplementation. It's found naturally in protein-rich foods like meat, fish, eggs, dairy, and certain plant sources. This free form supplement provides L-Phenylalanine in its pure, ready-to-absorb state, making it a simple way to fill dietary gaps.

How Does L-Phenylalanine Work in the Body?

Once ingested, L-Phenylalanine is converted to tyrosine, which then becomes L-dopa and eventually dopamine, norepinephrine, and adrenaline—key neurotransmitters involved in mood, focussed, and stress response.* It is also a direct precursor to phenylethylamine (PEA), a compound that may play a role in alertness and attention.* These natural biochemical pathways rely on adequate L-Phenylalanine levels.

Suggested Use and Considerations

Take 1 to 2 tablets daily, either with or without food. For optimal absorption, consider taking between meals. Do not exceed the recommended dose unless advised by a healthcare professional. Store in a cool, dry place and keep out of reach of children. Always read the label and follow directions for use.

Who Might Benefit from L-Phenylalanine Supplementation?

While most people get enough from a balanced diet, some may benefit from supplementation:

• Vegans and Vegetarians: Plant-based diets can be lower in certain amino acids; a free form supplement helps ensure adequate intake.
• Individuals with Dietary Restrictions: Those with limited protein sources or allergies may find a targeted amino acid helpful.
• Active Lifestyles: Athletes or those under physical stress may have increased needs for amino acids to support recovery and neurotransmitter balance.*

Note: L-Phenylalanine is contraindicated for individuals with phenylketonuria (PKU). If you have PKU or are pregnant or nursing, consult your healthcare provider before use.

FAQs About L-Phenylalanine

Is L-Phenylalanine the same as DL-Phenylalanine?

No. L-Phenylalanine is the natural form found in foods and used by the body. DL-Phenylalanine is a synthetic mixture that includes the D-form, which may have different effects. This product contains only the L-form.

Can I take this on an empty stomach?

Yes, free form amino acids are generally absorbed well on an empty stomach. If any discomfort occurs, try taking it with a meal.

Is this product safe for long-term use?

When used as directed, L-Phenylalanine is considered safe for most people. As with any supplement, periodic breaks or cycling can be discussed with your healthcare provider.

Quality and Manufacturing

Source Naturals adheres to strict quality standards. This product is manufactured in the USA under current Good Manufacturing Practices (cGMPs). Each batch is tested for purity and potency to ensure a consistent, reliable supplement. With over four decades of experience, Source Naturals remains dedicated to ingredient quality and consumer trust.

*These statements have not been evaluated by the Therapeutic Goods Administration. This product is not intended to diagnose, treat, or prevent any disease.