Source Naturals L-Phenylalanine, Free-Form Essential Amino Acid - 500mg - 50 Vegan Tablets

L-Phenylalanine is an essential amino acid that your body cannot produce on its own. Source Naturals offers a pure, free-form tablet to help you support your mood, concentration, and overall brain function. Each 500mg tablet is vegan-friendly and designed for optimal absorption.

What Is L-Phenylalanine?

L-Phenylalanine is one of the nine essential amino acids, meaning you must obtain it from your diet or supplementation. As a free-form amino acid, it requires no further digestion, making it readily available for your body to use. Source Naturals delivers this amino acid in 500mg vegan tablets, free from common allergens and artificial additives, ensuring a clean and effective product.

How Does L-Phenylalanine Work in the Body?

Once consumed, L-Phenylalanine is converted into L-tyrosine, another amino acid, which then becomes L-dopa and eventually norepinephrine—a key neurotransmitter and hormone that helps regulate alertness, focus, and the body's response to stress.* Additionally, L-Phenylalanine serves as a direct precursor to phenylethylamine (PEA), a neurotransmitter that positively influences mood and cognitive sharpness.* By supplying the building blocks for these important signalling molecules, L-Phenylalanine plays a fundamental role in mental clarity and emotional balance.

Suggested Use and Dosage for Optimal Results

For best results, take 1 to 2 tablets daily, preferably on an empty stomach or as directed by your health care professional. Consistency is important—regular intake helps maintain steady neurotransmitter support. Each bottle contains 50 tablets, providing up to a 50-day supply at the suggested serving size.

What Makes Source Naturals L-Phenylalanine Special?

This supplement stands out for its quality and purity. Each tablet delivers 500mg of free-form L-Phenylalanine, ensuring excellent bioavailability. The formula is vegan-friendly, with no animal-derived ingredients, and is manufactured under strict Good Manufacturing Practise (GMP) standards. Source Naturals has been a trusted brand since 1982, committed to supporting optimal health through high-quality nutritional products.

Quality Assurance and Safety

Source Naturals manufactures this product in facilities that follow current Good Manufacturing Practises (GMPs), ensuring rigorous quality control from raw materials to finished product. The tablets are vegan, free from gluten, yeast, soy, and dairy, and contain no artificial colours or preservatives. As with any supplement, consult your health care provider before use, especially if you are pregnant, nursing, or taking medication.

These statements have not been evaluated by the Medicines and Health care products Regulatory Agency. This product is not intended to diagnose, treat, , or prevent any disease.