Product Review
Get a nutritional boost with Swanson DL- Phenylalanine (DLPA)! A great source of amino acid precursors for neurotransmitters that support brain health, DL-Phenylalanine is an essential amino acid that cannot be made in the body and must be supplied by food.
- How potent is this L-Theanine? This is a double-potency L-theanine supplement delivering 200 mg per capsule of patented Suntheanine for enhanced calming support.
- Does this accelerate wellbeing? Yes — this supplement accelerates balanced wellbeing, helping you maintain calm focus throughout your day.
- How is this supplement made? For over 5 decades, Swanson has delivered science-backed health products worldwide. Each wellness supplement is made in our GMP-certified facilities, and our purity and potency testing includes independent third-party labs.
- What is the shelf life? Per GMP guidelines, most products are formulated for 24 months from the date of manufacture. Liquids and probiotics are formulated for 12 months.
- Can I trust the quality? Yes — Swanson is a name you can rely on — our products are manufactured to the highest standards, ensuring you get trusted quality, every time.
