✓ L-Tyrosine is an amino acid essential for maintaining proper brain function, also contributing to mood and mental alertness. L-Tyrosine is necessary for the synthesis of thyroid hormone and epinephrine (adrenaline), L-Tyrosine supports healthy glandular function and stress response. ✓ High BIOAVAILABILTY PURITY AND POTENCY. Premium ingredients ensure that we are able to guarantee you the highest bioavailability to ensure maximum absorption. ✓ LETTERBOX FRIENDLY Environmentally friendly minimalist slimline packaging which slips directly through your letterbox. No waiting in or visits to the post office. ✓ INGREDIENT TRACABILITY AND PROVIDENCE Supplement manufactured in the UK under GMP (Good Manufacturing Practice) under License in an ISO accredited facility. ✓ Manufactured using high quality PHARMACEUTICAL GRADE ingredients.