Lamberts® L-Tyrosine is presented as a free-form amino acid for maximum absorption. Each capsule provides a full 500mg of L-Tyrosine. Amino acids are classified as either essential or non-essential. Essential amino acids cannot be synthesised in the body and must be obtained from the diet, whereas non-essential amino acids, whilst still essential for health, can be synthesised in the body and are therefore not classified as 'essential'. Tyrosine is considered a non-essential amino acid because the body can make it from phenylalanine but it is also obtained from high protein foods such as cheese, chicken, fish and soya. Daily Intake: 1- 4 capsules