Quick answer
L-tyrosine is a non-essential amino acid, meaning the body can make it from another amino acid, phenylalanine. Its name comes from the Greek word for cheese, where it was first discovered. It's found in protein foods and sold as capsules, such as MAYN L-Tyrosine 500mg.
Type
Non-essential amino acid
Made from
Phenylalanine
Name origin
Greek tyros, cheese
MAYN product
L-Tyrosine 500mg, 90 capsules
Where does the name come from?
Tyrosine was first isolated from casein, the main protein in cheese, in the 1840s. The name comes from "tyros", the Greek word for cheese. You can sometimes see tiny crunchy crystals in aged cheeses such as parmesan; some of these are tyrosine.
Tyrosine in food
| Food | Tyrosine |
|---|---|
| Parmesan and aged cheeses | High |
| Meat, poultry and fish | High |
| Soy and tofu | High |
| Eggs and dairy | Moderate |
| Nuts and seeds | Moderate |
N-acetyl L-tyrosine vs L-tyrosine
Some products use N-acetyl L-tyrosine (NALT), a modified form. Labels should state which form is used and how much is in each serve.
People taking certain medicines, including some for thyroid conditions or MAO inhibitors, should speak with their doctor before taking tyrosine.
Frequently asked questions
Are the crystals in parmesan tyrosine?
Some of the crunchy crystals in aged cheese are tyrosine; others are calcium lactate.
Is tyrosine essential?
No. The body makes tyrosine from phenylalanine.
What is NALT?
N-acetyl L-tyrosine, a modified form of tyrosine used in some supplements.
Keep reading
This article is general information only and is not medical advice. Always read the label and follow the directions for use. Dietary supplements should not replace a balanced diet. If you are pregnant, breastfeeding, taking medication or have a medical condition, speak with your doctor or pharmacist before taking a new supplement.
