Other name(s):

a-amino-b-[p-hydroxyphenyl]-propionic acid

Unsubstantiated claims

Please note that this section reports on claims that have not yet been through scientific studies.

Tyrosine is said to improve mood. It may help treat depression, anxiety, narcolepsy, and insomnia.

Tyrosine may help suppress appetite and reduce body fat. It may also prompt the release of human growth hormone (HGH).

It’s also been used to treat some allergies.

Recommended intake

Amino acids (AAs) are available as individual AAs or in AA combinations. They also come as part of multi-vitamins, proteins, and food supplements. The forms include tablets, fluids, and powders.

Note that by eating enough protein in your diet, you get all of the amino acids you need.

People with phenylketonuria (PKU) may need to take tyrosine supplements since. This is because they’re unable to convert phenylalanine into tyrosine. 

Side effects, toxicity, and interactions

Using a single amino acid supplement may lead to negative nitrogen balance. This can decrease how efficient your metabolism is. It can also make your kidneys work harder. In children, taking single amino acid supplements may also cause growth problems.

You should not take high doses of individual amino acids for long periods of time.

Women who are pregnant or breastfeeding shouldn’t use tyrosine supplements.

People who have melanoma (pigmented type) or tyrosinemia type I or II shouldn’t take tyrosine supplements.

People with overactive thyroid (hyperthyroidism) should talk with their healthcare providers before taking tyrosine supplements. 

You shouldn’t take tyrosine with monoamine oxidase inhibitors (MAOIs). These are a type of medicine used to treat depression.