What is it? Overview Usage Side Effects and Warnings

What is Tyrosine?

Tyrosine is an amino acid found in meat proteins. Your body uses it as a starting material to make several neurotransmitters (chemicals that help the brain and nervous system function). Based on this fact, tyrosine has been proposed as a treatment for various conditions in which mental function is impaired or slowed down, such as fatigue and depression. It has also been tried for attention deficit disorder (ADD).

Preliminary evidence, including small, double-blind trials, suggests that tyrosine supplements may help fight fatigue and improve memory and mental function in people who are deprived of sleep or exposed to other forms of stress . 1 Based on the findings, mentioned in the above paragraph, it has been inferred that tyrosine might enhance alertness in people suffering from jet lag , but this has not been studied directly.

Tyrosine may also provide some temporary benefit for attention deficit disorder (ADD) , but the benefits appear to wear off in a couple of weeks. 2 Tyrosine is said to work better for this purpose when it is combined in an "amino acid cocktail" along with gamma-aminobutyric acid (GABA), phenylalanine , and glutamine ; however, there is no scientific...

Safety Issues

Tyrosine seems to be generally safe, though at high dosages some people have reported nausea, diarrhea, vomiting, or nervousness. As with any other supplement taken in multigram doses, it is important to use a high-quality product; even a very small percentage of contaminant in the product might add up to a dangerous amount.

Maximum safe dosages for young children, women who are pregnant or nursing, or those with severe liver or kidney disease have not been established.