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Tyrosine Side Effects

Although it is a "natural" product, side effects of tyrosine are still possible. Only a few small studies have been done on tyrosine. Based on these studies, the most common side effects include headaches, fatigue, and nausea. However, potentially serious side effects can also occur. Contact your healthcare provider if you have trouble breathing, an unexplained rash, or a worsening of hyperthyroidism symptoms.

Does Tyrosine Cause Side Effects?

As with any medication or supplement, side effects are possible with tyrosine (sometimes known as L-tyrosine). Many people assume that natural products such as tyrosine are always free of side effects. However, this is simply not the case. It is reasonable to assume that any supplement potent enough to have medicinal properties may also have side effects.
 

Reported Side Effects of Tyrosine

In general, reported tyrosine side effects are fairly minor. Some of these reported side effects include:
 
However, many of these "side effects" are commonly reported with all medications or supplements, probably because such "side effects" are common in all people, whether or not they are taking any medications or supplements. Due to the small size of most studies, it is not possible to know if these are true side effects of tyrosine or not.
 

Side Effects to Report

Some tyrosine side effects, while occurring infrequently, are potentially serious and should be reported immediately to your healthcare provider. These include but are not limited to:
 
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