Source Naturals L-Tyrosine, 500 mg, 100 Tablets

Source Naturals L-Tyrosine provides 500 mg of this free-form amino acid per tablet, formulated to support cognitive function and mood balance by acting as a building block for neurotransmitters like dopamine and norepinephrine. The manufacturer notes it may also help ease physical discomfort levels and serves as a precursor for thyroid hormones and melanin.

This product uses L-tyrosine in its free-form state, which the manufacturer states can rapidly cross the blood-brain barrier. The tablets contain dibasic calcium phosphate as a calcium source, providing 110 mg of calcium per serving alongside the amino acid. According to the manufacturer, all ingredients undergo extensive testing using analytical methods like HPLC and LC-MS at their cGMP-certified facility in Scotts Valley, California.

Available in 100-tablet bottles, this formulation contains no sugar, starch, preservatives, or artificial colors, flavors, or fragrances. The manufacturer recommends one tablet daily and notes it should not be used with MAO inhibitor drugs.