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Premier Research Labs, Tyrosine Matrix, 90 Plant-Source Capsules Constipation inhibits inflammation and oxidative stressDescription Tyrosine Matrix features the conditionally essential amino acid tyrosine a precursor to thyroid hormone,epinephrine norepinephrine, and dopamine. This formula is great for those under tension needing a little help to avoid burnout. Features L Tyrosine Provides neurotransmitter support Features Tyro Synergy Support Tyrosine is a building block for neurotransmitters L Tyrosine is a conditionally essential amino acid Packaging 90 Plant Source