L-tyrosine

L-tyrosine is a non-essential amino acid and a precursor to several important neurotransmitters, including dopamine, norepinephrine, and epinephrine. It is vital for the production of melanin, the pigment responsible for hair and skin color, and is involved in the synthesis of thyroid hormones.

Indications

L-tyrosine is used as a dietary supplement to support mental alertness, cognitive function, and physical performance. It is also indicated for individuals with conditions that lead to low levels of this amino acid, such as phenylketonuria (PKU).

Dosage

-Adults: The typical dosage ranges from 500 mg to 2,000 mg per day, divided into two or three doses. It is recommended to take L-tyrosine on an empty stomach to enhance absorption. -Children: Dosage should be determined by a healthcare provider based on the child's age, weight, and medical condition.

Contra-Indications

-Hypersensitivity to L-tyrosine or any of its components. -Hyperthyroidism or Graves' disease, as L-tyrosine can potentially exacerbate symptoms by increasing thyroid hormone production.

Special Precautions

-Patients with a history of melanoma should avoid L-tyrosine supplementation due to its role in melanin production. -Individuals with thyroid disorders should use L-tyrosine with caution and under medical supervision. -Pregnant or breastfeeding women should consult a healthcare provider before using L-tyrosine supplements

Side Effects

-Nausea -Headache -Fatigue -Heartburn -Joint pain (rare)

Drug Interactions

-Monoamine oxidase inhibitors (MAOIs): Concurrent use can increase the risk of hypertensive crisis. -Thyroid medications: L-tyrosine may enhance the effects of thyroid hormone replacement therapy, requiring dosage adjustments. -Levodopa: L-tyrosine may interfere with the effectiveness of this medication used in Parkinson's disease treatment.