L-tyrosine powder Dosage Practitioner compounding only Warnings L-Tyrosine has not been extensively tested for its effects during pregnancy Avoid use during pregnancy or lactation, unless confident that its impact can be reasonably deemed to be safe or beneficial Due to potentially impaired metabolism, caution supplementing in those taking MAOI medications When improving natural thyroid hormone production through tyrosine supplementation, any doses of exogenous Thyroxine administration may need to be adjusted Always read the label Dietary supplements should not replace a balanced diet If symptoms persist, worsen or change unexpectedly, consult your healthcare professional Formula L-tyrosine 1 g