Professional Formulas L-Tyrosine is a homeopathic formula offering support for elevating mood, cellular development, and cellular maintenance. For the temporary relief of fatigue, sadness, diminished memory, anxiousness, difficulty focusing, general weakness, apathy, mood swings, or irritability. Recommended Use: Place drops under tongue 30 minutes before/after meals. Adults and children 12 years and over: Take 10 drops up to 3 times per day. Consult a physician for use in children under 12 years of age.