Professional Formulas L-Phenylalanine High is a homeopathic formula offering support for elevating mood and suppressing appetite. For the temporary relief of minor muscle or joint pain or inflammation, sadness, irritability, restlessness, or poor concentration. 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.