The typical dosage range of NALT is between 300 and 500 mg per day. This could be taken all at once or several times throughout the day. You may find that your body responds at even smaller dosages or you may need more, but you should not exceed 1000 mg in a single day. With something like this, it is also important to first consult with a doctor about their recommendations for usage. You can either buy N-Acetyl L-Tyrosine supplements on their own or find it in some of the pre-formulated brain supplement products out there. L-tyrosine is included in Onnit Lab’s Alpha Brain nootropic stack at a rate of 300 mg per serving which is 150 mg per capsule.