There is no official recommended dosage for CBN, as it is not well-studied in humans. However, some experts suggest starting with a low dose of 2.5 mg and increasing gradually until you find the optimal dose for your desired effects. You should consult your doctor before using CBN, especially if you have any medical conditions or take any medications. CBN may help with anxiety by reducing stress and promoting relaxation. However, there is not enough evidence to support its effectiveness for this purpose. More research is needed to understand how CBN affects anxiety and what dosage is best.