Revgrey Solution is formulated to treat premature greying of scalp hair; however, it is not specifically designed or tested for use on facial hair, such as the beard. Since the skin on the face is more sensitive than the scalp, applying products not intended for facial use may increase the risk of irritation, allergic reactions, or other skin issues. Additionally, beard hair differs in texture and growth patterns, which may affect how the product works. For best results and safety, especially if you have sensitive or acne-prone skin, it is advisable to consult a dermatologist before using Revgrey Solution on the beard.