Psyllium shampoo generally does not make gray hair black. Psyllium, is mainly used for the treatment of dysuria (unsmooth urination), gonorrhea (cloudy urine and leukorrhea), epistaxis, blood in urine, eye redness and swelling, sore throat, jaundice, edema, diarrhea, and so on. Clinical drugs commonly used in the treatment of gray hair include Wuha Pills, Tianma Shouwu Tablets, etc., but the specific medication needs to be decided by the doctor according to the patient’s condition. If the gray hair caused by old age and physical decline, generally do not need special treatment. The adverse reactions and contraindications of Plantago Ovata are not clear, if used together with other drugs may occur drug interactions, please consult your physician or pharmacist for details. It should be noted that taking the above medications requires medical supervision.