Magnetic collar is a popular health care product now. Many people wear it, but its efficacy is not supported by authoritative academic arguments. Salespeople often advocate in the media that it is hard to say whether the magnetic materials used are heavy metals and radiation. So it's best to use it with caution. If you are a patient with hypertension and cerebral infarction, it is definitely effective to insist on taking medicine, then eating and exercising, and keeping a good attitude. These are definitely more useful than magnetic rings.