If the supply is reliable, this may be a response to improvement. I have an example here. I still have a headache after eating USANA. It hurts for a long time. Later, I went to the hospital for examination and found a tumor in my brain. Later, it was taken out in time through surgery. The doctor said that according to the size of this tumor, it is basically impossible to find out. Fortunately, USANA's cell supplement made brain lesions react, thus preventing the development and deterioration of tumors in time.
However, your headache is not necessarily a brain problem. Generally, the reaction stops within 7 days, not more than half a month. If the pain lasts for a long time, it is recommended to check it.
In addition, I offer direct mail of American products here.