Take broad-spectrum probiotics 1 month, because broad-spectrum probiotics are one kind of probiotics, and one month is a course of treatment. Probiotics are commonly used drugs to regulate intestinal flora in clinic. 70% of the human immune system is in the intestine. Probiotics can improve their immunity by improving nutrient absorption, inhibiting harmful microorganisms and removing enterotoxins produced by toxic Escherichia coli in the intestine.