I don’t believe in those zinc tablets that you’re supposed to take when you’re coming down with a cold. They supposedly reduce the seriousness or length of your cold. There is no science to support this.
HOWEVER, Bob was sick and asked me to buy some and I felt a cold coming on. Since we had them, I took them. Three tablets for three days. My cold never settled in. I felt iffy with the sniffles and I only coughed for about 3 days. A three day cough! Normally if my body has a chance to cough it digs in and gives me three full weeks to enjoy it.
So, I don’t believe in them, but I would use them again.