For me just the fact that I found this on Amazon
I used this product with a combination of camphor squares in water to gargle  with for sore throat or if have pimple on tongue it help to take pain and shrink it. A remedy I was taught by my mom.  Alum is very tart and it helps to shrink the sore away. I used a little less than a half teaspoon in a Mason jar of water. Very tart so I always add little more water in a cup if I am going to use. I forgot what the camphor does. I know it works as I suffered a lot with sore throat growing up.
Rating: 5 stars