Some people are also allergic to them. I was getting canker sores in my mouth for years without understand why. Then my cousin discovered he’s allergic to SLS.

Some people are also allergic to them. I was getting canker sores in my mouth for years without understand why. Then my cousin discovered he’s allergic to SLS. I quit toothpaste with SLS and I never get them anymore. It’s rare but you never know who else struggles with it and doesn’t know.