I don't know a better place to ask this question, so here goes.

The Blue zones of the world Okinawa japan
Sardinia Italy
Icaria Greece
Ect
Are regularly studied regarding what they eat and what they do for a living.

But I can't find anything documenting their hygine habits online anywhere.. I figure it'd be interesting to know how much these people bathe, what soaps they use if any.. toothpaste, shampoo, if it's common in those areas to clean your pooper with water rather than toilet paper. If they use mouthwash or any other products big companies want us to buy to improve our health