Salt helps with digestion

My personal observation:

Gauva

When I eat plain unripe gauva, it's little difficult to digest.
But when I eat it with a little salt, it's easily digested.

Mature Coconut

Mature coconut is difficult to digest. Hence, usually in South India, it coconut chutney is prepared with various spices (coriander, ginger, etc.,) and salt for easy digestion. So, salt must be helping with digestion.

http://healthsummary.blogspot.in/2017/09/tender-coconut-water-relives-pitta.html