I know you can drink the liquid inside young coconuts, but what about the liquid that comes inside a coconut with a hard, brown shell. Is that good to drink too?
If it is drinkable, is it beneficial? How?
When I was a kid we drank it all the time, because the green ones are a bitch to open without any tools. During recess we would repeatedly throw the mature ones against a wall to loosen up the shell. Back then it didn't take much to keep kids happy, just a coconut and a brick wall.
From what I've read, the coconut water in mature coconuts is still very nutritious, but inferior in quality (and taste) compared to green coconuts.
This is the nutritional information for coconut water. It tends to be high in electrolytes like potassium and has a pretty good mineral profile as well.
Many years ago during a military survival course, I remember them saying in a survival situation when fresh water is unavailable, to only drink the liquid from green coconuts. To drink exclusively from ripe ones would cause severe diarrhea. Drinking the water from the mature coconuts infrequently will not cause a problem.