Coconut vinegar is made from the sap of the coconut tree. This is called Tuba. Tuba is collected from the stem that "feeds" the coconuts. A "Tuba Collector" climbs to the top of the coconut tree and clips the stem that contains flowers and baby coconuts. Then a collection vessel is hung from the tree and the stem placed so the sap will run into it. Every day a collector travels from treetop to treetop on bamboo poles to collect the sap from each tree.
Coconut sap is similar to fresh coconut water and contains lots of minerals and vitamins. The high mineral content seems to be because these trees are grown in the rich volcanic soil on tropical islands. Naturally fermented coconut vinegar contains vitamins and minerals like Beta-carotene, Calcium, Iron, Magnesium, Phosphorous, Potassium and Sodium. Often it can just be low potassium that causes leg cramps, a foggy brain, low thyroid function, and low energy. So far many people have muscle-tested very strong for this wonderful vinegar. Everyone seems to test much stronger for the coconut vinegar than people test for apple cider vinegar.