1 cup Coconut water has 6g protein according to https://nutritiondata.self.com/facts/nut-and-seed-products/3115/2I can’t imagine fermentation would change the protein content, and a quick google shows coconuts do not have all the essential amino acids necessary.Coconut water however is nutrient densehttps://nutrientoptimiser.com/nutritional-value-nuts-coconut-water-liquid-from-coconuts/