We might have to concentrate the vinegar as the acidity is not high enough for ginger and turmeric. It must be minimum 4 %
The mangosteen is nearly ok naturally. So we might have to use less water and more fructose or cook it to evaporate the water
100degrees Celsius but not over 115 degrees otherwise the acid is also evaporating
The results are like this
Turmeric Vinegar 1.68%
Ginger Vinegar 1.21%
Mangosteen Vinegar 3.47%
We have to get more acetic acid in the product