Converting Apple Juice into Hydration Powder

How we’ve tried to create apple juice powder that mimics half strength apple juice:
 

When choosing our base hydration formula, we took the carbohydrates (g/L), and created a ratio that was the exact same for our recommended serving size. For example, half-strength apple juice has 60 g of carbohydrates/L. Our recommended serving size of one scoop in 250ml of water = 15g total carbohydrates. 

To maintain the same ratio of electrolytes as what was listed in the study, we then converted the sodium, potassium, and chloride from mmol/L (listed in the above table from the study), to mg, and adjusted to our serving size. Note that despite the 0mmol/L of salt in half strength apple juice, the study found that ½ strength apple juice performed just as well as sucralose sweetened electrolyte solutions (i.e. Pedialyte), and was better tolerated.

A small amount of potassium chloride was added to our product to ensure the same ratios as what was listed for half strength apple juice, in the study.

Once our base hydration formula was established we looked at other ingredients that have evidence to support their use, that could have benefits to the consumer. From the extensive literature review, the ingredients that we felt could offer the most potential benefit, were Magnesium and Vitamin D.