For HYDRATE!, mix one scoop (5.4g) with 16–24oz of cold water — within your total daily fluid intake, which general guidance from the National Academies of Sciences, Engineering, and Medicine puts at roughly 11.5 cups (about 92oz) for women and 15.5 cups (about 124oz) for men, including fluid from food and all beverages.
Adjusting the water-to-scoop ratio
Within the 16–24oz range, using less water produces a stronger, more concentrated flavor, while using more makes it lighter. There's no single "correct" amount — it's a matter of personal taste, as long as you stay within the suggested range on the label.
Daily totals vs. per-serving amounts
The per-serving water amount (16–24oz) is about how to prepare a single scoop of HYDRATE!, not your total daily water target. Overall daily fluid needs vary by body size, activity level, and climate — the National Academies figures above are a general reference point, not a strict requirement for everyone.
When you might need more
Hot weather, exercise, illness, and travel all increase fluid needs above baseline. On those days, using more than one serving of HYDRATE!, spaced throughout the day, is reasonable.