There's no single required time — morning, around workouts, mid-afternoon, and even evening are all reasonable, and the right time depends on when you personally need it most. Here's how to think about timing rather than follow a strict rule.
Morning
You go several hours without fluid overnight, so many people find a scoop with their first glass of water in the morning a useful way to start the day hydrated, rather than reaching straight for coffee.
Around exercise
Before, during (for longer sessions), or after a workout are all reasonable windows, depending on your sweat rate and workout length. See our workout hydration guide for specifics.
Afternoon
The early-to-mid afternoon slump is a common time people reach for coffee or a sugary snack. Since HYDRATE! is caffeine-free, it can be a useful afternoon habit without affecting sleep later.
Evening
Because HYDRATE! contains 0mg of caffeine, it's also fine to use in the evening — something you can't say for most "energy" electrolyte products.
The bottom line
Pick the time (or times) that fit your actual routine and where you notice the biggest hydration gap, rather than following a one-size-fits-all schedule.