01 - Combine tart cherry juice and magnesium powder in a glass. Stir thoroughly until magnesium is fully dissolved.
02 - Incorporate ice cubes if preferred.
03 - Top with chilled seltzer water and gently stir to blend.
04 - Garnish with a lemon or lime wedge, if desired.
05 - Serve immediately as a calming pre-bedtime beverage.