Dietitians say the best morning drink for hydration is also the simplest: plain water. With so many electrolyte beverages, wellness shots and trendy morning drinks on the market, it can be easy to overcomplicate hydration. But after a night of sleep, water is the most direct way to help your body rehydrate at the start of the day.

Experts point to several reasons plain water stands out in the morning. Starting the day well hydrated may help support cognitive function, which can matter for focus and mental clarity. It can also play a role in digestion and may help you feel more physically ready for the day ahead.

Another reason water gets the nod is that it does its job without extra ingredients, sugar or stimulants. While specialty drinks may have a place for some people, they are not usually necessary for basic morning hydration. For many adults, plain water is enough to begin replacing fluids lost overnight.

The takeaway is straightforward: if you want the healthiest drink to start your day, water remains the top choice according to dietitians. In a crowded field of wellness products, the most effective option for morning hydration is often the most basic one.