What Drinks Are Good for You, According to Science

Water is the single best drink for your body, but it’s far from the only healthy option. Plain or sparkling water, coffee, tea, milk, and certain fermented drinks all offer real benefits when you choose versions without loads of added sugar. The key is understanding what each drink actually gives you and where the common pitfalls are.

Water Comes First

No drink replaces water. It regulates your body temperature, cushions your joints, delivers nutrients to cells, and keeps every organ functioning. The National Academy of Medicine recommends about 13 cups (104 ounces) of total daily fluids for adult men and 9 cups (72 ounces) for adult women. Pregnant women need roughly 10 cups, and breastfeeding women need about 13. These numbers include fluid from food, which typically accounts for about 20 percent of your intake.

Those figures are a general guide, not a rigid target. Your exact needs shift based on your body size, how much you sweat, the climate you live in, and how active you are on any given day. A simple check: if your urine is pale yellow, you’re likely well hydrated.

Sparkling Water Is Just as Safe

If you find plain water boring, sparkling water is a solid alternative. A common concern is that the carbonation damages tooth enamel, but research from the American Dental Association found that sparkling water and regular water had about the same effect on enamel. Even though carbonation makes water slightly more acidic, it’s essentially all just water to your teeth. The caveat: flavored sparkling waters with added citric acid or sugar are a different story. Stick to unflavored or naturally flavored varieties without sweeteners.

Coffee and Tea Without the Extras

Black coffee and unsweetened tea are two of the healthiest drinks available. Both are calorie-free, rich in antioxidants, and associated with lower risks of several chronic diseases. Coffee in particular has strong links to reduced risk of type 2 diabetes, certain liver conditions, and neurodegenerative diseases.

The FDA considers up to 400 milligrams of caffeine per day safe for most adults, which works out to roughly two to three 12-ounce cups of brewed coffee. A standard cup of black tea has about half the caffeine of coffee, so tea drinkers have more room before hitting that ceiling. Green tea offers similar benefits with even less caffeine.

Where coffee and tea go wrong is at the counter. A large flavored latte or sweetened iced tea can contain 40 to 60 grams of sugar, turning a healthy drink into something closer to a dessert. If you need flavor, a splash of milk or a small amount of honey keeps the benefits intact without the sugar load.

Milk and Plant-Based Alternatives

Cow’s milk delivers a strong nutritional package: about 8 grams of protein and 300 milligrams of calcium per cup. Ultrafiltered varieties push that even higher, with around 13 grams of protein and 380 milligrams of calcium. For bone health and muscle recovery, it’s hard to beat.

Among plant-based milks, soy milk comes closest to cow’s milk with about 7 grams of protein per cup. Many brands are also fortified with calcium to match dairy levels. Almond milk, on the other hand, has just 1 gram of protein per cup, making it a poor substitute if you’re relying on milk for protein. Oat milk falls somewhere in between and tends to be higher in carbohydrates. If you’re choosing a plant-based option, check the label for calcium fortification and watch for added sugars, which some brands use generously.

Fermented Drinks and Gut Health

Kombucha and kefir have gained popularity for their probiotic content. Kombucha is a fermented tea that contains a mix of beneficial bacteria and yeasts. Lab and animal studies suggest it may help reduce inflammation and support a more diverse gut microbiome, though large-scale human clinical trials are still limited. Kefir, a fermented dairy drink, has a longer track record and delivers both probiotics and the protein and calcium you’d find in regular milk.

Both drinks can be healthy additions to your routine in moderate amounts. The biggest thing to watch is sugar. Some commercial kombucha brands add sugar after fermentation, pushing a single bottle past 15 or 20 grams. Look for options with under 5 grams of sugar per serving.

When You Actually Need Electrolyte Drinks

Sports drinks and electrolyte beverages have their place, but it’s a narrower one than marketing suggests. The American College of Sports Medicine notes that most people who exercise for less than 60 to 90 minutes in normal weather conditions are unlikely to become dehydrated or depleted of electrolytes. Plain water handles the job for the vast majority of workouts.

Electrolyte replacement becomes more relevant during prolonged, intense exercise in heat. Athletes who sweat heavily can lose 500 to 700 milligrams of sodium per hour of vigorous activity. In those cases, replenishing sodium and potassium matters. But you don’t necessarily need a commercial product. Real foods like pickles, olives, or crackers with cheese after a sweaty session work just as well. If you do grab a sports drink, choose low-sugar or sugar-free versions. Traditional sports drinks often pack 30 or more grams of sugar per bottle.

Drinks Worth Limiting

The Dietary Guidelines for Americans recommend keeping added sugar below 10 percent of your daily calories. For someone eating 2,000 calories a day, that’s about 50 grams, or roughly the amount in a single 16-ounce soda. Sugary drinks are the largest source of added sugar in the American diet, and they deliver calories without making you feel full, which makes it easy to overdo it day after day.

Soda, sweetened iced teas, energy drinks, and most fruit “cocktails” or “drinks” (as opposed to 100 percent juice) fall into this category. Even 100 percent fruit juice, while it contains vitamins, is high in natural sugars and lacks the fiber of whole fruit. A small glass (4 to 6 ounces) is fine, but drinking it by the pint offers diminishing returns.

Diet sodas and zero-calorie sweetened drinks are a step up from their sugary counterparts in terms of calories, but they don’t offer any of the positive benefits that water, tea, or coffee provide. They’re a neutral choice at best.

A Simple Framework

Your daily drink lineup doesn’t need to be complicated. Water as your baseline, coffee or tea for flavor and a caffeine boost, and milk or a fortified plant-based alternative for protein and calcium covers nearly everything your body needs from beverages. Kombucha or kefir can add variety and gut-friendly bacteria. Electrolyte drinks earn their spot only during long, sweaty efforts. Everything else, particularly anything with a long ingredient list or more than a few grams of added sugar per serving, is worth treating as an occasional choice rather than a daily habit.