Green tea, black coffee, and hibiscus tea consistently rank among the healthiest drinks you can choose after water. Each delivers protective plant compounds with measurable effects on metabolism, blood pressure, and long-term disease risk, all with few or zero calories. But several other options earn a spot on the list depending on your goals, from coconut water for hydration to tart cherry juice for recovery.
Green Tea
Green tea is the closest thing to a universally recommended health drink. Its main active compound accounts for about 50% of the total protective plant chemicals in tea leaves and has been studied more extensively than almost any other dietary ingredient. A meta-analysis of randomized controlled trials found that consuming less than 500 mg of green tea per day for 12 weeks led to significant reductions in body weight, BMI, and waist circumference. Separate research in people with type 2 diabetes showed improvements in triglycerides and total cholesterol with regular intake over eight or more weeks.
A standard cup of brewed green tea contains roughly 50 to 100 mg of its key protective compound, so three to four cups a day keeps you well within the safe range. European food safety authorities have flagged that concentrated supplement doses at or above 800 mg per day could stress the liver, but drinking brewed tea makes it nearly impossible to reach that level. You also get a modest caffeine boost of about 25 to 50 mg per cup, enough to sharpen focus without the jitteriness of coffee.
Black tea offers similar benefits on a smaller scale. It contains different but related plant compounds that support heart health, and its higher caffeine content (around 50 to 90 mg per cup) makes it a reasonable coffee alternative.
Black Coffee
Plain black coffee, with no sugar or cream, is one of the most well-studied beverages in nutrition research. A large analysis published in Circulation, covering three major long-running health studies, found that people who drank one to three cups per day had about a 9% lower risk of dying from any cause compared to non-drinkers. Drinking three to five cups still showed a 7% reduction. Beyond five cups, the benefit disappeared but the risk didn’t increase either.
Coffee is the single largest source of protective plant compounds in the average Western diet, not because it has more per serving than fruits or vegetables, but because people drink so much of it. Those compounds help regulate blood sugar, reduce inflammation, and support liver function. 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.
The key is keeping it simple. Once you add flavored syrups, whipped cream, or large amounts of sugar, you’ve turned a zero-calorie health drink into a dessert.
Hibiscus Tea
If you’re looking for something caffeine-free with a specific cardiovascular benefit, hibiscus tea stands out. A USDA-backed study found that drinking hibiscus tea daily lowered systolic blood pressure by 7.2 points compared to a placebo. Among participants who started with elevated readings (129 or above), the effect was even stronger: systolic pressure dropped 13.2 points, diastolic pressure fell 6.4 points, and mean arterial pressure decreased by 8.7 points.
Those numbers are meaningful. A sustained drop of even 5 points in systolic blood pressure significantly reduces heart attack and stroke risk over time. Hibiscus tea has a tart, cranberry-like flavor that works well iced, making it a practical swap for sweetened beverages. It’s naturally calorie-free when unsweetened.
Coconut Water
Coconut water fills a specific niche: natural electrolyte replacement. A single cup of store-bought coconut water provides 470 mg of potassium and 30 mg of sodium. That potassium content is higher than a banana and makes coconut water useful after moderate exercise, during hot weather, or when you’re recovering from illness.
It does contain natural sugars, typically 9 to 12 grams per cup, so it’s not a zero-calorie option. But compared to sports drinks, which often pack in added sugars, artificial colors, and 20-plus grams of sugar per serving, unsweetened coconut water is a cleaner choice. Check the label for versions without added sugar or flavoring.
Vegetable Juice
Vegetable juice offers a concentrated dose of nutrients with far less sugar than fruit juice. An eight-ounce glass of orange juice or apple juice contains about 30 grams of sugar, nearly eight teaspoons, roughly the same as a cola. A traditional tomato-based vegetable juice, by contrast, has just two teaspoons of sugar for the same serving size.
Cold-pressed green juices made from cucumber, celery, spinach, and similar vegetables push the sugar content even lower. The trade-off is that juicing removes most of the fiber from whole vegetables, so you lose the gut health and blood sugar benefits that fiber provides. Think of vegetable juice as a nutrient supplement, not a replacement for eating vegetables. Watch for sodium content in commercial brands, some pack over 600 mg per serving.
Tart Cherry Juice
Tart cherry juice has earned attention for two specific uses: exercise recovery and sleep support. Its deep red color comes from anthocyanins, the same class of compounds found in blueberries and red cabbage, which act as potent anti-inflammatory agents.
Research on resistance-trained athletes found that tart cherry supplementation over a 10-day period reduced subjective muscle soreness during recovery and lowered biological markers of muscle damage. The effective protocols vary, but a common approach is 60 to 90 mL of cherry juice concentrate diluted with water, which delivers roughly 550 to 820 mg of anthocyanins. A larger glass of regular (non-concentrate) cherry juice provides significantly less, around 80 mg of anthocyanins per 300 to 400 mL serving, so concentrate is more practical.
Tart cherry juice does contain natural sugars, typically around 25 grams per cup of the non-concentrate version. If you’re watching sugar intake, the concentrate diluted with water gives you more of the active compounds in a smaller, lower-sugar serving.
How to Think About “Healthiest”
No single drink replaces the full spectrum of nutrients you get from a varied diet. The healthiest choice depends on what your body needs. Green tea and coffee are strong daily defaults for most people, offering protective compounds and caffeine with zero calories. Hibiscus tea makes sense if blood pressure is a concern. Coconut water works when you need electrolytes. Tart cherry juice earns its place around hard training sessions.
The common thread across all of these is what they don’t contain: added sugar. The moment a drink starts carrying 25 to 40 grams of added sugar per serving, whether it’s a smoothie, a sweetened iced tea, or a fruit juice blend, whatever health benefits it offers get overshadowed. Keeping your drinks simple, unsweetened, and close to their natural form is the single most reliable rule for choosing well.