Does iced coffee dehydrate you—or hydrate you?

Medically reviewed by Jamie Johnson, RDN

Key Takeaways

• Iced coffee can contribute to your daily fluid intake.
• Moderate coffee consumption is unlikely to cause dehydration in healthy adults.
• Water should remain your primary beverage for hydration.

Water is still the best choice for staying hydrated, but iced coffee can contribute to your daily fluid intake. Although caffeine has a mild diuretic effect, moderate amounts of caffeine generally isn’t dehydrating for most healthy adults.

Is Iced Coffee Hydrating?

Moderate amounts of caffeinated coffee can count towards daily hydration goals. However, some experts recommend against drinking caffeinated beverages for hydration due to their diuretic effect, which may cause you to lose more fluids.

Diuretic substances stimulate fluid loss through urination, sweating, or breathing. While the caffeine in coffee does have this effect, the research conflicts on whether or not it influences hydration.

Additionally, since iced coffee is made primarily with water—and often becomes further diluted as ice melts—it still contributes the amount of water you consume.

That said, water is still recommended for hydration above other beverages, including coffee, because it doesn’t have anything else added to it that could cause health effects.

When Coffee May Reduce Hydration

Caffeine is more likely to make you more dehydrated if you:

• Consume large amounts
• Are sensitive to caffeine
• Are physically active
• Are already dehydrated

Moderate amounts of coffee (about two to three cups per day) is unlikely to cause significant disruptions in fluid balance, but regularly drinking four or more cups of coffee may induce a diuretic effect, according to research.

How Much Caffeine is Too Much?

The recommended upper daily limit of caffeine from all sources for adults who are not pregnant or breastfeeding is about 400 mg. An 8-ounce (oz) cup of coffee contains about 95-200 mg of caffeine.

It is easy to drink more than this with iced coffee because of the ease of drinking it more quickly. It is important to know the actual size of the coffee you are drinking and the amount of caffeine in it, so you know how to prevent yourself from going over the recommended limit.

What’s in Your Iced Coffee Matters

Plain coffee is a low-calorie, fat-free, sugar-free drink option, but what is added to it can drastically change its nutrition profile.

Flavored sugar syrups and sweeteners can increase the sugar content of your drink. Cream, flavored creamers, and whipped toppings add calories and saturated fat, which can add up when consumed regularly.

Healthier ways to enjoy iced coffee include:

• Drink it black.
• Add a splash of low-fat milk or oat milk for creaminess.
• Choose unsweetened or lightly sweetened add-ins.
• Try properly diluted cold brew, which has a naturally milder flavor and may require fewer sweeteners.

How Much Water Do You Actually Need?

Your hydration needs depend on factors such as body size, activity level, climate, and more. One general fluids (from food and drink) recommendation from the National Academy of Medicine is about 11 cups (88 oz) per day for women and about 15 cups (120 oz) per day for men.

One simple way to gauge your hydration is to check your urine. Pale yellow or nearly clear urine generally suggests adequate hydration, while darker urine may mean you need more fluids. Other symptoms may include thirst, dizziness, and fatigue.

You may need to drink more fluids if you are:

• An older adult (dehydration can create a fall risk)
• In a hot climate
• Being physically active
• Experiencing a fever, diarrhea, or vomiting
• Sweating a lot

Simple Ways to Stay Hydrated

Some ways to stay hydrated include:

• Make hydration part of your routine: Drink fluids regularly throughout the day, keep water nearby to sip, and drink with meals.
• Choose water over other beverages: Choose water (sparkling or still) more often than drinks such as soda.
• Drink more when you need it: Drink more during hot weather or when you are being active. Consider an electrolyte drink for long workouts in hot temperatures.
• Monitor your hydration: Pay attention to thirst and, if needed, track your fluid intake.
• Eat water-rich foods: Supplement your water intake with foods high water content. such as melon, berries, grapes, cucumber, celery, and other produce.
• Make water more appealing: Add citrus wedges, cucumber slices, or mint for flavor.

Read the original article on Verywell Health