Is Coffee Good to Drink While Dieting?

Whether you crave coffee as a mid-afternoon caffeine fix or a morning pick-me-up, you're in good company. Coffee can work well in a weight-loss diet — and even offer some benefits, especially if you're exercising to lose weight.

Drinking coffee may help power up your workouts to promote weight loss. Credit: Abdulrhman Al Shidokhi/500px Prime/GettyImages

However, if you're drinking your coffee with sugar, half-and-half or flavored creamers, you're voiding any weight-loss benefits. Drink it black and practice moderation to avoid side effects.

Tips

Coffee is good for dieting when you drink it black and limit calories from mix-ins.

Read more: 14 Legit Ways Coffee Can Boost Your Health

Drink Your Coffee Black

When you're dieting, drink your coffee black and avoid going for sweetened coffee beverages. Plain coffee has a negligible amount of calories. According to the USDA, a cup of brewed coffee has 2 calories, a serving instant coffee contains 4 calories and an ounce of espresso has just 3 calories. If you're going for these plain beverages, you won't add to your daily calorie intake, so you can still easily stick to the calorie-restricted diet you'll need to follow to lose weight.

While black coffee is very low in calories, the same doesn't hold true of coffee with mix-ins. According to the USDA, an ounce of cream or half-and-half will set you back 57 and 37 calories, respectively, and sugar has 16 calories per teaspoon. A mocha, made from a powder mix, has 60 calories per serving and a specialty coffee made with syrup, milk and whipped cream can contain hundreds of calories. These should be limited — or avoided entirely — in a weight-loss diet.

Coffee and Weight-Loss Truth

While the research on coffee and weight loss is still in the preliminary stages, there's some evidence that drinking coffee can help you on your weight-loss journey. One study, published in a 2015 issue of the International Journal of Epidemiology, investigated the diet habits of almost 100,000 people to find out whether coffee intake was linked to health problems, including obesity.

The study authors found that habitual coffee drinkers had a lower risk of obesity than coffee abstainers, but note that they couldn't determine whether coffee was the actual cause of the lower obesity risk.

Coffee might have greater weight-loss benefits when you're already close to your goal weight, though, according to a older review published in an October 2006 issue of the American Journal of Clinical Nutrition. The review, which summarized the results from several studies, explains that caffeine is more effective at boosting metabolism and fat burning in nonobese study subjects compared to obese subjects.

According to a November 2015 study published by European Journal of Clinical Nutrition, coffee consumption might support weight-loss maintenance.

So while coffee can be worthwhile to add to a weight-loss diet, it will likely be most effective when you're near the end of your weight-loss journey.

Read more: 9 Ways You're Doing Coffee All Wrong — and How to Get It Right

Drink Coffee Before Exercise

There's more evidence that drinking coffee will support your exercise routine, which can help you power through your workouts and lose more weight. One small study, published in PLOS One in April 2013, found that eight trained male cyclists/triathletes who drank coffee or took caffeine an hour before their endurance workout were able to cycle faster and had more endurance than those who didn't.

A review from the November 2015 issue of International Journal of Sport Nutrition and Exercise Metabolism reports that coffee also lowers the rate of perceived exertion, or RPE, during exercise. The RPE is a measure of how hard you feel you're working, and lower RPE workouts feel easier. By reducing RPE — making your workouts feel easier — caffeine can help you push yourself harder during exercise, so you can burn more calories.

Limit Your Coffee Calories

Keep the calories down by experimenting with virtually calorie-free seasonings for your coffee. Add a sprinkling of cinnamon or pumpkin pie spice to your coffee grounds during brewing for a spicy, festive-tasting brew, or stir vanilla extract or vanilla bean into your coffee for a warm, comforting mug.

If you need a little sweetness to offset coffee's bitter flavor, try a diet-friendly natural sweetener, like stevia — look for flavored stevia packets designed for use in coffee to add extra flavor to your brew. And use a splash of unsweetened almond milk instead of cream or half-and-half — a quarter-cup has just 10 calories, according to the USDA.

Limit your caffeinated coffee intake to two to three cups daily. Any more than that and you risk getting too much caffeine, which can cause jitters and anxiety, as well as disrupt your sleep cycle.

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