What can I drink on keto besides water? If you love coffee (like most people do), you might wonder if it’s allowed on a very low-carb diet. After all, coffee is a great energizer and can be used to help with weight loss.
This article answers the question, “Is coffee keto-friendly?”
We’ll look into its nutrition facts, common ingredients that increase the number of carbs in coffee, its health benefits, and how to make coffee keto-friendly.
Is Coffee Keto?
One cup or 8 fl oz of plain brewed coffee has 0g carbs, 0.1g fat, 0.3g protein, and 2.4 calories, which makes it a keto-friendly beverage.  Brewed coffee also provides potassium, calcium, and magnesium in small amounts.
Since coffee is completely carb-free, it fits perfectly into your keto diet and pairs well with eggs, cheese, berries, dark chocolate, and keto-friendly desserts.
Unless you’re sensitive to caffeine, you can safely drink 4-5 cups per day (with a maximum intake of 400 mg of caffeine for women). 
However, keep in mind that whatever you add to your coffee can increase its number of carbs, which can mean the difference between maintaining or falling out of ketosis. Things that can quickly raise carbs in coffee include brown sugar, honey, low-fat milk, and flavoring syrups. Be sure to avoid these ingredients at coffee shops or better yet, brew your own coffee at home.
If you don’t enjoy plain brewed coffee, you can use a natural sweetener like stevia or monk fruit that won’t raise your coffee’s carb count or affect your blood sugar. (Later in this article, we’ll show you three keto-friendly ways to enjoy coffee using different add-ins!)
The Benefits of Coffee on Keto
As one of the best keto-friendly energy drinks out there, plain black coffee is helpful for:
- Supporting intermittent fasting. Plain coffee (without milk or other ingredients) won’t disrupt an intermittent fast and may even enhance its benefits, such as by reducing your risk of prediabetes and type 2 diabetes and increasing mental function.  
- Boosting athletic performance. If you’re an avid exerciser or train regularly, caffeine in coffee acts as a stimulant so that you’ll be able to push through your workout and not get easily fatigued.  Try this: Drink coffee 30 minutes to 1 hour before your next sweat session.
- Increasing ketone levels. Here’s another interesting benefit of coffee, especially those who are new to keto—it may help you enter a deeper level of ketosis. A 2017 randomized controlled trial found that caffeine increased plasma beta-hydroxybutyrate (BHB), the most abundant ketone, in a dose-dependent manner. In other words, higher doses led to higher ketone levels. The same study also mentioned that adding medium-chain triglycerides (MCTs) to caffeine may prolong mild ketosis. 
3 Ways to Enjoy Keto-Friendly Coffee