What to drink on keto
July 9, 2026 · 5 min read
Drinks are where carbs show up without warning. A glass of orange juice is 26g of sugar. A Gatorade is 21g. A large sweetened Starbucks drink can clear your entire day's carb budget before you get to lunch. The ones to add and the ones to cut are usually obvious once you know what to look for.
Drink freely
Water. The default. Zero carbs, keeps you hydrated as keto accelerates water loss through the kidneys. See keto electrolytes for why you often need to add sodium to the water in the early weeks.
Sparkling water. Same as water, with bubbles. Unsweetened sparkling water (plain or fruit-flavored without sweetener) is zero carbs. LaCroix, Bubly, and similar brands are fine.
Black coffee. Zero carbs. Coffee with heavy cream is still very low carb (about 0.4g per tablespoon of cream). Coffee with butter or MCT oil (bulletproof style) adds fat, not carbs.
Unsweetened tea. Hot or iced — any plain tea, green, black, or herbal, with no added sweetener is zero carbs. Bottled iced teas are often sweetened; check the label.
Bone broth. One of the best keto drinks, because it adds sodium and other electrolytes at the same time. A cup of plain bone broth in the first few weeks of keto does more than any sports drink.
Drink with awareness
Coffee with alternative milks. Almond milk (unsweetened) runs about 1g carbs per cup. Oat milk and regular milk are much higher (around 12g). Heavy cream is the reliable keto option for coffee.
Diet soda. The debate never fully settles. Diet soda has near-zero net carbs and won't knock you out of ketosis in the carb sense. Some people report that artificial sweeteners trigger cravings or affect appetite — the research on this is mixed and the effect is individual. If diet soda helps you avoid regular soda without causing carb creep, it's a reasonable trade. If it seems to trigger overeating or stalls your progress, cut it and see.
Electrolyte drinks. Many commercial electrolyte drinks contain significant sugar — Gatorade, Powerade, and most sports drinks do. Look for the sugar-free or zero versions, or powder supplements, and check that the net carbs are actually near zero. See keto electrolytes for more on what to look for.
Alcohol. Spirits (vodka, whiskey, tequila, gin) are essentially zero carbs. Dry wines are low (1–3g per glass). Beer is high in carbs (10–15g, sometimes more) and largely incompatible with strict keto. The full picture — including how alcohol interacts with ketosis and weight loss — is in keto and alcohol.
Avoid these
| Drink | Why |
|---|---|
| Regular soda | 35–45g sugar per can |
| Juice (any) | 25–35g natural sugar per glass |
| Sports drinks (regular) | 20–25g sugar per bottle |
| Sweetened coffee drinks | Often 40–60g sugar per large cup |
| Smoothies and frappuccinos | Usually 40–80g depending on what's in them |
| Cocktail mixers | Tonic water, cranberry juice, simple syrup — all high sugar |
| Sweetened tea (bottled) | Often 20–25g sugar per bottle |
| Plant-based milks (sweetened) | Check — sweetened oat milk can be 20g per cup |
The pattern is the same as the keto food list: it's the added and natural sugar that disqualifies a drink, not the drink category. Black coffee is fine; a caramel macchiato is not.
The practical version
Stock the fridge with sparkling water. Make coffee at home where you control what goes in it. Drink bone broth in the first couple of weeks. Check any bottled drink you didn't make — sugar hides in drinks better than almost anywhere else.
Tell Copper Keto Companion "coffee with heavy cream" or "sparkling water" and it confirms the net carbs. If you're unsure about a drink you're holding, say what it is and it'll tell you where it lands.
FAQ
Can I drink coffee on keto? Yes. Black coffee is zero carbs. Add heavy cream (not milk), butter, or MCT oil to keep it keto. Avoid flavored syrups and sweetened versions.
Is sparkling water okay on keto? Yes, as long as it's unsweetened. Plain sparkling water and fruit-flavored sparkling water without sugar or sweetener are both fine.
What's the best keto energy drink? Most commercial energy drinks are loaded with sugar. Look for zero-sugar versions (Monster Zero, Bang, Celsius) and check the label — some are near-zero carbs, others aren't. The caffeine is fine on keto.
Can I drink alcohol on keto? Spirits are near-zero carbs. Dry wine is low. Beer is high. See keto and alcohol for the full picture on how alcohol affects ketosis and weight loss.
Does diet soda break ketosis? Not in the carb sense — most have zero net carbs. Whether it affects appetite or stalls progress is individual and debated. Try removing it if you're stalling despite staying in your carb range.