Are hard seltzers healthy?
No. A hard seltzer looks like sparkling water, but a 12 oz can at 5% has 14 g of alcohol, one full US standard drink, the same as a beer or a 5 oz glass of wine. It’s sold as low in carbs and sugar, which is where the healthy image comes from. The alcohol is still the cost.
Hard seltzers were sold on what they don’t have: few carbs, little sugar, a clean label. None of that touches the main ingredient. The alcohol in a seltzer does exactly what the alcohol in a beer does, to your sleep, your liver and your cancer risk.
What we’d do
Count each can as a full drink. Seltzers go down easily and come in 12-packs, so they’re easy to over-drink without noticing. If it’s the fizz and the cold can you like, switch every other one for plain sparkling water with lime.
The pros
- The calories are mostly the alcohol. At about 98 calories of alcohol a can, a seltzer with little sugar comes in under a regular beer’s 153. Check the label for the sugar.
- Easy to count. Most come in 12 oz cans at a stated strength, so the math is simple: 12 oz at 5% is one drink.
The cons
- It’s a full drink. NIAAA’s standard drink chart puts flavored malt drinks like hard seltzer at about 7% in some cases, where 8 to 10 oz is already one drink, so check the can. A 12 oz can at 8% is about 1.6 drinks.
- The calories can’t go below the alcohol. Alcohol carries about 7 calories a gram, so the 14 g in a 5% can is about 98 calories before anything else.
- Same risks as any alcohol. Seven cancers, blood pressure and sleep: across 27 studies, even about two drinks cut REM sleep.
- Easy to over-drink. Four cans in two hours is NIAAA’s binge line for women, five for men.
What’s in your glass shows how every common pour counts, and the best non-alcoholic drinks has the version without the alcohol: real seltzer.
1 US drinks
Hard seltzer, 12 oz, 5%: 14 g of alcohol and about 98 calories from the alcohol alone.
When will tonight's drinks clear?
Bed at 11:00pm
Mostly cleared by 2:50am
That's about 3.8 hours of your sleep with alcohol in your blood (3.1 to 4.9 if your liver runs faster or slower).
Restaurant pour6 oz, 13.5%, 1.35 US drinks- Restaurant pour6 oz, 13.5%, 1.35 US drinks
REM: More REM lost. Your evening is 0.56 g of alcohol per kg of body weight.
The full clock, with the band, the same drinks two hours earlier and what your heart does.
6 sources
- National Institute on Alcohol Abuse and Alcoholism, What Is A Standard Drink? Updated December 2025niaaa.nih.gov
- MedlinePlus, Calories in alcoholmedlineplus.gov
- National Cancer Institute, Alcohol and Cancer Risk, reviewed May 2, 2025cancer.gov
- Gardiner C and others, The effect of alcohol on subsequent sleep in healthy adults: a systematic review and meta-analysis, Sleep Medicine Reviews, 2025pubmed.ncbi.nlm.nih.gov
- National Institute on Alcohol Abuse and Alcoholism, Rethinking Drinking, Alcohol Calorie Calculatorrethinkingdrinking.niaaa.nih.gov
- National Institute on Alcohol Abuse and Alcoholism, Drinking Levels and Patterns, updated January 2026niaaa.nih.gov
