Can I mix?Reviewed: Jan 11, 2026~1 min

Can I Mix Coffee and Lemon Juice When the Office Lacks Milk and I’m Acid-Sensitive?


Short answer

⚠️Depends / use caution

It depends. Combining coffee and lemon juice can increase acidity, which may trigger discomfort for those sensitive to acid or prone to heartburn, especially with freshly brewed coffee and fresh lemon.


Why people ask this

People may want to enhance the flavor of coffee or find a milk replacement when only lemons are available but worry about potential effects on sensitive stomachs.

When it might be safe

  • If you use only a minimal amount of lemon
  • When enjoyed with a non-acidic snack to buffer stomach acids
  • If you’ve tolerated similar acidic drinks before

When it is not safe

  • If you have a history of acid reflux or heartburn
  • When your stomach is empty and you’re sensitive to acids
  • Using more than a small splash of fresh lemon juice

Possible risks

  • Increased acidity can cause stomach upset
  • May exacerbate existing heartburn or acid reflux
  • Could cause enamel erosion over time due to acid

Safer alternatives

  • Drink plain coffee without lemon
  • Use a small amount of honey for flavor
  • Opt for herbal or low-acid teas instead

Bottom line

If you’re acid-sensitive and the office only has lemons, adding lemon juice to coffee may increase the chance of stomach discomfort. Consider other flavoring options or keep the lemonade minimal, and pay attention to your body’s response.


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