Is Coffee Acidic?

Is Coffee Acidic?

Coffee lovers often wonder — is coffee acidic? The answer is yes. Coffee naturally contains a variety of acids, but the level of acidity varies depending on the coffee beans, roast coffee, and brewing method. Understanding acidity helps you choose the right blend for your taste and avoid digestive discomfort such as acid reflux or a sour taste in your cup of coffee.

What Makes Coffee Acidic?

Acidity in coffee comes from natural organic acids found in the beans. These acids influence flavour, mouthfeel, and brightness:

  • Chlorogenic acid – contributes to bitterness, antioxidant properties, and how acidity changes during roasting.

  • Citric acid – adds a bright, fruity profile typical of African beans.

  • Malic acid – provides a crisp “green apples” style acidity.

  • Quinic acid – forms during roasting, sometimes associated with a slightly bitter finish.

Acidity is often perceived as a lively, bright characteristic rather than something that automatically causes stomach issues. Coffee’s acidity also sits on the pH scale at around 4.5–6, meaning it is mildly acidic but far less acidic than orange juice, soda, or vinegar.

Which Coffee Beans Are Most Acidic?

Higher acidity often comes from origin characteristics:

African Coffee (High Acidity)

These beans deliver floral, citrusy notes and vibrant flavours.

Central American Coffee (Medium Acidity)

Nutty undertones with moderate acidity.

South American Coffee (Low Acidity)

These beans will have your coffee tasting smooth, creamy, and gentle on the palate.

How Roasting Affects Acidity

Roasting significantly affects acidity in coffee:

  • Light roasts – retain the highest acidity; bright and fruity.

  • Medium roasts – balanced acidity and flavour.

  • Dark roasted or darker roasts – reduced acidity, richer body, deeper flavours.

Dark blends like Italian Blend Coffee or Continental Blend Coffee are lower in perceived acidity and gentler for sensitive stomachs.

Brewing Methods and Acidity

Your brewing method also impacts acidity:

  • Espresso – high pressure, slightly lower acidity than pour-over.

  • Filter coffee / Pour-over – highlights acidity, especially with lighter roasts.

  • French press – medium acidity with full-bodied flavour.

  • Cold brewed coffee – much lower acidity due to slow extraction.

For low-acid cold brew, try Frozen Amazon Coffee or Mayan Chill Coffee.

Health Effects of Coffee Acidity

Moderate coffee acidity isn’t harmful and can enhance flavour. However, high-acid coffee may cause:

  • Acid reflux

  • Stomach sensitivity

  • Discomfort when drinking black coffee on an empty stomach

How to Reduce Perceived Acidity

  • Choose medium or dark roasted beans

  • Brew using cold brew or French press methods

  • Avoid over-extraction

  • Pair coffee with food rather than drinking on an empty stomach

Which Coffee Is Low-Acid?

For smooth, low-acid options:

These selections are ideal for those sensitive to acids such as chlorogenic acid, malic acid, or quinic acid.

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