Written through Daniel Preiato, RD, CSCS top top November 6, 2019 — medically reviewed by Adda Bjarnadottir, MS, RDN (Ice)

As one of the most famous beverages in the world, coffee is below to stay.

You are watching: Is coffee an acid or base

Still, even coffee lovers might be curious around whether this beverage is acidic and also how its mountain may impact their health.

This post reviews whether coffee is acidic, its impacts on certain health conditions, and some means to modify its acidity.

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In general, acidity is established using the pH scale, which specifies how basic or acidic a water based equipment is. The scale varieties from 0 come 14. Any kind of solution registering from 0 come 7 on the range is taken into consideration acidic, whereas a systems registering from 7 come 14 is considered an easy (1).

Most coffee ranges are acidic, with an typical pH value of 4.85 come 5.10 (2).

Among the numerous compounds in this beverage, the brewing process releases nine major acids that contribute to its distinct flavor profile.

Here space the nine major acids in coffee, listed from greatest concentration come lowest: chlorogenic, quinic, citric, acetic, lactic, malic, phosphoric, linoleic, and palmitic (3).


The brewing procedure releases acids from coffee beans, providing this beverage a pH the 4.85 come 5.10, i beg your pardon is considered acidic.

Variations in mountain

When it involves the mountain of coffee, several determinants can pat a role.


One main facet that identify the mountain of coffee is exactly how it’s roasted. Both roasting duration and temperature have actually been correlated with acidity.

One study proved that the longer and also hotter coffee beans were roasted, the reduced their chlorogenic acid levels (4).

This suggests that lighter roasts tend to be greater in acidity, if darker roasts room lower.


Another element that affects mountain is the imminent method.

One study discovered that cold-brewed coffee was considerably lower in acidity than warm coffee (2).

Brewing time likewise appears to influence overall acidity, v a shorter duration causing a more acidic beverage and a moderate duration resulting in a much less acidic one (5).

Ground size

The size of the coffee grounds have the right to also impact acidity. The smaller sized the ground, the greater the surface area exposed family member to volume, which deserve to lead to an ext acid gift extracted in the brewing procedure (5).

Therefore, making use of a finer grind may result in a an ext acidic cup that coffee.


Several factors add to coffee’s acidity. The main ones are the roasting duration, brewing method, and fineness of the grind.

While coffee’s mountain is well for most people, it might aggravate details health problems in others.

These problems include mountain reflux, gastric ulcers, and irritable bowel syndrome (IBS). Coffee’s results on these problems are largely attributed to its acidity and slight laxative effect in some civilization (6, 7, 8).

Coffee has actually not been displayed to cause these conditions. However, if you have been diagnosed with among them, it’s regularly recommended to protect against coffee (4, 9).

Alternatively, some people may benefit from merely opting for less acidic varieties.

Ways to alleviate acidity

The mountain of coffee may be limiting for some. Here are a few ways to minimize it (2, 10):

Choose dark end light roasts.Drink cold brew instead of hot.Increase brew time, such as by making use of a French press.Opt because that a coarser grind.Brew at a reduced temperature.

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Because coffee is acidic, it may impact particular health conditions, such as mountain reflux and also IBS. Thus, some world may need to avoid it. Back the mountain of this beverage cannot be eliminated, there room several means to minimize it.