Is the Chemical Acrylamide in Coffee Harmful to Your Health?
The health benefits of drinking coffee are pretty impressive.
However, coffee also contains a potentially harmful chemical called acrylamide.
What is Acrylamide?
The chemical acrylamide (or acrylic amide) is a white, odorless, crystal compound. It has the chemical formula C3H5NO.
It's used to make plastics and treat waste water, among other things.
Day-to-day we are exposed to acrylamide through smoking and secondhand smoke, as well as personal care products and household items.
In 2002, Swedish scientists also discovered it in a wide range of foods, including baked goods and coffee (16).
What we do know is that when coffee beans are roasted, acrylamide is formed. There's no way to remove acrylamide from coffee, so when you drink it, you're exposing yourself to the chemical (19).
Bottom Line: Acrylamide is a potentially harmful chemical formed during the coffee bean roasting process.
Is Acrylamide Really Harmful?
Acrylamide can definitely be harmful.
Yet, as is often the case in nutrition, the devil is in the dose.
Studies in animals have also repeatedly shown that acrylamide causes cancer when eaten.
However, the doses given to animals have been 1000–100,000 times larger than the amounts humans are exposed to through diet.
Humans also metabolize acrylamide differently, so we are exposed to a lower dose of the chemical when our body breaks it down (20).
Unfortunately, there are few human studies on the safety of acrylamide in food and the results have been inconsistent (21).
It's also important to keep in mind that acrylamide is not a new problem. Despite only recently being discovered in our food, it's likely to have been there in some amount since man started cooking.
Bottom Line: Workplace exposure to high amounts of acrylamide can cause nerve damage. In very high doses, acrylamide is known to cause cancer in animals. We don't know how much of it is safe for humans.
How Much Acrylamide Does Coffee Contain?
The amount of acrylamide in coffee varies greatly.
A 2013 study analyzed 42 samples of coffee, including 11 instant coffees and three coffee substitutes (grain coffee).
They found instant coffee to have 100 percent more acrylamide than fresh roasted coffee, while coffee substitutes had 300 percent more (22).
They also noted that acrylamide levels peak early in the heating process and then decline. So lighter colored coffee beans have more acrylamide than darker ones that are roasted longer.
Bottom Line: The amount of acrylamide in coffee can vary greatly. Well roasted, dark, fresh coffee beans are likely to have the lowest amount.
Is Drinking Coffee Risky?
While a link between acrylamide intake and cancer in humans hasn't been proven, it cannot be ruled out.
However, coffee drinking has not been shown to increase your risk of cancer. In fact, it's linked with a reduced risk of developing some types of cancers (23).
For example, in one study, people who increased their coffee intake by 2 cups per day had a 40 percent lower risk of liver cancer (24).
Coffee drinking is also linked to a plethora of other health benefits, such as living longer and a reduced risk of many diseases.
Bottom Line: Coffee hasn't been shown to increase your risk of cancer. It has actually been linked with a reduced risk of some types of cancers, such as liver cancer.
Should You Stop Drinking Coffee to Avoid Acrylamide?
Avoiding acrylamide completely is not possible.
At the moment we consume less acrylamide than the maximum exposure levels recommended by the European Food Safety Authority (25).
Given the potential health benefits of coffee, it's not something you need to cut out.
Bottom Line: Coffee contains many other chemicals that may be beneficial to your health; cutting it out isn't necessary.
How to Minimize Your Acrylamide Exposure
There is no evidence that small amounts of dietary acrylamide cause harm.
However, if you are concerned, then here are a few steps you can take to minimize your exposure:
- Quit smoking and try to minimize your exposure to secondhand smoke.
- Keep frying to a minimum, as it produces the most acrylamide of all cooking methods.
- Try not to burn or char foods on the grill.
- Toast bread to a light brown color and avoid burnt toast.
- Boil or use the microwave when possible.
- Let your bread dough proof longer—the fermentation of yeast reduces the amount of asparagine in the dough, so less acrylamide is made (29).
- Choose dark roasted coffee and avoid instant coffee and coffee alternatives.
Bottom Line: Completely avoiding acrylamide is impossible. However, you can make a few changes to reduce your acrylamide intake.
Take Home Message
Coffee contains various substances that are linked to positive effects on health.
These outweigh the potential negative effects of acrylamide, so there's no need to stop drinking coffee if you enjoy it.
This article was reposted from our media associate Authority Nutrition.
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