Why Does Kiwi Burn My Tongue? Unveiling the Enigmatic Sensation

Have you ever experienced that peculiar tingling or burning sensation on your tongue after indulging in a delicious kiwi? The intriguing phenomenon of kiwi-induced tongue tingling has puzzled many, leaving them to wonder why this otherwise delightful fruit can cause such an unexpected reaction.

The secret lies in the unique enzymes present in kiwi’s flesh. The primary culprit responsible for this surprising sensation is actinidain, an enzyme that belongs to the cysteine protease family. Additionally, bromelain, another enzyme commonly found in pineapples, plays a supporting role in intensifying the overall experience.

Let’s uncover the intriguing science behind why kiwi burns our tongues and discover the numerous health benefits this exotic fruit offers.

Kiwi Burn Tongue

Why Does Kiwi Burn My Tongue?

Kiwis, with their vibrant green flesh and irresistibly sweet taste, are a popular choice among fruit lovers. However, it is not uncommon for some individuals to experience a tingling or burning sensation on their tongue and mouth after consuming this delectable fruit.

The main reason behind this intriguing phenomenon lies in the presence of specific enzymes and natural compounds in kiwi. Let’s explore them in detail.

1. The Role of Actinidain

Actinidain is a proteolytic enzyme found abundantly in kiwi fruit. It plays a crucial role in breaking down proteins, making it easier for our bodies to digest them.

However, actinidain is not limited to the digestive system; it also has an effect on our taste buds. When you consume a kiwi, the actinidain comes into contact with your tongue’s sensitive tissues, leading to the tingling sensation that some people experience.

2. Kiwi’s High Vitamin C Content

Kiwi is renowned for its exceptional vitamin C content, which is essential for a healthy immune system and overall well-being.

However, vitamin C is also known to trigger a mild allergic reaction in some individuals. This reaction can manifest as a tingling or burning sensation on the tongue, especially for those who have heightened sensitivity to vitamin C.

3. Presence of Serine Protease Inhibitors

Kiwi contains serine protease inhibitors, which are natural compounds that inhibit certain enzymes responsible for protein breakdown. While these inhibitors are beneficial in various ways, they can also contribute to the tingling sensation when they interact with the enzymes present in our mouths.

4. Organic Acids in Kiwi

Organic acids, such as citric acid and quinic acid, are found in kiwi fruit. These acids are responsible for the fruit’s refreshing tanginess.

However, when they come into contact with the delicate tissues of the tongue, they can cause a temporary stinging or burning sensation.

5. Oral Allergy Syndrome (OAS)

Some individuals may experience the burning sensation as a part of Oral Allergy Syndrome (OAS). This condition occurs when the proteins in kiwi (similar to those found in pollen) cross-react with the body’s immune system, leading to mild allergic reactions in the mouth and throat.

Read Also: Is Pre-Packaged Chicken Bad for You?

Expert Tips for Reducing the Sensation

Now that we understand the reasons behind the burning sensation, here are some expert tips to help reduce or minimize the discomfort:

  • Chew Slowly: Take your time when consuming kiwi to reduce the contact of the fruit’s enzymes with your tongue.
  • Rinse with Water: After eating kiwi, rinse your mouth with water to dilute the compounds causing the tingling sensation.
  • Peel the Kiwi: Consider peeling the kiwi before eating to reduce direct contact with the sensitive tissues of your mouth.
  • Cooked or Canned Kiwi: Opt for cooked or canned kiwi, as the heating process denatures enzymes and reduces their impact on your taste buds.
  • Pair with Dairy: Consuming kiwi with dairy products, such as yogurt, can help neutralize the enzymes responsible for the tingling sensation.
  • Consult an Allergist: If you suspect allergies are causing the burning sensation, consult an allergist for proper evaluation and advice.

The Benefits of Kiwi Enzymes

Despite the tongue-burning effect, kiwi enzymes offer numerous health benefits.

  • Digestive Aid: Actinidain, in particular, aids in digestion by breaking down proteins in the gastrointestinal tract. This property makes kiwi an excellent natural digestive aid, promoting a healthy gut.
  • Health and Nutrition: Kiwi is a nutritional powerhouse. Its abundance of vitamins, minerals, and antioxidants supports immune function, aids in collagen production, and may even improve sleep quality.

The Burstiness of Kiwi Flavor

Kiwi is not only known for its tongue-tingling quality but also for its burst of flavor.

  • Flavor Profile of Kiwi: The tangy and sweet flavor of kiwi is a delightful contrast that appeals to many palates. Its refreshing taste makes it a popular choice for fruit salads, smoothies, and desserts.
  • Bursting with Nutrients: Beyond the taste, kiwi boasts an impressive nutritional profile. From vitamin C to vitamin K and dietary fiber, this fruit offers a wide array of nutrients essential for overall health.


Let’s address some frequently asked questions related to the burning sensation caused by kiwi consumption:

Does everyone experience a burning sensation from eating kiwi?

No, not everyone experiences the burning sensation. It varies from person to person, and some individuals may be more sensitive to the compounds present in kiwi.

Are the compounds responsible for the burning sensation harmful?

No, the compounds responsible for the burning sensation are not harmful. They are natural components of kiwi and are generally considered safe for consumption.

Can children also experience the burning sensation from eating kiwi?

Yes, children can experience the burning sensation, although it might be more intense for them due to their delicate taste buds.

Can I prevent the burning sensation altogether?

While it may not be possible to entirely prevent the burning sensation, following the expert tips mentioned earlier can help minimize its intensity.


The mystery of why does kiwi burn my tongue has been unraveled. The combination of actinidain, vitamin C, serine protease inhibitors, organic acids, and possible allergies contributes to the tingling or burning sensation experienced by some individuals.

Keep in mind that this sensation is generally harmless and temporary. So, the next time you savor the delightful taste of a kiwi, embrace the unique experience, knowing that it’s a sign of the fruit’s natural goodness.

As with any dietary concerns or allergies, it is essential to listen to your body and seek professional advice if needed. Embrace the joy of kiwi while being mindful of your body’s responses. Happy kiwi-eating!