🥝 Kiwi — The Nutrient-Dense Powerhouse for Digestive and Immune Health

Introduction: A Vibrant Catalyst for Systemic Wellness

Kiwi (Actinidia deliciosa), also known as Chinese Gooseberry, is a vibrant fruit that contains a particularly high concentration of essential nutrients. Kiwi is one of the richest sources of vitamin C, compared to other fruits. In addition to a high amount of vitamin C, Kiwi contains a unique blend of enzymes, lutein, and fiber that aid in digestion, eye health, and free radical elimination. Kiwi is one of the most nutritious fruits, as it is packed with dietary fiber, vitamin C, and other healthy nutrients that support the human body.

Natural Dietary Sources and Varieties of Kiwi

There are several ways to enjoy this nutritional powerhouse:

• Green Kiwi — The most common variety, good for fiber and actinidin, a unique enzyme that aids digestion.

• Gold Kiwi — Similar to green, but sweeter and higher in vitamin C.
• Kiwi Berries — The grape-sized, fuzz-free baby kiwifruit, perfect for eating whole.
• The Skin — Most people do not eat the skin, but it is packed with fiber, so it is a good idea to eat it if you can tolerate the fuzzy texture. In fact, eating the skin will provide you with three times more fiber and vitamins that are right underneath the skin.

To get the most health benefits from kiwi, it is recommended to eat two pieces of this fruit per day. This dosage has been found to help with digestion, mood, and vitamin C levels.

Key Ways Kiwi Improves Health

1. Better Protein Digestion (Actinidin)

Kiwi fruit contains a unique enzyme, actinidin, that helps the human body to digest food. Specifically, actinidin breaks down dietary proteins, making them easier to absorb in the small intestine. The protein-digesting power of kiwi fruit is strong, as it can partially break down the proteins in meat, dairy products, and legumes. Moreover, kiwi fruit can help you feel less bloated after a heavy protein meal due to the activity of actinidin.

2. Immune System Support and Antioxidant Activity

Kiwi fruit is high in vitamin C, vitamin E, and polyphenols, which have a powerful antioxidant effect. Scientists have found that the regular consumption of kiwi fruit can reduce DNA damage and increase the overall number of immune cells, reducing the incidence of upper respiratory tract infections.

3. Heart and Cholesterol Health

Kiwi fruit is a natural blood thinner, as it reduces platelet aggregation and lowers triglyceride levels. Thus, eating 2-3 kiwis per day can reduce the risk of cardiovascular diseases. Kiwi fruit has a mild effect on blood clotting, meaning that it can have a similar effect to blood thinners but without the negative side effects.

Bioavailability & Practical Use

The nutrients in kiwi are easily absorbed and utilized by the human body. For instance, the vitamin C content in kiwi is as bioavailable as the synthetic form of this nutrient, but it comes with a bonus of other phytonutrients. Below are a few practical tips on how to enjoy kiwi fruit:

• Ripening: Kiwis should be left at room temperature until they soften a bit. Then, they should be stored in the fridge to prevent losing the delicate flavor and nutrients.
• Raw: Kiwi fruit should be eaten raw, as the enzymes and nutrients it contains are destroyed when it is heated.
• The Skin: The skin of kiwi is high in fiber and other nutrients, but it can be too fuzzy for some people. If the texture is unpleasant to you, you can try a “Gold” variety of kiwi, which does not have a fuzzy skin. Alternatively, you can remove the fuzz from a regular green kiwi with a towel and enjoy the healthy and tasty skin.

The recommended dosage of kiwi fruit for health benefits is about 2 medium-sized fruits per day. This amount has been found to improve respiratory and digestive tract health.

Dosing Guide & Practical Recommendations

• Green Kiwis: Eating 2 green kiwifruit per day can help with digestion and improve your gut health.
• Gold Kiwis: Eating 1-2 gold kiwifruit per day will give your body a significant amount of vitamin C. Specifically, 1 kiwi provides more than 200% of the daily value of vitamin C.
• Better Sleep: Eating 2 kiwis before going to bed can help you fall asleep faster, sleep longer, and improve your sleep quality. This benefit is due to the serotonin and folate content of this fruit.

Practical Tips

• Tenderizing Meat: You can use the flesh of the kiwifruit to tenderize meat, as it contains actinidin, which breaks down proteins. Soaking meat in mashed kiwi for about 20 minutes can make it more tender.
• No Mixing with Dairy: If you decide to mix kiwi with yogurt or other dairy products, you should eat it right away. The enzymes in kiwi will start breaking down dairy proteins, which can make the mixture bitter.
• Quality: When choosing kiwis, make sure to pick high-quality fruits. Ideally, buy organic kiwifruit if you plan on eating the skin, as it has a higher amount of nutrients.

Potential Interactions, Cautions & Who Should Consult a Doctor

• Latex Allergy: Kiwi fruit contains some latex proteins, making it possible for people with a latex allergy to be allergic to kiwi. If you have a latex allergy, it is better to avoid eating kiwi or consult a doctor about it.
• Kidney Stones: Kiwi fruit contains oxalates, making it possible for people with kidney stones to have complications. If you have a history of kidney stones, it is better to limit your kiwi consumption.
• Blood Thinners: Kiwi fruit acts as a mild blood thinner, meaning that it can thin the blood and prevent clotting. Thus, if you are on blood thinning medications, such as Warfarin or Aspirin, it is better to consult your doctor about eating kiwi.
• Before Surgery: Due to its blood-thinning properties, kiwi should be avoided before surgery. Ideally, you should stop eating kiwi at least two weeks before a planned surgery.

Note: If you are on any chronic medications or have any health conditions, consult your doctor before eating kiwi. This article only provides general information about the health benefits of kiwi and should not be used as medical advice.

Conclusion & Future Directions

Kiwi fruit is not only a pretty decoration for your breakfast, but it also contains nutrients that can improve your heart and digestive tract health. Kiwi can even help you sleep better and feel less bloated after eating heavy meals. Thus, kiwi is a true “lifestyle fruit” that can improve several areas of your health at once. Moreover, kiwi fruit can be used in various ways in your daily diet. The next time you go shopping, do not forget to pick some kiwis! Scientists are currently studying the health benefits of kiwi, specifically its effects on the human gut. In particular, researchers are interested in the connection between kiwi and mental health.

📚 References (Kiwi / Actinidin / Vitamin C & Digestive Health)

1. Richardson DP, Ansell J, Drummond LN. The nutritional and health attributes of kiwifruit: a review. European Journal of Nutrition. 2018;57(8):2659-2676. doi:10.1007/s00394-018-1627-z
2. Boland M. Kiwifruit proteins and enzymes: actinidin and other proteases. Advances in Food and Nutrition Research. 2013;68:59-80. doi:10.1016/B978-0-12-394294-4.00004-3
3. Stonehouse W, et al. Kiwifruit: our daily prescription for health. Canadian Journal of Physiology and Pharmacology. 2013;91(6):442-447. doi:10.1139/cjpp-2012-0303
4. Lin HH, et al. Effect of kiwifruit consumption on sleep quality in adults with sleep problems. Asia Pacific Journal of Clinical Nutrition. 2011;20(2):169-174.
5. Hunter DC, et al. Consumption of gold kiwifruit reduces severity and duration of selected upper respiratory tract infection symptoms and increases plasma vitamin C concentration in healthy older adults. British Journal of Nutrition. 2012;108(7):1235-1245.