Are Red or Green Apples Ok on The Candida Diet?

Posted 1/14/2021

Written by Dr. Brittany Buysschaert, PhD

A lunchbox favorite, apples (Malus domestica) are the fruit of the apple tree. They were first grown in Central Asia, and their wild ancestor Malus sieversii still grows there to this day. Apples were domesticated approximately 5000 years ago. They have been cultivated in both Asia and Europe for thousands of years. Apples traveled to these locations via the Silk Road. When apples arrived in Europe, they were crossbred with native crabapples. There are still apple cultivars in Europe today which are more related to crabapples than Malus sieversii for this reason. Early American settlers brought apple seeds with them when they crossed the Atlantic. The first apple orchard in America was located in Massachusetts in the early 1600s.

The size of mature apple trees is dependent on how the tree was planted. Apple trees grown from seeds are large, so most commercially grown apples are propagated by grafting onto rootstock, which yields a tree of a more manageable size. Wild apple trees can be up to 30 feet tall, whereas most cultivated apple trees are about 10 feet tall. There are over 7000 kinds of apples, and most apple trees can produce 200 pounds of fruit per year once they reach maturity. The worldwide production of apples is approximately 85 million metric tons, with 45% of apples coming from China. China is also the largest exporter of apples, and is responsible for 18% of global exports. The largest producer of apples within the United States is Washington State; apples are the largest product of the state’s economy. Commercial apples are stored in high carbon dioxide environments with lots of air flow to ensure ethylene doesn’t build up. Ethylene is the compound which ripens fruit, including apples.

Apples have significance in many cultures and myths. In Norse mythology, apples were given to the gods for eternal youthfulness. They are also a symbol of fertility in Norse myths. In Ancient Greece apples were thrown at a potential love interest—the love interest caught the apple if they were interested in you as well. The apple is also an important part of Christian tradition with the story of Adam and Eve. One confounding issue with the historical significance of the apple is that many different fruits were translated to apple. Thus, not all of the myths and traditions may actually be referring to the fruit we now call an apple.


Nutrient Profile of Apples

One medium apple (200 grams) contains 105 calories. Apples are a good source of Vitamin C and a significant source of carbohydrates and fiber.


One large apple contains 28 grams of carbohydrates, including 21 grams of sugar. In spite of its sugar content, apples are considered a low glycemic food with a glycemic index of 38.


One apple contains 5 grams of fiber. Apples contain approximately 2/3 insoluble fiber and 1/3 soluble fiber, with most of the fiber content coming from the apple peel. Insoluble fiber can be helpful in preventing constipation and promotes regular bowel movements. Soluble fiber also aids in healthy bowel movements, can help lower cholesterol, and helps diabetics maintain blood glucose levels.


Apples are not a significant source of protein, with 0.5 grams of protein per serving.


Apples are not a significant source of fat, with 0.5 grams of fat per serving.

Vitamins & Minerals

Apples are a good source of Vitamin C, with 10% of the FDA recommended daily value in each serving. Apples are not a significant source of any minerals.

Antioxidants in Apples

The most prominent and important antioxidant in apples is quercetin. Apples also contain significant quantities of chlorogenic acid, catechin, and phloridzin (1). The precise antioxidant makeup of an apple as well as antioxidant concentration is dependent upon the cultivar and whether the apple is cooked or raw (1). There are not significant changes in apple antioxidant concentrations based on how long apples are stored (1). Apples have the highest antioxidant concentration among the most commonly consumed fruits in the United States (1). Apples contain more antioxidants than oranges, grapes, strawberries, and bananas (1). The antioxidants in apples are largely not bound to other compounds, making them more available to the body compared to the antioxidants in other fruits (2). The presence of significant quantities of quercetin in apples gives apples the majority of its health benefits, which will be discussed in detail below.

1. Boyer, J., Liu, R. H. (2004). Apple phytochemicals and their health benefits. Journal of Nutrition, 3(5),

2. Sun, J., Chu, Y. F., Wu, X., & Liu, R. H. (2002). Antioxidant and antiproliferative activities of common fruits. Journal of Agricultural and Food Chemistry, 50(25), 7449-7454.

Health Benefits of Apples

Reduced Lung Cancer Risk

Apple consumption is associated with reduced risk of lung cancer. In one study, women who consumed at least one apple per day had a significantly reduced risk of lung cancer (3). Another study showed a 40% reduction in lung cancer risk for both mean and women who consumed the highest amount of apples and onions (4). The link between apples and onions are that they are the most commonly consumed foods which contain large quantities of quercetin. A Finnish study showed an association between flavonoid intake and reduced risk of lung cancer (5). Quercetin accounted for 95% of flavonoids consumed, and the majority of this quercetin came from eating apples and onions (5).

Reduced Cardiovascular Risks

Consumption of apples is beneficial in reducing cardiovascular risks. One study found that women who consumed the greatest amount of apples had a 20% reduction in cardiovascular issues (6). Another study showed that apple and onion intake was associated with decreased risk of coronary mortality and stroke (7).

Reduced Asthma and Benefits to Lung Function

Eating apples is associated with reduced incidence of asthma. High apple intake is associated with a lower risk of asthma in Australia (8) and the United Kingdom (9). Eating five or more apples per week has positive effects on lung function (10).

3. Feskanich, D., Ziegler, R. G., Michaud, D. S., Giovannucci, E. L., Speizer, F. E., Willett, W. C., & Colditz, G. A. (2000). Prospective study of fruit and vegetable consumption and risk of lung cancer among men and women. Journal of the National Cancer Institute, 92(22), 1812-1823.

4. Le Marchand, L., Murphy, S. P., Hankin, J. H., Wilkens, L. R., & Kolonel, L. N. (2000). Intake of flavonoids and lung cancer. Journal of the National Cancer Institute, 92(2), 154-160.

5. Knekt, P., Järvinen, R., Seppänen, R., Heliövaara, M., Teppo, L., Pukkala, E., & Aromaa, A. (1997). Dietary flavonoids and the risk of lung cancer and other malignant neoplasms. American Journal of Epidemiology, 146(3), 223-230.

6. Sesso, H. D., Gaziano, J. M., Liu, S., & Buring, J. E. (2003). Flavonoid intake and the risk of cardiovascular disease in women. The American Journal of Clinical Nutrition, 77(6), 1400-1408.

7. Knekt, P., Isotupa, S., Rissanen, H., Heliövaara, M., Järvinen, R., Häkkinen, S., ... & Reunanen, A. (2000). Quercetin intake and the incidence of cerebrovascular disease. European Journal of Clinical Nutrition, 54(5), 415-417.

8. Woods, R. K., Walters, E. H., Raven, J. M., Wolfe, R., Ireland, P. D., Thien, F. C., & Abramson, M. J. (2003). Food and nutrient intakes and asthma risk in young adults. The American Journal of Clinical Nutrition, 78(3), 414-421.

9. Shaheen, S. O., Sterne, J. A., Thompson, R. L., Songhurst, C. E., Margetts, B. M., & Burney, P. G. (2001). Dietary antioxidants and asthma in adults: population-based case–control study. American Journal of Respiratory and Critical Care Medicine, 164(10), 1823-1828.

10. Butland, B. K., Fehily, A. M., & Elwood, P. C. (2000). Diet, lung function, and lung function decline in a cohort of 2512 middle aged men. Thorax, 55(2), 102-108.

Negative Health Effects of Apples

There are very limited negative health effects of apples. Although uncommon, some individuals can be allergic to apples. Most allergic individuals are of European ancestry. The main allergic reaction is called oral allergy syndrome. This mild allergic reaction generally involves itching and swelling in the mouth but no anaphylaxis or other life threatening symptoms. The protein responsible for oral allergy syndrome is deactivated by heating, so only raw apples elicit the allergic response. An even less common but more severe allergy is known mainly amongst individuals of Mediterranean descent. This allergy is to both raw and cooked apples and can be life threatening. Apple seeds contain minute amounts of cyanide. Even if apples seeds are accidentally consumed, cyanide poisoning is not possible as a very large number of seeds would need to be eaten to cause cyanide poisoning or death.

Apples on The Candida Diet

This nutrition information is provided by the USDA for one medium-sized (182g) apple (3” in diameter).1

Calories: 95

The glycemic index for an apple runs about 34 to 38 which is low. With a GI of 38 and 25g of carbs you get a glycemic load of 9.5, which is on the high side of low. However, some websites claim apples only have 13g of carbs and a glycemic load of 5.

What About Red vs Green Apples?

Red apples have more anthocyanin, which is a flavonoid that gives red apples that red color. Red Delicious apples contain nearly five times as much anthocyanins as Granny Smiths. Green apples have slightly more fiber, potassium, and vitamin K, B, and C. Green apples have a little less carbs and sugar but not by much, less than 1g which is insignificant.

There is no medical proof that green apples have antifungal effects. However, Apple Cider Vinegar most certainly does have antifungal effects.(Source)

The question though is can you eat apples on the Candida diet? Because apples have a low glycemic index, ample fiber that helps prevent constipation, promotes bowel movements while feeding your good bacteria, a couple apples a week are probably not going to hurt you. The natural sugars should not be an issue and cause blood sugar spikes, if they did the glycemic load of an apple would be much higher.

If however, apples give you a problem, especially bloating, and you have not tested yourself to see if you do have a Candida yeast infection in your gut, because apple fiber is good food for bacteria, more than likely you have an over growth of bad bacteria.

If they don't cause issues, make sure you add the carb amounts to your daily total and shoot for 50 to 60 grams a day so you can keep your immune system functioning at its best.

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If you have any questions about anything concerning foods on the candida diet or about yeast infections in general, please feel free to contact us from the contact page of this website or talk to your doctor.

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