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All You Need to Know About Oxalate in Apples

Lady holding three apples

People love apples for their crunchy and sweet-tangy taste. They have many types, each with distinct flavours and health perks.

You can snack on apples for a healthy treat or cook/bake with them. But are they suitable for a low-oxalate diet? 

Oxalate Content in Apples

Apples are low-oxalate, a safe choice for reducing intake. Enjoy apples without worry, regardless of the variety. Granny Smith, Fuji, and Gala - are all good for low-oxalate diets. This is great news for apple lovers!

Understanding Oxalates in Apples and Their Impact on Health

Apples, like many other plant foods, contain dietary oxalates, specifically oxalic acid. Even though apples are considered low in oxalate content, it’s important to be mindful of their oxalate levels. Especially if you’re following an oxalate diet.

Some people may be watching their oxalate intake due to health concerns. Health concerns such as calcium oxalate kidney stones. For these people, monitoring the amount of oxalates consumed is crucial.

Apples provide many nutrients and benefits as part of a healthy diet. But watching your overall oxalate intake can help manage and reduce the risk of kidney stone formation.

The Role of Oxalates in Kidney Stone Formation

Oxalates play a significant role in the formation of kidney stones.. Especially calcium oxalate stones, which are the most common type of kidney stones. Oxalates can bind with calcium in the urinary tract. This can form calcium oxalate crystals that may develop into stones.

This process is influenced by the concentration of oxalates in the diet.

It is also influenced by their absorption by the body. Foods like mustard greens and spinach are high-oxalate foods. Apples are a low-oxalate food. This makes them a safer choice for those concerned with oxalate excretion and stone formation.

Oxalate Absorption and Health Implications

The absorption of oxalates in the intestines can vary widely. It depends on several factors, including the type of food, the individual's health condition, and the presence of calcium. In healthy individuals, the majority of oxalates are excreted. Excretion happens through urine without causing harm.

Excretion isn't as simple for people with conditions like chronic kidney disease or metabolic diseases. Their body's ability to process and excrete oxalates may be limited. This could lead to higher risks of oxalate-related health issues. To reduce the risk they need to manage their consumption of oxalate-rich foods. Drinking enough water and balancing oxalate intake with adequate calcium intake can help. It can reduce the formation of calcium oxalate crystals.

Does the Preparation Method Change Oxalate in Apples?

The oxalate content in apples is low. It stays consistent through various preparation and eating methods. Let's take a quick look:

  • Raw vs. Cooked: Cooking can reduce oxalate in some foods, but not apples. Apples have low oxalate levels and cooking doesn't change much.

  • Peeling: Removing apple skin won't affect oxalate levels. Apple skin is rich in nutrients and fibre but low in oxalates. Apples keep their skin today.

  • Juicing: Juicing apples removes fibre. Oxalate content stays as oxalates are water-soluble.

Comparison Table: Oxalate Content in Apples and Common Fruits

Please research and speak to a medical professional before making dietary changes. I have listed the sources I use in the Resource Library. I am not a medical practitioner, just someone trying to raise awareness.

Here is a comparison table based on OHF for apples and oranges:


Average Ox (mg) per 100 g

Serving Size

Serving Size (g)

Calc Oxalate per serving

Oxalate level

Apple, Apple Puree


1/2 cup




Apple, Variety, Fresh


1 medium




Orange, Mandarin or Clementine, fresh or canned


1 medium or 1/2 cup




Oranges, fresh, variety


1 medium




Environmental Considerations

When considering oxalate consumption, it's important to be aware of the primary sources of oxalates. Factors such as soil conditions and time of harvest can influence the oxalate content in foods. For example, plant sources grown in oxalate-rich soil may have higher levels of oxalic acid. It is for this reason that databases and other resources that give you oxalate content should be used as guides only.

The Nutritional Benefits of Apples Despite Oxalates

Despite their oxalate content, apples offer many health benefits. They are a rich source of vitamins and fibre. Apples have antioxidant properties and anti-inflammatory properties. Both contribute to their positive impact on human health.

Apples support cardiovascular health. They improve gastrointestinal health and may help reduce the risk of chronic diseases. Including apples in your diet can provide essential nutrients. Just be sure not to eat too much if you have pre-existing conditions that make you sensitive to oxalate intake.

Health Benefits of Apples

Apples, besides being low in oxalates, have many health perks. They provide fibre for digestion and feeling full. Also, they pack vitamin C, antioxidants, and phytonutrients. These support heart health, prevent diseases and boost well-being. You've heard it right: "An apple a day..."

Here is a list of some of the potential health benefits:

  • Nutrient-Rich

  • High in Fiber

  • Weight Management

  • Heart Health

  • Reduced Risk of Diabetes

  • Cancer Prevention

  • Gut Health

  • Brain Health

  • Bone Health

Incorporating Apples into Your Diet

With their low oxalate content and nutritional value, apples are versatile. You can enjoy them as a snack, in salads, desserts, or savoury dishes. They're perfect for adding sweetness to smoothies and oatmeal.

Managing Oxalate Intake Through Diet

For people at risk of kidney stone formation or who have inflammatory bowel disease, managing daily oxalate intake is important. Oxalate-rich foods should be consumed in moderation or avoided. Oxalate fruits, like apples, can help maintain a balance as they are low in oxalate.

A low-oxalate diet involves monitoring and adjusting the intake of oxalate from various plant sources. Pairing oxalate-rich foods with calcium-rich foods or plant-based dairy products can help bind oxalates in the digestive system and reduce their absorption.

Oxalates in Foods and Their Dietary Management

Understanding the oxalate content in foods is crucial. It can help in managing dietary intake. Especially for those at risk of kidney stone formation or who have other oxalate-sensitive conditions. The measurement of oxalates in foods can help people. It gives people the freedom and the power to make informed dietary choices.

Apples and a wide variety of other fruits and vegetables contain detectable oxalate levels. This doesn't make them 'bad food'. You just need to be mindful. Being mindful of oxalate per cup can assist in planning a balanced diet that minimizes health risks. Without being mindful, you are at risk of excess oxalate intake.


Apples are a healthy, low-oxalate fruit choice. They're versatile and nutritious. They fit well in a balanced low-oxalate diet. For personalised advice, consult with a healthcare provider. Enjoy them in a well-rounded diet for overall health.

To find out more about oxalate in greens, read Arugula Oxalates Rocket.


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