Are there any side effects of eating kakadu plums?

December 20, 2025 •

3 min read

The kakadu plum, a native Australian superfood, boasts the highest natural concentration of Vitamin C in the world, containing up to 100 times more than oranges. However, this potent nutrient profile also introduces potential side effects if consumed in excess, including gastrointestinal discomfort and risks associated with high oxalate content.

Quick Summary

Excessive intake of kakadu plums can lead to vitamin C overdose symptoms like nausea, diarrhea, and abdominal cramps. It also contains high levels of oxalates, which can pose a risk for those with kidney issues. Proper consumption and moderation are key to enjoying its benefits.

Key Points

Moderate Intake: Excessive consumption of kakadu plums, especially in powdered form, can lead to vitamin C overdose symptoms like diarrhea and nausea.
Oxalate Risk: The fruit's high oxalate content can interfere with calcium absorption and may pose a risk for individuals with a history of kidney stones or kidney disease.
Avoid Seeds: Some sources suggest that kakadu plum seeds may be toxic and should be avoided.
Consider Pre-existing Conditions: Individuals with kidney issues, gastrointestinal diseases, or other sensitive conditions should consult a doctor before consuming.
Allergic Reactions: Though rare, allergic reactions like itching or swelling can occur, and consumption should be stopped immediately if experienced.
Proper Preparation: To preserve the vitamin C content, it is best to add kakadu plum powder to cold foods and drinks, as heat can diminish its potency.
Stay Hydrated: Drinking plenty of water is recommended to help the body process the high vitamin C intake and flush out excess amounts.
Nutrient Comparison: Compared to other vitamin C sources like oranges, the kakadu plum is significantly more potent, making moderation even more critical.

Understanding the Potential Risks of Kakadu Plum

While celebrated for its nutritional benefits, particularly its exceptionally high vitamin C content and rich antioxidants, consuming kakadu plums, especially in concentrated forms like powders, is not without potential risks. The primary concerns revolve around overconsumption, the presence of specific compounds, and individual sensitivities. As with any potent food, moderation is essential for safety and reaping the health rewards without adverse effects.

Overconsumption and Vitamin C Toxicity

Kakadu plum is an immune-boosting powerhouse due to its vitamin C concentration, but the very quality that makes it a 'superfood' can become a liability with excessive intake. The recommended daily intake of vitamin C is far exceeded by even a small serving of kakadu plum powder. This can lead to what is known as vitamin C overdose, though symptoms are typically not life-threatening. The main side effects include:

Diarrhea
Nausea and vomiting
Heartburn
Abdominal cramps
Headaches

These symptoms occur because the body cannot process the excessive amounts of the water-soluble vitamin, leading to digestive distress. For most healthy individuals, these effects subside once consumption is reduced. However, those with pre-existing conditions should exercise greater caution.

Oxalate Content and Kidney Concerns

Another crucial factor to consider is the high oxalate content in kakadu plums. Oxalates are naturally occurring compounds found in many plants, and in high concentrations, they can interfere with the body's ability to absorb calcium. For individuals with a history of kidney stones or kidney disease, excessive oxalate intake is a serious concern, as it can contribute to the formation of kidney stones. To mitigate this risk, it is recommended to consume kakadu plum in small, controlled portions and ensure adequate water intake.

Specific Precautions for At-Risk Individuals

Certain individuals should be particularly careful when adding kakadu plums to their diet. Those with kidney diseases, ulcerative colitis, Crohn's disease, hyperparathyroidism, or renal tubular acidosis should consult a healthcare professional before consuming kakadu plums due to the high vitamin C and oxalate content. Furthermore, some sources suggest that the fruit's seeds might be toxic and should be avoided.

A Comparison of Kakadu Plum and Other Vitamin C Sources

To put the potency into perspective, it's helpful to compare kakadu plum to other common sources of vitamin C. This illustrates why moderation is so important.


Feature	Kakadu Plum Powder	Orange	Acerola Cherry Powder	Rosehip Powder
Vitamin C Content (per 100g)	~7000 mg	~53 mg	~1700 mg	~426 mg
Recommended Serving Size	1/4 teaspoon	1 whole fruit	1-2 teaspoons	1-2 teaspoons
Potency	Extremely high	Moderate	Very high	High
Oxalate Content	High	Low	Moderate	Low
Risk of Overdose	Significant with excess	Very low	Moderate with excess	Low

This table highlights the sheer difference in vitamin C concentration, emphasizing why the small recommended serving size for kakadu plum powder must be respected.

Gastrointestinal Upset and Allergic Reactions

Beyond the risks of vitamin C and oxalates, some individuals might experience other side effects, including general gastrointestinal upset or allergic reactions. Symptoms can include stomach ache, nausea, or a laxative effect, particularly with excessive intake of the fresh fruit. Allergic reactions are uncommon but can occur, manifesting as itching, redness, or swelling. Anyone experiencing an unpleasant reaction should stop consumption immediately. Individuals with known allergies to other fruits should proceed with caution.

Safe Consumption and Preparation

To enjoy kakadu plums safely, it is best to stick to the recommended serving sizes for supplements like powder, which is typically a quarter teaspoon per day. Adding it to cold beverages or foods like smoothies, yogurt, or cereals is a great way to incorporate it without diminishing its nutritional value, as heat can destroy the vitamin C. Always start with a small amount to see how your body reacts before increasing intake. For more information on ethical sourcing and its traditional significance, one can explore sources like the Indigenous Land and Sea Corporation to ensure responsible consumption.

Conclusion: Balance is Key

While the kakadu plum is an undeniable nutritional powerhouse, understanding its potential side effects is vital for safe consumption. The risks associated with high doses of vitamin C and high oxalate levels are real, particularly for sensitive individuals or those with certain health conditions. By consuming kakadu plums in moderation, staying well-hydrated, and being mindful of your body's unique response, you can safely enjoy the immense benefits of this traditional Australian superfood.

Frequently Asked Questions

Yes, excessive consumption of kakadu plums can lead to gastrointestinal issues such as diarrhea, nausea, and abdominal cramps due to the high concentration of vitamin C.

Yes, kakadu plums are high in oxalates, which can interfere with calcium absorption and contribute to kidney stone formation. People with kidney problems should limit their intake and consult a doctor.

No, some sources suggest that the seeds of kakadu plums can be toxic and may cause illness. It is best to avoid consuming the seeds.

An overdose of vitamin C from excessive kakadu plum consumption can cause digestive issues like heartburn, nausea, and diarrhea, though it is not typically life-threatening.

While uncommon, allergic reactions to kakadu plums can occur. Individuals with known allergies to other fruits should proceed with caution and consider a patch test before regular consumption.

You can, but it is not recommended if you want to maximize the vitamin C benefits, as heat can destroy this nutrient. Adding the powder to cold foods and drinks is ideal.

Due to its high potency, a quarter teaspoon of kakadu plum powder per day is generally recommended. Always start with a smaller amount to gauge your body's reaction.