CLAIM:
Eating dry fruits 'randomly' can increase the risk of kidney stones because they are high in oxalates, which may bind with calcium and form stones. It also claims that compounds like phytates in dry fruits can block mineral absorption, leading to nutrient deficiencies, and therefore, they should be consumed in a specific pattern.
FACT:
There is no scientific evidence that eating dry fruits ''randomly' causes kidney stones or nutrient deficiencies. While dry fruits contain oxalates, the risk depends on overall intake, diet, hydration, and individual susceptibility—not timing or fixed consumption patterns. In moderation, dry fruits are considered safe and part of a balanced diet.
In a viral Instagram reel posted by fitness coach and influencer Priyank Mehta, a common dietary habit - eating dry fruits - is put under scrutiny.
He suggests specific ways to include them in the diet, saying, “Almonds and raisins - about 5 to 7 - should be soaked and eaten every morning on an empty stomach. Eat soaked figs as a mid-morning snack, and have walnuts in the evening to boost brain health.”
What does research say?
Research suggests that while dry fruits contain oxalates and can influence oxalate levels when consumed in excess, they are just one part of a much larger dietary picture. Kidney stone risk depends on multiple factors, including hydration, overall diet, and individual susceptibility—not whether dry fruits are eaten 'randomly' or at specific times of the day.
According to a 2005 study, a large proportion of kidney stones are linked to oxalates. The researchers noted, “About 75 per cent of all kidney stones are composed primarily of calcium oxalate and hyperoxaluria is a primary risk factor for this disorder.”
The study further analysed oxalate content in everyday foods and found that nuts are among the richest sources. “The range of total oxalate of the nuts tested was 42–469 mg/100 g… The overall data suggested that most legumes, nuts, and flours are rich sources of oxalate.”
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This supports the idea that dry fruits do contain oxalates—but it does not establish that normal consumption leads to stones.
Some research has looked at what happens when intake becomes excessive. A 2020 case study described a rare instance of oxalate-related kidney damage in a patient consuming extremely high amounts of nuts daily. The report noted that the individual’s diet included “six tablespoons of chia seeds and five handfuls of almonds daily”, which led to increased urinary oxalate and kidney complications. After switching to a low-oxalate diet, the patient’s condition improved. The authors emphasised that such cases are uncommon and highlight the risks of very high, prolonged intake, not routine eating habits.
Building on this, broader research shows that kidney stone formation is influenced by overall diet and lifestyle—not just one food group. A 2020 review on nephrolithiasis highlights that “nephrolithiasis is a common medical condition influenced by multiple environmental factors, including diet,” and that dietary changes are a key part of prevention. The review emphasises that guidelines focus on increasing fluid intake, maintaining balanced calcium levels, and reducing sodium and animal protein intake. Importantly, it notes that “high meat/animal protein intake and low calcium diets” are consistently associated with a higher risk, whereas “a balanced vegetarian diet with dairy products seems to be the most protective diet for kidney stone patients.”
The same review also places oxalates in context. It explains that oxalate is widely present in foods—“including… nuts, tea, chocolate, and rhubarb” - making it difficult to eliminate entirely. As a result, dietary restriction is generally recommended only in cases of excessive intake of high-oxalate foods, rather than normal consumption.
More recent research further complicates the narrative around dry fruits. A 2024 study using Mendelian randomisation methods found that higher dried fruit intake was associated with improved kidney function markers under certain conditions. The authors reported that “dried fruit intake has potential preventive value for increased BUN, CR, UA, and CysC levels,” suggesting a possible protective role. However, they also cautioned that these effects may weaken when factors like smoking and alcohol consumption are considered, and stressed that more clinical research is needed to confirm these findings.
At the same time, controlled dietary studies show that quantity still matters. A 2025 study examining oxalate excretion found that consuming almonds led to a “consistent and significant” rise in urinary oxalate levels. This suggests that large amounts of certain nuts may increase stone-forming risk in susceptible individuals—but again, this was observed under high intake conditions, not routine dietary patterns.
What experts say?
Prof. Dr Sanjeev Bagai, Padma Shri awardee and Senior Consultant Paediatrician & Nephrologist, said that dry fruits are a healthy part of the diet when consumed appropriately. He emphasised that moderation, not timing or rigid patterns, is what matters most.
“Dry fruits are always a useful and essential part of a balanced diet. Anything eaten in moderation, depending on individual nutritional needs, is safe,” he said.
At the same time, he cautioned against overconsumption. Dry fruits are nutrient-dense and contain compounds like oxalates, which in very high quantities could pose risks. “Excess of any item can be harmful. Dry fruits are rich in proteins and also contain oxalates and other minerals. If eaten excessively, say 100 to 200 or 300 grams in a day, it can definitely cause harm,” he explained.
Dr Bagai also pointed out that how dry fruits are prepared matters. “Sometimes they are salted or even fried, so we have to take care of the salt content as well,” he added.
Importantly, he dismissed the idea that dry fruits alone can cause kidney stones.
According to him, there is no strong scientific evidence to support such a claim. “There is no randomised, multicentric trial globally that has shown that dry fruits cause kidney stones. To say that they are solely responsible would be inaccurate,” he said.
He also addressed popular portion rules circulating online. “There is no fixed number like 6 almonds or 8 almonds. These are all mythical facts going around on ‘WhatsApp University’ - there is nothing to substantiate that,” he said. However, he noted that extremely high intake, such as 30–40 almonds at once, may lead to an overload of certain nutrients.
On the question of the “right” way to consume dry fruits, Dr Bagai said there is no strict rule. “You can eat dry fruits at any time,” he said, suggesting that small, reasonable portions, like 7–10 almonds, a few cashews, or some walnuts, are generally fine.
He also highlighted the importance of individual tolerance. “Some nuts like hazelnuts, walnuts, and cashews can trigger allergies in certain people. If there is no known allergy, then they are safe,” he concluded.
This story is done in collaboration with First Check, which is the health journalism vertical of DataLEADS
