side effects of cashew nuts

Major Side Effects Of Eating Too Many Cashews: Beware of Overeating

What are the potential drawbacks and side effects of cashew nuts? Can excessive consumption of cashews lead to diarrhea? What happens if you eat too many cashews? While cashews are a nutritious snack rich in copper, magnesium, and phosphorus, as well as protein and beneficial fats, overconsumption and allergy can cause rare side effects such as bloating, constipation, weight gain, and joint swelling.

Some compounds in cashews have antimicrobial properties and may help to lower cholesterol levels and blood pressure, but moderation is key to avoid potential health issues associated with excessive consumption of cashew nuts.

Learn more about the potential disadvantages and side effects of cashews in the article below.

How Many Cashews Can I Eat A Day?

side effects of cashew nuts

You can eat a moderate amount of cashews daily to enjoy their nutritional benefits without risking weight gain.

Nutritionists recommend limiting your consumption to 5-10 cashew nuts a day. If you are using cashews as a source of healthy fats and protein, you can consume 15-30 cashew nuts a day.

Cashews are rich in unsaturated fats and essential minerals like copper, magnesium, zinc, and iron, as well as vitamins K, E, and B vitamins.

Some studies suggest that consuming nuts like cashews can lower the risk of cardiovascular disease by reducing blood pressure and cholesterol levels.

Additionally, some vitamins and minerals in cashews, such as potassium, vitamin E, vitamin B-6, and folic acid, may help fight heart disease.

How Many Cashews Is Too Much?

Consuming over 40 cashews a day is considered excessive and can lead to overeating. However, athletes may be able to consume up to 30-40 cashews per day due to their higher metabolism and physical activity levels. It is important to stay hydrated by drinking at least 3 liters of water daily.

What Are the Side Effects Of Eating Too Many Cashew Nuts

Overconsumption of cashew nuts can result in various health problems, including:

  1. Weight gain
  2. Headaches
  3. Bloating
  4. Nutt allergy
  5. Drug interactions

Although cashews are a good source of protein, fat, fiber, and minerals such as magnesium, zinc, and selenium, excessive consumption can lead to rare side effects. People with nut allergies should also be cautious when consuming cashews. Moreover, in some cases, cashews may interact with certain medications. Therefore, it is advisable to consume cashews in moderation and seek medical attention if you experience any adverse effects.

Weight Gain

Cashew nuts are high in calories and fat, which can lead to weight gain if consumed excessively. However, consuming cashews in moderate amounts is not likely to cause weight gain. The fats in cashews are primarily “good” fats, which can have a positive impact on our health. If you eat too many cashew nuts, the most common side effect you may experience is weight gain. If you are looking to gain weight, consuming about 30-40 cashew nut kernels per day may be helpful. Therefore, it is important to consume cashews in moderation to avoid potential weight gain.


Headaches are a common side effect of consuming cashew nuts, as well as other nuts such as peanuts and almonds. Cashew nuts have been known to trigger migraines and cluster headaches due to their composition.

While cashews are generally considered healthy, some people may be hypersensitive to them.

Certain seasonal changes may also contribute to triggering headaches in some individuals. Cashews contain amino acids such as tyramine and phenylethylamine, which are beneficial for maintaining normal blood pressure levels and promoting a sense of well-being.

However, these amino acids may cause head pain in individuals who are sensitive to them.


Consuming fatty nuts such as cashew nuts, which are high in fat, can cause bloating. Bloating occurs when gas builds up in the stomach and intestines, which cannot pass through the body by belching or flatulence.

If you overeat cashew nuts, they can delay stomach emptying and lead to gastrointestinal side effects such as bloating and changes in bowel movements.

Unfortunately, all fatty foods, including cashews, can cause these side effects in people with functional dyspepsia.

Most nuts contain compounds like phytates and tannins, which make them difficult to digest. Nuts also contain different types of fat, which can cause diarrhea. T

herefore, cashews may cause bloating in some individuals for various reasons.

Nutt Allergy

Individuals with a nut allergy should avoid consuming excessive amounts of cashew nuts due to the risk of serious allergic reactions. While cashew allergies are less common than tree nuts or peanuts, studies have shown that the incidence of cashew allergies is increasing, especially among young children who may not have been previously exposed to this allergen. Research has found that anaphylaxis or constriction of the airways is more common in individuals with cashew allergies than in those with peanut allergies.

Symptoms of cashew nut allergies include:

  1. Headache
  2. Hives and itching
  3. Nausea
  4. Swelling of the mouth, face, or lips
  5. Swelling of the throat
  6. Sneezing
  7. Stomach pain
  8. Vomiting

Although cashew allergies are relatively rare, approximately 0.1% of Americans have an allergy to cashews, and less than 1 in 1000 individuals will develop a severe allergy after being exposed to cashews. Therefore, it is important for individuals with a cashew allergy to be aware of the symptoms and seek medical attention if they experience any adverse reactions.

Drug interactions

While cashew nuts are an excellent source of magnesium, which provides many health benefits, there is a risk associated with magnesium interfering with certain medications. According to the University of Maryland Medical Center, several drugs interact with magnesium, which is present in cashews at high levels, and can disrupt the effect of those drugs. For instance, quinolone antibiotics like ciprofloxacin may bind with magnesium and prevent adequate absorption of antibiotics.

Here are some drugs that may interact with cashew nut kernels:

  1. Insulin
  2. Glimepiride (Amaryl)
  3. Glyburide (DiaBeta Glynase PresTab, Micronase)
  4. Pioglitazone (Actos)
  5. Rosiglitazone (Avandia)
  6. Chlorpropamide (Diabinese)
  7. Glipizide (Glucotrol)
  8. Tolbutamide (Orinase)

Dragon fruits, as well as cashews, in large quantities, can have negative effects on the action of medications that enhance insulin production.

Therefore, individuals taking any of these medications should be cautious when consuming cashew nuts and consult their healthcare provider if they have any concerns about potential drug interactions.

Are Cashews Good for Your Health?

Cashew nuts offer various health benefits, provided that they are consumed in moderation. Here are some of the advantages of consuming cashew nut kernels:

  1. Weight management: Cashew nuts may help control weight when consumed in moderation.
  2. Improved heart health: Cashews contain healthy fats that can lower cholesterol levels and reduce the risk of cardiovascular disease.
  3. Lower blood pressure: Consuming cashew nuts may help lower blood pressure levels.
  4. Improved brain health and function: Cashews are rich in antioxidants and essential nutrients that can promote brain health and function.
  5. Stronger immune system: Cashews contain essential vitamins and minerals that can help strengthen the immune system.
  6. Prevention and control of diabetes: Cashew nuts may help prevent and control diabetes when consumed in moderation.

Cashews are also a nutrient-dense food that contains healthy fats such as omega-6 and omega-3 fatty acids, as well as essential vitamins and minerals such as vitamin E, copper, manganese, and phosphorous. Moreover, consuming cashew nuts can improve eye health, reduce symptoms of migraines, improve sleep quality, and even help prevent cancer. Therefore, incorporating cashew nuts into a balanced diet can provide many health benefits.


Can eating cashews help with weight loss?

Consuming cashews in moderation can help with weight loss as they contain healthy fats, fiber, and protein, which can help you feel fuller for longer periods. Additionally, cashews are nutrient-dense and contain essential vitamins and minerals that promote overall health. However, consuming excessive amounts of cashews can lead to weight gain, so it is essential to limit your intake.

Can cashews cause constipation?

Cashews are rich in fiber, which is beneficial for digestive health. However, excessive consumption of cashews can lead to constipation due to their high fat content. Moreover, consuming too many cashews may delay stomach emptying, leading to gastrointestinal side effects such as bloating and changes in bowel movements.

Are cashews safe for individuals with diabetes?

Cashews are a low-glycemic index food, meaning they do not cause significant spikes in blood sugar levels. Additionally, consuming cashews in moderation can help prevent and control diabetes as they contain healthy fats, fiber, and essential minerals such as magnesium, which have been shown to improve insulin sensitivity. However, individuals with diabetes should limit their intake of cashews as they are high in calories and fat.

Can cashews help improve brain function?

Cashews are rich in antioxidants, essential vitamins, and minerals that promote brain health and function. Moreover, they contain omega-3 and omega-6 fatty acids, which are essential for cognitive development and brain function. Consuming cashews in moderation may help improve memory, concentration, and overall brain function.

Are raw or roasted cashews better for you?

Raw and roasted cashews both offer similar health benefits, as long as they are consumed in moderation. Raw cashews contain more enzymes and nutrients, while roasted cashews have a crunchy texture and a unique flavor. However, roasted cashews may contain added salt and oils, which can increase the calorie and fat content. Therefore, it is best to consume unsalted and unroasted cashews in moderation.

Can cashews cause allergies?

Yes, cashews can cause allergies in some individuals, although they are less common than tree nuts and peanuts. Cashew allergies can range from mild symptoms such as itching and hives to severe reactions such as anaphylaxis, which can be life-threatening. If you experience any adverse reactions after consuming cashews, seek medical attention immediately.

Are cashews a good source of protein?

Cashews are a good source of protein, containing approximately 5 grams of protein per ounce. However, they are not a complete source of protein and should be consumed in conjunction with other protein sources such as meat, fish, eggs, and legumes to ensure adequate protein intake.

Can cashews help reduce the risk of cancer?

Cashews contain antioxidants such as polyphenols and carotenoids that can help fight oxidative stress and reduce the risk of cancer. Moreover, they contain essential minerals such as selenium and zinc, which have been shown to help prevent and control cancer. However, consuming cashews alone cannot guarantee protection against cancer, and a balanced diet and a healthy lifestyle are essential for reducing the risk of cancer.

Are cashews good for heart health?

Cashews contain healthy fats, fiber, and essential minerals such as copper, magnesium, and potassium, which can improve heart health by reducing cholesterol levels and blood pressure. Consuming cashews in moderation can lower the risk of cardiovascular disease and improve overall heart health.

Can cashews be consumed during pregnancy?

Yes, cashews can be consumed during pregnancy as they are a good source of essential nutrients such as folate, magnesium, and iron. However, it is essential to consume them in moderation


Cashew nuts are a nutritious and tasty snack that can provide numerous health benefits. They are a good source of healthy fats, protein, fiber, and essential vitamins and minerals.

However, it is important to consume cashews in moderation to avoid potential side effects such as bloating, weight gain, headaches, and allergic reactions.

Additionally, individuals taking certain medications should be cautious when consuming cashew nuts due to the risk of drug interactions.

Overall, cashews can be a healthy addition to a balanced diet when consumed in moderation and as part of a healthy lifestyle.

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