Cashews: Nutrition, Allergy Risks & Side Effects

Cashews are native to South America and technically seeds (not true nuts). They provide healthy fats and approximately 5 g of protein per ounce, making them a popular “healthy snack” option in moderation. Despite these benefits, cashews are also associated with significant allergic reactions, possible drug interactions, and issues for individuals who need to limit magnesium.

Cashew Allergies (Higher Risk Than Peanut Allergy)

Cashew allergies are increasing globally and have become a concern even in children who have never been exposed before. Compared to peanut allergy, cashew allergy may more commonly lead to severe reactions, including anaphylaxis, which is a medical emergency involving airway swelling, low blood pressure, and respiratory distress.

Common reactions may include:

• Hives or rashes

• Itchy mouth or throat

• Facial swelling

• Digestive upset

• Difficulty breathing (urgent symptom)

• Anaphylaxis (life-threatening)

First Aid Link:
➡ Individuals at risk of anaphylaxis should have an epinephrine auto-injector and should be trained in its use. Canadian first aid programs teach recognition of allergic reactions and emergency response including 911 activation and epinephrine administration.
• Learn more about first aid & anaphylaxis training in Canada → Adult & Pediatric First Aid Courses

Sodium in Cashews (Especially Flavoured & Salted Snacks)

Cashews themselves are low in sodium (≈ 5 mg/oz unsalted), but salted or flavoured snack varieties can exceed 80 mg per ounce, contributing to excess sodium intake.

Health Canada recommends limiting sodium to reduce risks of:

• High blood pressure

• Heart disease

• Stroke

• Kidney disease

Weight Gain & Portion Control

Cashews contain healthy fats, but they are calorie-dense. Eating them mindlessly (especially from large containers) can promote excess caloric intake and weight gain—raising risks for:

• Diabetes

• Hyperlipidemia

• Stroke

• Metabolic syndrome

• Heart disease

Moderation matters.

Magnesium Content & Drug Interactions

Cashews contain high levels of magnesium, which may interact with several medications. Documented interactions include:

Important: Always review medication labels & consult a pharmacist, especially when combining supplements, nuts, and high-magnesium foods.

Relevance to Food Safety & Workplace First Aid in Canada

This topic matters in occupational and food-service environments:

✔ Food Safety – cashews are a priority allergen in Canadian kitchens & can trigger cross-contact risks in restaurants, cafeterias & daycare food prep.
✔ Workplace First Aid – staff should recognize signs of allergic reactions and know when to administer epinephrine & call 911.
✔ WHMIS & Safety Culture – awareness of food allergens reduces liability & protects customers and employees.

Workers in food-service environments benefit from Canadian certifications such as:
➡ Food Safety Handler Certification (Canada)
➡ Workplace First Aid & CPR (CSA-compliant)

When to Seek Medical Attention

A doctor or allergist should assess if the individual experiences:

• Breathing difficulties

• Facial or throat swelling

• Reactions involving multiple organ systems

• Symptoms after minimal exposure

Immediate 911 activation is required if anaphylaxis is suspected.

Educational Disclaimer (Canada)

This content is for informational & first aid education purposes only. It does not replace medical diagnosis, allergy testing, or emergency care. If anaphylaxis is suspected, call 911 in Canada and administer epinephrine if available and trained to use it.