Have you ever experienced diarrhea after eating at Subway? If so, you are not alone. Many people have reported getting sick after eating at this popular fast-food chain. While there could be a variety of reasons for this, including individual food sensitivities or allergies, it is worth exploring the possibility that there may be issues with the quality and safety of the food served at Subway. This article will investigate why does Subway give me diarrhea, examining potential factors such as food safety practices, quality control measures, and food handling procedures. We will also discuss the implications of these issues for public health and provide recommendations for Subway and customers to prevent diarrhea after eating.
What Causes Diarrhea?
Diarrhea is a common condition that is characterized by frequent loose or watery bowel movements. It is often caused by an infection or inflammation in the digestive tract. There are several factors that can contribute to diarrhea, including:
- Bacterial Infections: Diarrhea can be caused by bacterial infections, such as Salmonella or E. coli, which are often found in contaminated food or water.
- Viral Infections: Viral infections, such as the Norovirus, can also cause diarrhea, especially in crowded or poorly sanitized environments.
- Parasites: Parasites like Giardia can cause diarrhea and are often found in contaminated water.
- Food Allergies: Some people may experience diarrhea due to an allergic reaction to certain foods or food additives.
- Food Intolerance: Certain foods or ingredients can cause diarrhea in individuals with a food intolerance, such as lactose intolerance.
- Medications: Certain medications, such as antibiotics or laxatives, can cause diarrhea as a side effect.
- Stress: Stress and anxiety can also cause diarrhea in some people.

Why Does Subway Give Me Diarrhea?
Subway is a popular fast-food chain that has been in operation for over 50 years. While it is known for its customizable sandwiches and salads, some customers have reported experiencing diarrhea after eating at Subway. Here are some potential reasons why Subway may be causing diarrhea in some customers:
- Food-borne Illness: Subway may be a source of foodborne illnesses, such as Salmonella or E. coli, which can cause diarrhea. This can happen if food is not properly cooked or stored at the correct temperature.
- Cross-Contamination: Cross-contamination can occur when food comes into contact with surfaces or utensils that have been contaminated with bacteria or viruses. Subway may be at risk for cross-contamination if employees do not follow proper food handling procedures.
- Low-Quality Ingredients: Some customers have speculated that Subway’s ingredients may be of low quality, which could contribute to digestive issues such as diarrhea.
- High-Fat Content: Subway’s menu items can be high in fat, which can cause digestive issues for some individuals.
- Artificial Ingredients: Some customers have also raised concerns about the use of artificial ingredients in Subway’s food, which may contribute to digestive issues in some individuals.
Read More: Can a Massage Cause Diarrhea?
Food Quality and Safety at Subway
Food quality and safety are critical factors for any food establishment, including Subway. Here are some aspects of Subway’s food quality and safety practices:
- Food Safety Practices: Subway has several food safety practices in place to ensure that its food is safe for consumption. These include regular cleaning and sanitizing of equipment and surfaces, monitoring of food temperatures, and frequent hand washing by employees.
- Quality Control Measures: Subway has established quality control measures to ensure that its ingredients meet certain standards for freshness and safety. This includes regular testing of food products and ingredients to check for contamination and spoilage.
- Supplier Relationships: Subway works closely with its suppliers to ensure that its ingredients are of high quality and safe for consumption. The company has established relationships with suppliers that meet certain safety and quality standards.
- Nutrition Information: Subway provides nutrition information for its menu items, which can be helpful for customers with specific dietary needs or restrictions. This information includes details on the ingredients, nutritional content, and potential allergens in each menu item.
- Allergen Awareness: Subway takes allergen awareness seriously and has established policies and procedures to prevent cross-contamination of allergens. The company also provides information on potential allergens in its menu items and offers allergen-free menu options.

Handling and Preparation of Subway’s Food
The handling and preparation of food are critical factors for ensuring the safety and quality of the food at Subway. Here are some aspects of Subway’s handling and preparation practices:
- Ingredient Preparation: Subway’s ingredients are prepared fresh daily, with some ingredients prepared multiple times a day. This ensures that the ingredients are fresh and safe for consumption.
- Food Handling: Subway employees are trained on proper food handling techniques, such as hand washing, wearing gloves, and using utensils. This helps to prevent cross-contamination and the spread of bacteria or viruses.
- Equipment Maintenance: Subway regularly maintains its equipment to ensure that it is functioning properly and is safe for food preparation. This includes regular cleaning and sanitizing of equipment, as well as routine maintenance checks.
- Temperature Control: Subway monitors the temperature of its food products to ensure that they are stored and cooked at the proper temperature. This helps to prevent the growth of harmful bacteria and viruses.
- Customization: Subway offers customization of its menu items, which allows customers to choose the ingredients that they want in their sandwiches or salads. However, this can also increase the risk of cross-contamination if employees are not properly trained on how to handle and prepare customized orders.
Conclusion
In conclusion, Subway is a popular fast-food chain that prioritizes food quality and safety practices to ensure that its food is safe for consumption. However, there are still potential risks for food-borne illness or cross-contamination that can lead to digestive issues such as diarrhea. It is important for Subway to continue to address these concerns and prioritize food safety practices in order to maintain the trust and satisfaction of its customers.
FAQs
What are the potential causes of diarrhea after eating at Subway?
Potential causes include food-borne illness, cross-contamination, low-quality ingredients, high-fat content, and artificial ingredients.
Is Subway’s food safe for consumption?
Subway prioritizes food safety practices such as regular cleaning, supplier relationships, and temperature control to ensure that its food is safe for consumption.
How does Subway handle allergens?
Subway has established policies and procedures to prevent cross-contamination of allergens and provides information on potential allergens in its menu items.
Are Subway’s ingredients fresh?
Subway prepares its ingredients fresh daily, with some ingredients prepared multiple times a day.
Does Subway monitor the temperature of its food products?
Yes, Subway monitors the temperature of its food products to ensure that they are stored and cooked at the proper temperature.
How does Subway handle customized orders?
Subway offers customization of its menu items but employees are trained on how to handle and prepare customized orders to prevent cross-contamination.
Can high-fat content in Subway’s menu items cause digestive issues?
For some individuals, high-fat content can cause digestive issues such as diarrhea.
Medical References
- Centers for Disease Control and Prevention. (2021). Foodborne Illnesses and Germs.
- U.S. Food and Drug Administration. (2017). Food Safety Modernization Act.
- National Institutes of Health. (2021). Food Allergy.
- National Institutes of Health. (2020). Diarrhea.
- World Health Organization. (2018). Food Safety.
- American Heart Association. (2021). Dietary Fats.
- National Institutes of Health. (2021). Cross-Contamination.