How long would it take to become sick after eating bad mayonnaise?

The onset of symptoms for foodborne illness can vary depending on the specific type of bacteria or toxin involved. In the case of mayonnaise, the most common culprit is Staphylococcus aureus, which can produce a toxin that causes rapid onset of symptoms. Staphylococcus aureus can multiply quickly in mayonnaise if it is left at room temperature for too long, especially in warm weather.

Symptoms of foodborne illness caused by Staphylococcus aureus may appear as quickly as 30 minutes to several hours after consuming contaminated food. Common symptoms include:

- Nausea

- Vomiting

- Abdominal pain

- Diarrhea

- Headache

- Muscle aches

- Fatigue

- Fever and chills

If you experience any of these symptoms after consuming mayonnaise, it's important to seek medical attention, especially if the symptoms are severe or persistent. It is also important to properly refrigerate mayonnaise and other perishable food items to minimize the risk of foodborne illness.