Periodically there are outbreaks of illness caused by eating contaminated leafy greens. The contaminants are usually bacteria such as E coli and Salmonella. The illness is typically diarrhea, sometimes with belly cramps, nausea, and vomiting. And rare deaths.
Cathe Friedrich published an interesting article about this phenomenon. Here are a few bullet points (I haven’t independently verified):
- Leafy greens such as lettuce are linked to 22% of food poisoning outbreaks over over the last 10 years
- The riskiest leafy green is bagged, ready-to-serve lettuce
A few ways to avoid foodborne illness:
- Avoid pre-packaged leafy greens
- Avoid sprouts
- Keep the produce refrigerated and dry
- Consume before the expiration date
Click for leafy green food safety tips from the Canadian government.
Click for a harrowing story at Consumer Reports about E coli poisoning from romaine lettuce.
Consumer Reports article on the safest ways to eat salad.
Steve Parker, M.D.
h/t Jan at The Low Carb Diabetic
Diabetic Mediterranean Diet 
Leafy green vegetables are an important part of a healthy diet. They’re packed with vitamins, minerals and fibre but low in calories. It is delicious for health conscious
Leafy greens are important for your diet. It contains lots of nutrients and minerals. Please do include it in your daily diet.