Doctors Reveal That Eating Lettuce in Winter Causes These Surprising Effects

January 12, 2026 by youssef

People with sensitive stomachs or weak digestion are more likely to experience these issues.

2. Weakened Immune Response

During winter, the immune system needs extra support to fight colds, flu, and infections. Lettuce is low in calories and does not provide much energy or warmth to the body.
Doctors explain that relying too much on raw lettuce instead of warm, nutrient-dense foods may reduce the body’s ability to resist seasonal illnesses.

3. Possible Exposure to Bacteria

In winter, lettuce is often grown in greenhouses or imported from other regions. Medical experts warn that improperly washed lettuce may carry harmful bacteria such as E. coli or Listeria.
Because lettuce is usually eaten raw, these bacteria are not killed by cooking, increasing the risk of food poisoning—especially in children, pregnant women, and the elderly.

4. Worsening Joint and Body Pain

Some doctors note that cold foods, including raw lettuce, may worsen joint pain in people who suffer from arthritis or chronic body aches. In cold weather, this effect can feel stronger, causing stiffness and discomfort.

5. Reduced Nutritional Benefit in Winter

Lettuce contains vitamins like A and K, but it lacks iron, protein, and warming nutrients the body needs in winter. Doctors recommend focusing more on seasonal vegetables such as carrots, pumpkin, spinach (cooked), and legumes for better nutrition.

Should You Stop Eating Lettuce in Winter?

Should You Stop Eating Lettuce in Winter?

Doctors do not say you must completely avoid lettuce. Instead, they advise moderation.
If you enjoy lettuce:

• • Eat smaller portions
  • Combine it with warm foods
  • Wash it thoroughly
  • Avoid eating it straight from the refrigerator