2. Increased Risk of Weight Gain if Overeaten
Although walnuts are nutrient-dense, they are also high in calories—about 650 to 700 calories per 100 grams. Eating calorie-dense foods late at night can make it easier for the body to store excess calories as fat, especially when physical activity is low. Snacking on too many walnuts before bed may contribute to gradual weight gain, even if the food itself is healthy. Portion control is essential, especially for people trying to manage their weight or maintain a calorie deficit.
3. Feeling Overheated or Thirsty
Some individuals have more sensitive digestive systems and may experience unusual warmth or thirst after eating fatty foods at night. Because walnuts contain a significant amount of fat, the body may produce more metabolic heat during digestion. This can leave some people feeling uncomfortable or dehydrated when trying to sleep. Drinking water can help, but consuming walnuts earlier in the evening is a more effective solution.
4. Potential Sleep Disturbance
Walnuts naturally contain melatonin—a hormone that helps regulate sleep—and many believe that walnuts are a great nighttime snack. While this is true for some people, others experience the opposite effect. Because the digestive system must work harder to break down fats, eating walnuts too close to bedtime may cause subtle discomfort or restlessness. This can delay sleep onset or lead to frequent waking during the night, particularly in individuals who already struggle with sensitive digestion or acid reflux.
5. Who Should Be More Cautious?
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