Variety Differences: Different varieties of dried walnuts may differ in calorie content. Some varieties have plump kernels and relatively higher fat content, resulting in higher calorie counts. For example, paper-shelled walnuts, with their large and plump kernels, may have a slightly higher fat content than regular walnuts, potentially increasing calorie count by 10-20 kcal per 100g. This is related to the genetic characteristics and growing environment of the variety.
Processing Methods: The processing method affects the calorie content of dried walnuts. Plain dried walnuts generally maintain their original calorie levels. However, processing methods, such as salting or adding sugar and oil, will further increase calorie count. Salted walnuts gain weight due to the added salt, while added sugar and oil can increase calorie count by 100-200 kcal per 100g.
Edible Portion: When eating walnuts, consuming the inner shell along with the walnut increases dietary fiber intake. However, the inner shell accounts for a certain weight, which can affect the accurate calculation of walnut calories. If you remove the inner skin and only eat the kernel, the calorie count per 100g of kernels is more accurate, but the overall calorie intake may feel higher because the inner skin is no longer present, so you need to pay attention to the amount you eat.

