Pickled mushrooms can be a healthy addition to your diet in moderation. Like most pickled foods, they're low in calories and can be a good source of vitamins and minerals, including vitamin C and potassium. They're also a good source of dietary fiber. However, it's important to note that the nutritional value of pickled mushrooms can vary depending on the recipe and the ingredients used. Pickling mushrooms in vinegar and high-sugar brines can add a significant amount of sodium and sugar to the dish, which can be detrimental to your health when consumed in large quantities. On the other hand, if you make your own pickled mushrooms using a low-sugar, low-salt recipe, they can be a healthy addition to your diet. They can add flavor and variety to your meals while also providing important vitamins and minerals.