
Mushrooms are a good source of fibre, vitamins, and minerals, and are often consumed for their nutritional value and distinctive flavour. They are low in calories, fat, and salt, and are an excellent source of B vitamins, vitamin D, and several essential minerals. They are also packed with essential nutrients, making them a valuable addition to any healthy eating plan. While mushrooms do contain carbohydrates, they are not considered a starchy food and have minimal carbohydrate content. The amount of carbohydrates in mushrooms varies by species, but they are primarily whole carbs that come through fibre.
| Characteristics | Values |
|---|---|
| Carbohydrate content | The amount of carbohydrates in mushrooms varies depending on the type of mushroom. White mushrooms contain 3.26 grams of carbs per 100 grams, while portobello mushrooms contain 3.87 grams of carbs per 100 grams. Oyster mushrooms and shiitake mushrooms have slightly higher carb content, with 6.09 grams and 6.79 grams of carbs per 100 grams, respectively. Raw mushrooms contain 2.3 grams of total carbs per cup. White button mushrooms contain 3.1 grams of carbs per cup. A single oyster mushroom contains 9.52 grams of total carbs. A single portabella mushroom contains 4.26 grams of total carbs. A single shiitake mushroom contains 1.3 grams of total carbs. |
| Calories | Mushrooms are low in calories. A 100-gram serving of white mushrooms contains only 22 calories. |
| Nutrients | Mushrooms are a good source of fiber, vitamins (including vitamin D and B vitamins), minerals, copper, niacin, pantothenic acid, selenium, riboflavin, and ergosterol. They also contain polysaccharides, indoles, polyphenols, and carotenoids, which have been associated with antioxidant, anti-inflammatory, and anticancer effects. |
| Health benefits | Mushrooms have therapeutic properties, including supporting immunity, improving gut health, and maintaining a healthy body weight. They are compatible with low-carb diets like the keto diet and can help manage carbohydrate intake. |
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What You'll Learn

Carbohydrate content varies by species
Mushrooms are a good source of fibre, vitamins, and minerals, making them a valuable addition to a diet. They are low in calories and fat and are compatible with low-carb diets. The amount of carbohydrates in mushrooms varies depending on the type of mushroom. For instance, a 100-gram serving of white mushrooms has 3.26 grams of carbs, while the same serving of oyster mushrooms has 6.09 grams.
White button mushrooms, which are among the most popular mushrooms in the United States, contain 3.1 grams of carbohydrates per cup (96 grams). Portobello mushrooms, which are similar in appearance to white button mushrooms, contain slightly more carbs, with 3.87 grams per 100-gram serving or 4.26 grams per piece.
Oyster mushrooms, known for their distinct flavour, have a higher carb content, with 9.52 grams of total carbs per piece, 3.6 grams of which come from fibre. Shiitake mushrooms, another popular variety, contain 6.79 grams of carbs per 100 grams or 1.3 grams per piece.
The variation in carbohydrate content across different mushroom species is worth noting. This information can help individuals make informed dietary choices, especially those mindful of their carbohydrate intake. Mushrooms offer a versatile and flavourful ingredient that can enhance culinary experiences without significantly impacting one's carb intake.
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Mushrooms are a good source of fibre
Mushrooms contain chitin and beta-glucan polysaccharides, which are associated with improved gut health, heart health, and immunity. Research has also shown that mushrooms could have therapeutic properties, including supporting immunity, improving gut health, and more, making them a valuable addition to any healthy and balanced diet.
Harvard's School of Public Health notes that "all varieties of mushrooms are low in calories and fat, and contain modest amounts of fibre and various nutrients." The amount of fibre in mushrooms varies by species, but overall, they are a good source of fibre. For example, a single piece of oyster mushroom is said to have 9.52 grams of total carbs, with 3.6 grams coming from fibre. Similarly, a single piece of portabella mushroom is said to have 4.26 grams of total carbs, with 1.3 grams coming from fibre.
Mushrooms are a versatile ingredient that can be incorporated into various dishes, such as stir-fries, side dishes, and meat substitutes. They offer a delicious umami flavour and are compatible with low-carb diets like the keto diet due to their low carbohydrate and calorie content. By including mushrooms in your meals, you can increase your fibre intake and enjoy the nutritional benefits that they provide.
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Nutritional value and health benefits
Mushrooms are fungi, and while they do contain carbohydrates, their carb content is minimal. For instance, a 100-gram serving of white mushrooms has 3.26 grams of carbs, while the same serving of portobello mushrooms has 3.87 grams. Oyster and shiitake mushrooms have slightly higher carb content, with 6.09 and 6.79 grams of carbs per 100 grams, respectively. Given their low carb content, mushrooms are compatible with low-carb diets like the keto diet.
In addition to being low in carbohydrates, mushrooms are also low in calories, with 100 grams of white mushrooms containing only 22 calories. They are also naturally low in sodium, with just five milligrams of sodium in a cup of white button mushrooms. This makes them an excellent substitute for red meat, as they can help minimise calories, fat, and cholesterol.
Mushrooms are nutrient-dense, loaded with health-boosting vitamins, minerals, and antioxidants. They are a good source of vitamin D, which is critical for bone formation and immune health. They also contain selenium, which helps prevent cell damage, and vitamin B6, which helps form red blood cells. Certain mushrooms, like cremini, are an excellent source of zinc, which is important for the immune system and optimal growth in infants and children.
Mushrooms are also a source of ergothioneine, an amino acid and antioxidant that prevents or slows cellular damage. They contain polysaccharides, which stimulate the growth of healthy bacteria in the gut and improve insulin resistance and GI health. Research suggests that eating 1 to 2 cups of mushrooms each week may reduce the risk of cancer by up to 45% and cut the risk of developing cognitive impairment in half. They may also help protect against neurodegenerative diseases like Alzheimer's and Parkinson's.
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Mushrooms are low in calories
The carbohydrates in mushrooms are primarily dietary fibres, which have a range of health benefits. They act as prebiotics, fuel for the helpful microorganisms in the intestines, and improve digestion by absorbing water to soften stools and prevent constipation. Dietary fibre has also been linked to maintaining a healthy body weight and reducing the risk of chronic diseases.
Mushrooms are a good option for people looking to manage their carbohydrate intake while still enjoying a flavourful and nutritious food. They can be added to meals in various ways, such as sautéing them as a side dish, including them in stir-fries, or using them as a meat substitute in dishes like mushroom risotto.
Additionally, mushrooms are a good source of B vitamins, vitamin D, and several essential minerals. Research has shown that mushrooms may have therapeutic properties, including supporting immunity and improving gut health. Overall, mushrooms are a healthy and delicious addition to any diet, providing various nutritional benefits without adding significant calories.
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Different preparation methods
Mushrooms are a versatile ingredient that can be prepared in a variety of ways. Here are some of the most common preparation methods:
Sautéing
Sautéing is a popular method for cooking mushrooms. It involves heating a pan to medium-high heat, adding mushrooms in a single layer, and letting them cook without stirring until they release their juices and start to brown. You can use a variety of mushrooms, such as cremini, shiitake, portobello, oyster, or wild mushrooms. After they have browned on one side, you can stir them and season with salt and pepper. For added flavour, you can also add butter, garlic, thyme, and lemon zest. Sautéed mushrooms can be served as a side dish, on toast, or used as a pasta sauce. They can also be stored in an airtight container in the refrigerator for up to four days or frozen for up to six months.
Dry Sautéing
Dry sautéing is a variation of the traditional sauté method that does not require the use of butter or oil. Mushrooms are cooked in a hot pan without any added fat, liquid, or sauce. As they heat up, they release their juices and cook in their own liquid, concentrating their flavour. Towards the end of cooking, you can add butter or other seasonings if desired. This method is suitable for various mushroom varieties, including white button mushrooms and wild mushrooms.
Pan-Frying
Pan-frying mushrooms involves cooking them in a mixture of olive oil and butter over medium-high heat. Similar to sautéing, it is important to not overcrowd the pan and to let the mushrooms cook undisturbed until they start to brown. You can season with salt and pepper and add fresh herbs like parsley or thyme. Pan-fried mushrooms can be served as a side dish, used as a base for a curry, or added to eggs for a one-pan brunch dish.
Roasting
While specific instructions for roasting mushrooms are not provided in the sources, it is mentioned as an alternative preparation method to stove-top cooking. Roasting typically involves cooking food in an oven, which can help to achieve a different texture and flavour profile compared to pan-frying or sautéing.
Cooking with Liquid
Mushrooms can also be cooked with various liquids to enhance their flavour. This can include adding water, vegetable oil, chicken broth, or wine to the pan. For example, one recipe suggests adding water to the mushrooms during cooking, followed by vegetable oil, butter, shallots, rosemary, salt, pepper, red wine, and cider vinegar. Another recipe incorporates chicken broth, while others suggest using cooking wine or Marsala wine to enhance the flavour of the mushrooms.
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Frequently asked questions
Yes, mushrooms are a carbohydrate, but they are not considered a starchy food. They are often grouped with vegetables, but they are actually a fungus.
The exact amount of carbohydrates in mushrooms varies depending on the type of mushroom. White mushrooms contain 3.26 grams of carbohydrates per 100 grams, while oyster mushrooms contain 6.09 grams per 100 grams.
Yes, mushrooms are compatible with low-carb diets such as the keto diet because their carb content is minimal. They are low in calories and packed with essential nutrients, making them a valuable addition to any healthy eating plan.
Mushrooms are low in calories, fat, and salt, and are a good source of vitamins, minerals, and fiber. Research has shown that mushrooms have therapeutic properties, including supporting immunity and improving gut health. They also contain unique carbohydrates that may contribute significantly to their health benefits.

























