
Mushrooms are a versatile ingredient that can be incorporated into a variety of dishes, but how many net carbs do they contain? This is an important question for those adhering to a ketogenic diet, which involves limiting carbohydrate intake to less than 20-50 grams per day. Mushrooms are known for their low-carb content, but the specific amount of net carbs can vary depending on the type and quantity of mushrooms. For example, a cup of raw white button mushrooms contains around 3 grams of total carbs, while a cup of raw oyster mushrooms has 6 grams. Shiitake mushrooms, when cooked, offer 8.2 grams of net carbs per 0.5 cups. Portobello mushrooms, commonly used as a meat substitute, provide around 3 grams of carbs per cup. With their modest net carb content, mushrooms can be a beneficial and nutritious addition to keto diets.
| Characteristics | Values |
|---|---|
| Carbohydrate content in raw mushrooms per cup | 2.3g-7g |
| Carbohydrate content in raw mushrooms per 100g | 3.13g |
| Carbohydrate content in cooked shiitake mushrooms per 0.5 cups | 8.2g |
| Carbohydrate content in canned mushroom soup per 1/2 cup | 8g |
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What You'll Learn

Raw mushrooms contain 1g net carbs per cup
Mushrooms are a great addition to a keto diet due to their low net carb content. Raw mushrooms contain 1g net carb per cup, making them a beneficial choice for those adhering to a low-carb, high-fat diet.
Mushrooms are a versatile ingredient that can complement a balanced diet, whether you're on a keto diet or not. They are a good source of fibre and protein and are rich in vitamins and minerals, including B vitamins like riboflavin, niacin, and vitamin B6, as well as minerals like selenium, copper, and potassium.
While the net carb content of mushrooms varies depending on the type of mushroom and its preparation, common types of mushrooms like white button, shiitake, oyster, and portobello are naturally low in carbohydrates. For example, a cup of raw whole white button mushrooms contains 3 grams of carbs, while a cup of raw oyster and shiitake mushrooms has around 6 and 7 grams of carbs, respectively.
Mushrooms can be enjoyed in a variety of ways on a keto diet. They can be eaten raw or cooked, and used in dishes such as soups, omelettes, or as a meat substitute in burgers. Remember to practice portion control and track your carb intake to ensure you stay within your desired keto carb range.
Overall, mushrooms are a nutritious and delicious food that can easily fit into a keto diet, providing various health benefits and enhancing your culinary experience.
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Cooked shiitake mushrooms have 8.2g net carbs per 0.5 cups
Mushrooms are a great addition to a keto diet because they are low in carbohydrates and fat. They are also a source of fibre and protein, making them a versatile ingredient for a variety of meals.
While all mushrooms belong to the same fungal family, their net carbohydrate content varies. For instance, cooked shiitake mushrooms have 8.2g net carbs per 0.5 cups. In comparison, raw shiitake mushrooms contain 6g net carbs per cup, while raw white button mushrooms contain 3g net carbs per cup.
Mushrooms are a nutrient-dense food, providing a natural source of key vitamins and minerals, including B vitamins like riboflavin (B2), niacin (B3), and pantothenic acid (B5), which help the body convert food into energy and reduce tiredness and fatigue. They also contain several antioxidants, like ergothioneine and glutathione, which can help protect your cells from oxidative damage.
Mushrooms can be incorporated into a keto diet in a multitude of ways. They can be used as a vegetable side, sautéed in healthy fats like olive oil or butter, or stuffed with cheese and baked for a satisfying snack.
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White button mushrooms contain 3g carbs per cup
White button mushrooms are a common variety of mushroom. They have a small stem, a smooth cap, and a mild flavour that pairs well with many dishes. They are also incredibly popular in the United States and many other countries. White button mushrooms are low in carbohydrates, with 3 grams of carbs per 1-cup (96-gram) serving. This makes them a keto-friendly food, as the keto diet is designed to be low in carbohydrates, high in fat, and moderate in protein.
White button mushrooms are also low in calories and sugar, and high in protein and vitamin D. They are a good source of vitamin B12 and contain multiple antioxidant compounds, including polyphenols, polysaccharides, ergothioneine, glutathione, selenium, and vitamin C. These antioxidants help to combat the harmful effects of oxidative stress, which can lead to cellular damage, accelerated ageing, and an increased risk of heart disease and certain cancers.
The polysaccharides in white button mushrooms, such as beta glucan, have potential anticancer effects. Beta glucan stimulates the immune system to activate macrophages and natural killer cells, which protect the body from infection, harmful organisms, and diseases, including cancer. Glutathione acts as an antioxidant and detoxification agent, helping to eliminate potentially harmful foreign substances from the body. Ergothioneine protects DNA from oxidative damage, and vitamin C and selenium offer additional anticancer properties that enhance the immune system's production of protective cells.
White button mushrooms are a nutritious and healthy food choice, offering a range of potential health benefits due to their low-carbohydrate content and high levels of antioxidants and other beneficial compounds. They are a good option for people following a keto diet or those looking to maintain healthy blood sugar levels.
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Oyster mushrooms contain 6g carbs per cup
Oyster mushrooms are a nutritious food with several health benefits. They are low in calories and contain only 6 grams of carbohydrates per cup. They are also a good source of niacin, fiber, and riboflavin, with one cup providing 2 grams of fiber. In addition, oyster mushrooms contain several substances that are thought to have health benefits, including dietary fiber, beta-glucan, and other polysaccharides.
Scientific studies have found that oyster mushrooms may have immune-enhancing effects and cancer-fighting properties. For example, a 2015 study suggested that the dietary fiber in oyster mushrooms may help reduce triglyceride accumulation in the liver. Another study, published in 2016, found that oyster mushroom extract might enhance immune function. Furthermore, oyster mushrooms are a good source of several vitamins and minerals, including phosphorus, copper, and niacin. They also contain antioxidants, which can help protect cells from oxidative damage.
Oyster mushrooms are not only nutritious but also low in carbohydrates, making them a keto-friendly food. The keto diet is designed to be low in carbohydrates and high in fat, and oyster mushrooms fit the bill with only 6 grams of carbs per cup. In addition, they are versatile and can be enjoyed raw or cooked in a variety of dishes.
It's worth noting that while oyster mushrooms are generally safe to consume, there has been at least one case report of an allergic reaction. If you have a mold allergy, you may be more susceptible to experiencing an allergic reaction to oyster mushrooms or other types of fungi. However, for most people, oyster mushrooms are a healthy and delicious addition to their meals.
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Portobello mushrooms contain 3g carbs per cup
Portobello mushrooms are a tasty and nutritious food that can be incorporated into a keto diet. They are naturally low in carbohydrates, with a 1-cup (86-gram) serving of diced portobello mushrooms containing around 3 grams of carbs. This makes them a good option for those adhering to a low-carb, high-fat ketogenic diet, which typically involves limiting carb intake to less than 20-50 grams per day.
Portobello mushrooms are not only low in carbs but also provide a range of nutritional benefits. They are a good source of fibre, which can be difficult to obtain on the keto diet as it is typically found in carb-rich foods. Additionally, they contain B vitamins, including riboflavin, niacin, and vitamin B-6, as well as minerals like selenium, copper, and potassium. These nutrients contribute to overall health and support various bodily functions.
When incorporating portobello mushrooms into a keto diet, they can be used in a variety of ways. They can be enjoyed raw or cooked, and they make a great meatless burger option or a substitute for burger buns. They can also be stuffed with keto-friendly ingredients like cheese, butter, or bacon and roasted in the oven. Portobello mushrooms can add a unique flavour and texture to dishes, making them a versatile and tasty ingredient for those following a keto diet.
While portobello mushrooms are a healthy and low-carb option, it is important to practise portion control and track overall carb intake when following a keto diet. As a general guideline, it is unlikely that one would exceed their daily carb limit by including mushrooms in their diet, unless they plan to consume six cups or more per day or prepare them as part of a carb-heavy meal. However, individual carb tolerance may vary, and it is always recommended to consult with a doctor or registered dietitian before starting any restrictive diet, such as keto.
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Frequently asked questions
Mushrooms are low in carbohydrates, with 100g of mushrooms containing 3.13g of net carbs.
Yes, mushrooms are keto-friendly. They are low in carbohydrates and high in fibre, vitamins, and minerals.
Common types of mushrooms that are keto-friendly include white button, portobello, raw oyster, and shiitake mushrooms.

























