
Mushrooms are a type of fungus that are often used in cooking due to their meaty, umami flavour. They are low in calories, fat, sodium and cholesterol, and are a good source of B vitamins, selenium, copper, potassium and antioxidants. But do mushrooms contain a lot of carbohydrates?
| Characteristics | Values |
|---|---|
| Carbohydrates in mushrooms | Vary by species, but overall, mushrooms have whole carbs that come primarily through fiber. |
| Carbohydrates in white button mushrooms | One cup of whole white button mushrooms, weighing 96 grams, contains 3.1 grams of carbohydrates. |
| Carbohydrates in oyster mushrooms | A single piece of oyster mushroom is said to have 9.52 grams of total carbs, with 3.6 grams being from fiber. |
| Carbohydrates in portabella mushrooms | A single piece of portabella mushroom is said to have 4.26 grams of total carbs, with 1.3 grams coming from fiber. |
| Carbohydrates in shiitake mushrooms | A single piece of shiitake mushroom, weighing 19 grams, contains 1.3 grams of total carbs. |
| Are mushrooms keto-friendly? | Yes, mushrooms are keto-friendly because they are low in carbohydrates. |
| Are mushrooms nutritious? | Mushrooms are highly nutritious. They are low in calories, have virtually no fat or cholesterol, and are a good source of selenium, copper, potassium, and vitamin D. |
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What You'll Learn

Mushrooms are keto-friendly
Mushrooms are highly nutritious and can be included in a keto diet in a variety of ways. They are high in fibre, B vitamins, selenium, copper, and potassium. They also contain antioxidants like ergothioneine and glutathione, which protect your cells from oxidative damage.
A ketogenic diet, or keto diet, is designed to be very low in carbohydrates and high in fat with moderate amounts of protein. Mushrooms fit the bill as they are low in calories and fat and have modest amounts of fibre and various nutrients.
A 2016 study found that eating 3.5 ounces (100 g) of white mushrooms for 16 weeks significantly improved antioxidant and anti-inflammatory markers. Mushrooms are also a good source of selenium and potassium. They provide a small amount of vitamin D and can increase their vitamin D content when exposed to light.
There are many ways to include mushrooms in a keto diet. They can be stuffed with keto-friendly ingredients like cream cheese, butter, shredded cheddar, or bacon and roasted in the oven with fresh herbs. They can also be diced and used in veggie burger patties made with riced cauliflower, garlic, onion, celery, cheese, and seasonings.
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Carbohydrates in mushrooms come from fibre
Mushrooms are low in carbohydrates and are considered keto-friendly. Common types of mushrooms, such as white button, shiitake, oyster, and portobello, are low in carbs and high in fibre. Fibre is one of the three main dietary categories of carbohydrates, along with starches and sugars. However, unlike other forms of carbohydrates, fibre does not provide energy directly. Instead, it feeds the friendly bacteria in the digestive system.
A single piece of oyster mushroom is said to contain 9.52 grams of total carbohydrates, with 3.6 grams derived from fibre. Similarly, a single piece of portabella mushroom contains 4.26 grams of total carbohydrates, with 1.3 grams coming from fibre. White button mushrooms contain slightly less fibre, with one cup containing 3.1 grams of total carbohydrates. Finally, shiitake mushrooms have the lowest carbohydrate content, with a single piece weighing 19 grams and containing 1.3 grams of total carbohydrates.
Mushrooms are a good source of dietary fibre, which has been associated with significant health benefits. For example, a 2020 study found that the polysaccharides in mushrooms help protect against diabetes by reducing oxidative stress. Additionally, a high-fibre diet has been linked to a lower risk of type 2 diabetes. Mushrooms also provide other essential nutrients, such as copper, potassium, iron, and B vitamins.
In conclusion, while mushrooms do contain some carbohydrates, the majority of these carbs come from fibre, which has important health benefits. Mushrooms are a nutritious food choice that can be enjoyed as part of a healthy, balanced diet.
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White button mushrooms contain 3.1g of carbs per cup
Mushrooms are a delicious and nutritious food that can be enjoyed in a variety of ways. They are known for their meaty, umami flavour and are often used as a meat substitute. While mushrooms are generally low in carbohydrates, the carb content can vary among different types of mushrooms.
White button mushrooms, in particular, have a relatively low carb content. On average, a cup of raw mushrooms contains just 15 calories, making them a great low-calorie food option. Out of these 15 calories, only 3.1 grams are carbohydrates. This makes white button mushrooms an excellent choice for individuals following a low-carb or ketogenic diet.
The keto diet, as it is commonly known, is designed to be very low in carbohydrates and high in fat, with moderate amounts of protein. The goal is to achieve and maintain a state of ketosis, where the body uses ketone bodies instead of glucose as its primary energy source. Mushrooms, including white button mushrooms, are keto-friendly as they are low in carbs and high in fibre and B vitamins.
In addition to their low carb content, white button mushrooms offer various nutritional benefits. They are a good source of copper, potassium, iron, and B vitamins. They also contain high levels of antioxidant compounds, which can provide numerous health benefits, such as slowing cognitive decline and protecting against oxidative damage.
Overall, white button mushrooms are a nutritious and delicious food option, especially for those watching their carbohydrate intake. With only 3.1 grams of carbohydrates per cup, they can be enjoyed in various recipes, such as stuffed mushrooms or pepperoni pizza frittata, while still maintaining a low-carb diet.
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Oyster mushrooms contain 9.52g of carbs per piece
Mushrooms are a great food to eat if you are watching your carbohydrate intake. They are extremely low in carbs and are considered keto-friendly. This includes common types of mushrooms such as white button, shiitake, oyster, and portobello.
Oyster mushrooms, in particular, are a great option if you are looking for a low-carb food. They are a good source of fiber, protein, and a variety of vitamins and minerals. One cup of raw, sliced oyster mushrooms (86 grams) provides 28 calories, 59% of which come from carbohydrates. This equates to 9.52 grams of carbohydrates per 100 grams of oyster mushrooms.
Oyster mushrooms are also a good source of beta-glucans, a type of fiber that has been shown to slow down carbohydrate digestion and absorption. This can help to improve blood sugar levels, making oyster mushrooms a good choice for people with diabetes. In addition, oyster mushrooms contain several substances that are thought to have health benefits, including dietary fiber, beta-glucan, and other polysaccharides, which are a class of carbohydrates that can affect immune function.
Oyster mushrooms are not only low in carbohydrates, but they also have a low glycemic load, making them a good choice for people watching their blood sugar levels. They are also a good source of nutrients, including niacin, riboflavin, phosphorus, copper, and selenium. With their delicate taste and meaty texture, oyster mushrooms can be a delicious and nutritious addition to a low-carb diet.
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Portobello mushrooms contain 4.26g of carbs per piece
Mushrooms are extremely low in carbohydrates, and Portobello mushrooms are no exception. In fact, Portobello mushrooms contain just 4.26g of carbohydrates per piece, or fewer than 4 grams of carbohydrates per large mushroom cap. This makes them a good option for people following a ketogenic, or keto, diet, which is designed to be very low in carbohydrates and high in fat, with moderate amounts of protein.
Portobello mushrooms are also low in calories, with only 18 calories per 3-ounce serving (about one mushroom), according to the USDA. This means that grilling Portobello mushroom caps instead of hamburgers can save over 150 calories. Portobello mushrooms are also a good source of plant-based protein, with more than 2 grams per mushroom.
In addition to their low-carb and low-calorie benefits, Portobello mushrooms offer other nutritional advantages. They are a rich source of copper and selenium, providing 27% and 29% of your recommended daily allowance (RDA) for these minerals, respectively. They also contain vitamin B6 and niacin, with one cup of diced portobellos supplying 7% and 24-27% of your RDA for these nutrients.
Portobello mushrooms are a versatile ingredient that can be grilled, sautéed, stuffed, or added to salads. They are known for their meaty, umami flavour and can be a delicious and healthy addition to any meal.
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Frequently asked questions
No, mushrooms are low in carbs and keto-friendly. Common types of mushrooms, like white button, shiitake, oyster, and portobello, are low in carbohydrates.
A keto diet is a low-carb, high-fat, and moderate-protein diet. The body uses ketones from fat for energy instead of carbohydrates.
Mushrooms are low in calories, have no fat or cholesterol, and are very low in sodium. They are also a good source of selenium, copper, potassium, and B vitamins like riboflavin and niacin.

























