
Mushrooms are a versatile ingredient used in a variety of dishes. They are known for their meaty, savoury flavour and health benefits. But are mushrooms high in carbs or sugar? Mushrooms are, in fact, low in carbohydrates and sugar. They are also a good source of fibre, vitamins, minerals, and antioxidants. While the amount of carbs varies slightly by species, common types like white button, shiitake, oyster, and portobello mushrooms are low in carbs and keto-friendly in their natural form. Canned mushroom products, on the other hand, tend to be higher in carbs due to added ingredients.
| Characteristics | Values |
|---|---|
| Carbohydrates | Low |
| Carbohydrates content | 1 cup of raw mushrooms contains 2.3 grams of carbohydrates |
| Carbohydrates type | Whole carbs |
| Sugar | No information found |
| Keto-friendly | Yes |
| Nutritional benefits | High in fiber, vitamin D, selenium, B6, potassium, copper, B vitamins, iron, antioxidants, and protein |
| Calories | Low |
| Fat | Very low |
| Sodium | Low |
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What You'll Learn

Mushrooms are low in carbs
Mushrooms are keto-friendly, as they are low in carbohydrates and high in fibre. They can be enjoyed both raw and cooked and used in a variety of ways that are suitable for a keto diet. They are also a good source of B vitamins, selenium, copper, potassium, and iron.
Mushrooms are also a good food option for those who are not on a keto diet. They are low in calories, have virtually no fat or cholesterol, and are very low in sodium. They are also a source of protein, although the amount is not comparable to meat or fish.
However, it is important to note that canned mushroom products, like cream of mushroom soup, are generally higher in carbs and might not fit into a keto diet. Therefore, it is recommended to check the nutrition labels of these products.
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Carbohydrates in mushrooms are mostly whole carbs
Mushrooms are low in carbohydrates and keto-friendly in their natural form. Common types of mushrooms like white button, shiitake, oyster, and portobello are low in carbohydrates. For example, a 1-cup (96-gram) serving of raw, whole white button mushrooms contributes 3 grams of carbs to your day. A cup of raw oyster and shiitake mushrooms contains around 6 and 7 grams of carbs, respectively. If you like portobello mushrooms, you’ll find around 3 grams of carbs in a 1-cup (86-gram) serving of them diced.
Mushrooms are a good source of fiber, particularly the soluble fiber beta-glucan. They have a naturally low glycemic index, which means they are presumed to have little negative effect on blood glucose or insulin response due to their low carbohydrate content. The carbohydrates in mushrooms are mostly whole carbs, which are foods that have not been processed and are more in their natural form. This includes the natural fiber found in the food. Whole carbs are found in vegetables, whole fruit, whole grains, legumes, potatoes, and mushrooms. Eating real, unprocessed food is important for health purposes.
Mushrooms are also high in fibre, which has many health benefits, including a lower risk of type 2 diabetes. They are also a good source of copper, B vitamins, potassium, and iron. A total of 126 health-related functions are thought to be produced by medicinal mushrooms and fungi. Research is ongoing about the potential for using mushrooms to improve health and to prevent or manage certain health conditions.
However, if you’re considering buying a canned mushroom product, like cream of mushroom soup, be sure to read the nutrition label, as these items will generally be higher in carbs and might not fit into your daily limit.
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Canned mushrooms are higher in carbs
Mushrooms are generally considered to be low in carbohydrates, but there is a notable exception for canned mushrooms. While fresh mushrooms are a great option for those seeking a low-carb food, the canning process appears to increase the carbohydrate content.
Canned mushrooms are indeed higher in carbs than their fresh counterparts. A cup of canned mushrooms typically contains around 7-8 grams of total carbohydrates, while fresh mushrooms usually have closer to 4 grams. This difference is significant, especially for those on a low-carb diet or with specific nutritional goals.
The discrepancy in carb content between canned and fresh mushrooms can be attributed to several factors. One reason may be the addition of preservatives and other ingredients during the canning process, which can increase the overall carb count. Canned mushrooms are often packed in a liquid solution, which may include starches or other carbohydrates that contribute to the total carb content.
Additionally, the canning process itself can alter the natural structure of the mushrooms, potentially breaking down some of the complex carbohydrates into simpler forms that are more readily counted as digestible carbs. This can result in a higher measured carb content in canned mushrooms compared to fresh ones, even if the inherent carbohydrate composition of the mushrooms hasn't changed.
It's worth noting that while canned mushrooms have a higher carb content, they can still be a nutritious option. They are a good source of dietary fiber, and they provide some protein and essential vitamins and minerals. However, for those watching their carbohydrate intake, fresh mushrooms are generally the preferred choice as they offer a more complete nutritional package with lower calories, carbs, and sugar.
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Mushrooms are keto-friendly
Mushrooms are incredibly low in carbs and can be enjoyed both raw and cooked. Common types of mushrooms, like white button, shiitake, oyster, and portobello, are keto-friendly in their natural form. A 1-cup (96-gram) serving of raw, whole white button mushrooms contributes only 3 grams of carbs to your day. A cup of raw oyster and shiitake mushrooms contains around 6 and 7 grams of carbs, respectively. If you like portobello mushrooms, you’ll find around 3 grams of carbs in a 1-cup (86-gram) serving.
Mushrooms are also high in fiber, which can be tough to get on the keto diet since it’s often found in carb-rich foods like fruits, vegetables, and whole grains. In addition to fiber, mushrooms contain several antioxidants, like ergothioneine and glutathione, which can help protect your cells from oxidative damage. They are also a good source of B vitamins, selenium, copper, potassium, and iron.
While mushrooms are keto-friendly, it’s important to check the labels on canned mushroom products, as these items will generally be higher in carbs and might not fit into your daily limit.
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Mushrooms are low in calories
Mushrooms are also a good source of fibre, which can be tough to get on a keto diet since it is found in carb-rich foods. They are also high in B vitamins, selenium, copper, and potassium. Additionally, they contain antioxidants like ergothioneine and glutathione, which can help protect your cells from oxidative damage.
When cooking mushrooms, it is best to sauté, boil, grill, or bake them, as frying or battering them can increase the calorie count. Cooking mushrooms in high-temperature water, such as boiling or microwaving, may cause their water-soluble nutrients like B vitamins and potassium to escape in the water. Therefore, sautéing quickly over high heat or simmering over low heat, such as in soups, are ideal cooking methods for preserving nutrients.
While mushrooms are a healthy option, it is important to note that canned mushroom products, like cream of mushroom soup, are generally higher in carbs and might not fit into a keto diet or daily limit. Similarly, while mushrooms grown in natural sunlight are rich in vitamin D, some wild mushrooms can be poisonous, so it is best to stick to supermarket varieties.
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Frequently asked questions
Mushrooms are not high in carbs. In fact, they are considered to be keto-friendly due to their low carbohydrate content. Common types of mushrooms such as white button, shiitake, oyster, and portobello are low in carbs and can be enjoyed on a keto diet.
Mushrooms are not high in sugar. They are low in calories, have no cholesterol, and are very low in sodium. They are also a good source of fibre, vitamins, and minerals.
The carb content of mushrooms varies slightly by species. For example, one cup of whole white button mushrooms (96 grams) contains around 3 grams of carbohydrates. A cup of raw oyster mushrooms contains around 6 grams of carbs, while a cup of shiitake mushrooms has about 7 grams.
Mushrooms are generally considered healthy and nutritious. However, it's important to note that they contain an indigestible carbohydrate called chitin, which is also found in shrimp and crab shells. Additionally, some species of mushrooms, like the inky cap mushroom, can interact with alcohol and cause unpleasant side effects.

























