A wide variety of vegetables, including bell peppers, asparagus, zucchini, and broccoli, can add important nutrients to a low carb diet.

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Photography by Aya Brackett

The definition of a low carb diet varies widely. Most are under 130 grams (g) of carbs per day, and some go as low as 20 g per day.

Vegetables are low in calories but rich in vitamins, minerals, and other important nutrients. In addition, many are low in carbs and high in fiber, making them ideal for low carb diets.

Here is a list of the 20 best low carb vegetables to include in your diet.

Bell peppers, also known as sweet peppers or capsicums, are incredibly nutritious.

They contain antioxidants called carotenoids, which may help:

  • reduce inflammation
  • decrease cancer risk
  • protect against oxidative damage from cholesterol and fats

One cup (149 g) of chopped red pepper contains 9 g of carbs, 3 g of which are fiber.

This serving size also provides 26% of the Daily Value (DV) for vitamin A and 212% of the DV for vitamin C, which is often lacking in very low carb diets.

Green, orange, and yellow bell peppers have similar nutrient profiles, although their antioxidant contents may vary.

A 2021 animal study found that broccoli may help decrease insulin resistance, which could help in the management of type 2 diabetes.

Broccoli may also help protect against several types of cancer, including prostate cancer.

One cup (91 g) of raw broccoli contains 6 g of carbs, 2 g of which are fiber.

It also provides 90% of the DV for vitamin C and 77% of the DV for vitamin K.

Asparagus is a delicious spring vegetable.

One cup (180 g) of cooked asparagus contains 7 g of carbs, 4 g of which are fiber. It’s also a good source of vitamins A, C, and K.

Animal studies suggest that asparagus may help improve cognitive performance and brain health.

Mushrooms are extremely low in carbs.

A one-cup (70-g) serving of raw white mushrooms contains just 2 g of carbs, 1 g of which is fiber.

In a 2016 study involving males with metabolic syndrome, eating 3.5 ounces (100 g) of white mushrooms for 16 weeks significantly improved antioxidant and anti-inflammatory markers.

Zucchini is a popular vegetable and the most common type of summer squash.

One cup (124 g) of raw zucchini contains 4 g of carbs, 1 g of which is fiber. It’s a good source of vitamin C, providing 25% of the DV per serving.

Yellow Italian squash and other types of summer squash have carb counts and nutrient profiles similar to zucchini.

Spinach is a leafy green vegetable that provides major health benefits.

Research suggests it may help protect heart health, lower blood pressure, and decrease the risk of common eye diseases like cataracts and macular degeneration.

One cup (180 g) of cooked spinach provides more than seven times the DV for vitamin K.

Spinach is also low in carbs, but the carbs become more concentrated as the leaves are cooked down and lose their volume.

For example, one cup of cooked spinach contains 7 g of carbs with 4 g of fiber, whereas one cup of raw spinach contains 1 g of carbs with almost 1 g of fiber.

Avocados are a unique and delicious food.

Although technically a fruit, avocados are typically consumed as vegetables. They’re also high in fat and contain very few digestible carbs.

A one-cup (150-g) serving of chopped avocados has 13 g of carbs, 10 g of which are fiber.

Research suggests that eating avocados may help lower your risk of cardiovascular disease and coronary artery disease. They may also help lower LDL (bad) cholesterol and triglyceride levels.

Cauliflower has a mild taste and is often used as a substitute for higher carb foods like potato and rice.

One cup (107 g) of raw cauliflower contains 5 g of carbs, 2g of which are fiber. It’s also high in vitamin K and provides 57% of the DV for vitamin C.

Like other cruciferous vegetables, cauliflower may help reduce your risk of heart disease and cancer.

Green beans are sometimes referred to as snap beans or string beans.

They’re a member of the legume family, along with beans and lentils. However, they have significantly fewer carbs than most legumes.

A one-cup (125-g) serving of cooked green beans contains 10 g of carbs, 4 g of which are fiber.

Green beans contain carotenoids, which are associated with improved brain function during aging.

Lettuce is one of the lowest-carb vegetables around.

One cup (47 g) of lettuce contains 2 g of carbs, 1 g of which is fiber.

Depending on the type of lettuce, it may also be a good source of certain vitamins.

For instance, romaine and other dark-green varieties are rich in vitamins A and K.

They’re also high in folate. Folate helps decrease levels of homocysteine, a compound linked to an increased risk of heart disease.

Garlic is known for its beneficial effects on immune function.

Research suggests it may boost resistance to the common cold and decrease blood pressure.

Although it’s a high carb vegetable by weight, the amount typically consumed in one sitting is very low due to its strong taste and aroma.

One clove (3 g) of garlic contains 1 g of carbs, part of which is fiber.

Kale is a vegetable loaded with antioxidants, including quercetin and kaempferol.

These antioxidants contain several compounds that could help reduce inflammation, oxidative stress, and infections.

One cup (21 g) of raw kale contains 1 g of carbs, which is mostly fiber. It also provides 68% of the DV for vitamin K and 22% of the DV for vitamin C.

Cucumbers are low in carbs and very refreshing.

One cup (104 g) of chopped cucumber contains 4 g of carbs, less than 1 g of which is fiber.

Although cucumbers aren’t very high in vitamins or minerals, they contain a compound called cucurbitacin E, which may benefit health.

Animal studies suggest that it may have anticancer and anti-inflammatory properties and may protect brain health.

Brussels sprouts are another tasty cruciferous vegetable.

A half-cup (78-g) serving of cooked Brussels sprouts contains 6 g of carbs, 2 g of which are fiber.

It also provides 53% of the DV for vitamin C and 91% of the DV for vitamin K.

Celery is extremely low in digestible carbs.

A one-cup (101-g) serving of chopped celery contains 3 g of carbs, 2 g of which are fiber. It’s a good source of vitamin K, providing 25% of the DV.

In addition, it contains luteolin, an antioxidant that shows potential for preventing and helping treat cancer.

Tomatoes have numerous impressive health benefits.

Like avocados, they are technically fruits but usually consumed as vegetables.

They’re also low in digestible carbs. One cup (149 g) of cherry tomatoes contains 6 g of carbs, 2 g of which are fiber.

Tomatoes are a good source of vitamins A, C, and K. They’re also high in potassium, which can help reduce blood pressure and decrease stroke risk.

Radishes are Brassica vegetables with a sharp, peppery taste.

One cup (116 g) of raw sliced radishes contains 4 g of carbs, 2 g of which are fiber.

They’re fairly high in vitamin C, providing 20% of the DV per serving.

Radishes contain isothiocyanates, which slow the growth of breast cancer cells in test tube studies.

Onions are a pungent, nutritious vegetable.

Although they’re fairly high in carbs by weight, people usually consume them in small amounts because of their robust flavor.

A half-cup (58 g) of sliced raw onions contains 5 g of carbs, 1 g of which is fiber.

Onions are high in the antioxidant quercetin, which may lower blood pressure.

Eggplant is a common vegetable in many Italian and Asian dishes.

A one-cup (99-g) serving of chopped, cooked eggplant contains 8 g of carbs, 2 g of which are fiber.

It’s not very high in most vitamins or minerals. However, animal research suggests eggplant may help lower cholesterol and improve other markers of heart health.

Cabbage has some impressive health benefits.

As a cruciferous vegetable, it may help reduce the risk of certain cancers, such as breast cancer.

One cup (89 g) of chopped raw cabbage contains 5 g of carbs, 2 g of which are fiber.

It also provides 36% of the DV for vitamin C and 56% of the DV for vitamin K.

Artichokes are delicious and nutritious.

One medium-sized globe artichoke (120 g) contains 14 g of carbs. However, 7 g come from fiber, making it fairly low in digestible carbs.

Artichokes may have numerous health benefits, such as lowering blood pressure, cholesterol, and blood sugar levels.

What are the lowest-carb vegetables?

Some vegetables with the lowest amount of carbohydrates include mushrooms, zucchini, cauliflower, lettuce, kale, and cucumbers.

What are 5 foods to avoid on low carb diet?

Some foods to limit on a low carb diet include refined grains, sweets, highly processed foods, sugar-sweetened beverages, and low fat products.

What foods fill you up but are low in carbs?

Foods high in protein and healthy fats are typically low in carbs but can fill you up. These may include eggs, cottage cheese, chicken, avocados, fish, some nuts, Greek yogurt, and shellfish, among others.

What vegetables are high in carbs to avoid?

Some vegetables high in carbs may include starchy vegetables, such as potatoes, sweet corn, and peas. That said, you don’t have to avoid eating these vegetables.

There are many tasty vegetables you can include in a low carb diet.

In addition to being low in carbs and calories, they may reduce your risk of various diseases and improve your overall health and well-being.