Calories in Spinach: Nutritional facts for Spinach Types

The calories in a 100g serving of spinach is 23 calories.

One kilogram of spinach contains 230 calories. Spinach is low in carbs and calories, and high in dietary fiber, water and nutrients.

A cup of spinach (30g) contains 7 calories, zero fat, zero sugar, 1g protein, 1g carbs, and 1g dietary fiber.

The health benefits of spinach are listed below:

• May Help Prevent Cancer: Spinach contains lutein and zeaxanthin, which are antioxidants that help eliminate harmful free radicals from the body. These compounds may lower the risk of cancers affecting the mouth, esophagus, and stomach. A study involving over 490,000 participants  suggested that those who consumed more spinach had a reduced likelihood of developing esophageal cancer. Some research also indicates that the carotenoids in spinach may help lower the risk of ovarian, endometrial, lung, and colorectal cancers.
• Supports Eye Health: Lutein may protect against vision problems like macular degeneration and cataracts. Research suggests lutein shields the eyes from ultraviolet damage. One study found that women with higher lutein intake had a 23% lower risk of developing cataracts compared to those with lower consumption.
• May Help Reduce Blood Pressure: Spinach is a rich source of potassium which plays a key role in regulating blood pressure. Consuming potassium-rich foods like spinach may help lower high blood pressure and support heart health.
• Promotes Healthy Skin: Vitamin A in spinach supports tissue growth, including skin cells. This vitamin helps strengthen the skin’s immune system, protects against damage, and keeps skin hydrated, potentially reducing fine lines and wrinkles.
• Supports Blood Health: Spinach provides a good amount of iron, which is essential for producing hemoglobin. Hemoglobin helps carry oxygen from the lungs to the rest of the body. Low iron levels can lead to fatigue and weakness, making spinach a great option for maintaining healthy blood.
• Strengthens Bones: Spinach is rich in vitamin K, which plays a vital role in bone health. Eating just one cup of spinach provides the recommended daily intake of vitamin K, which is essential for maintaining strong bones and reducing the risk of fractures.

While spinach has many health benefits, consuming it may come with risks especially if consumed in excess. The downsides of spinach are listed below:

• Pesticide Residue Concerns: Spinach is frequently listed among the foods with the highest levels of pesticide residue, according to the Environmental Working Group. This raises concerns about potential long-term exposure to harmful chemicals. Washing spinach thoroughly before consumption can help reduce pesticide intake.
• Risk of Foodborne Illness: Like other leafy greens, spinach can carry bacteria such as E. coli, which may cause foodborne illnesses. Symptoms include severe stomach cramps, diarrhea, and vomiting. While this can affect anyone, people over 65, young children, pregnant individuals, and those with weakened immune systems are at higher risk of severe illness. Cooking spinach helps kill harmful bacteria, but if eating raw, washing and drying it properly is essential.
• Kidney Stone Formation: Spinach is high in oxalic acid, which can bind with calcium in the kidneys and contribute to the formation of kidney stones. People prone to kidney stones should consume spinach in moderation to avoid worsening their condition.
• High Potassium Risks for Kidney Disease Patients: Spinach contains a significant amount of potassium, which can be problematic for individuals with advanced kidney disease. Impaired kidney function can cause potassium to accumulate in the blood, potentially leading to irregular heart rhythms and other serious health complications.

Yes, spinach is a nutritional superfood, packed with essential vitamins and minerals that support overall health. It is rich in vitamin A, vitamin C, vitamin K, iron, folate, and potassium, making it a great addition to a balanced diet. Regularly eating dark, leafy greens like spinach can help protect eye health, lower blood pressure, and reduce oxidative stress, which may lower the risk of chronic diseases like cancer.

While spinach contains 2.7 mg of iron per 100g, which is comparable to the 2.6 mg found in the same amount of red meat, its iron is in the nonheme form, which the body absorbs less efficiently. Oxalic acid in spinach further limits iron absorption, preventing more than 90% of its iron from being used by the body. Despite this, spinach remains a nutrient-dense food that supports immune function, digestion, and overall well-being when included in a varied diet.

No, spinach is generally a highly nutritious vegetable that benefits a person’s overall health. Spinach provides essential vitamins like A, C, K, and B6, along with minerals such as iron, calcium, and magnesium. However, consuming large amounts of spinach may cause certain health concerns, particularly for individuals with specific conditions.

Spinach is rich in oxalates, which can bind to calcium in the intestines and reduce its absorption. In some people, this may contribute to the formation of kidney stones. Spinach also contains purines, which the body converts into uric acid. While purines can trigger gout attacks in some individuals, research suggests that spinach has little impact on gout risk. Those on blood thinners like warfarin should also be mindful of spinach consumption due to its high vitamin K content, which plays a role in blood clotting. Although spinach allergies are rare, some people may experience symptoms such as itching, swelling, or respiratory discomfort. 

A large handful (about 100g) of raw spinach provides essential nutrients like vitamin A for skin and vision, vitamin C for connective tissue growth, and folate for immune support. According to MedicineNet, a small bowl or a cup of spinach a day is safe for most people.

To avoid potential side effects of eating too much spinach, limit intake to around 1 cup of fresh spinach in a smoothie or salad, or 1/2 cup of cooked spinach per day. Although spinach is highly nutritious, excessive consumption can cause digestive issues like bloating and cramping due to its high fiber content. It is also rich in oxalates, which may contribute to kidney stones in some individuals. 

The calorie content of spinach remains relatively constant across different types, such as smooth-leaf, savoy, and semi-savoy, since they share similar nutritional compositions. However, the calorie density can change depending on how spinach is prepared. Raw spinach contains approximately 23 calories per 100 grams, but when cooked, it shrinks as water evaporates. This means a cup of cooked spinach has more calories than a cup of raw spinach simply because more spinach fits into the same volume. While plain boiling does not alter calorie content, added ingredients like oil or butter in sautéed spinach can significantly increase the calories.

Spinach (Spinacia oleracea) is a hardy annual related to beets and Swiss chard. Native to southwest Asia, it was first cultivated in Persia (Iran) over 2000 years ago and used by the Chinese in the 6th century. Arabs brought it to the Spanish around the 11th century and it had spread to the rest of Europe by the 14th century. Spinach was brought to the Americas with the early colonists. 

China consumes the most spinach domestically, with over 28,000 kilotons produced annually. The top importers of spinach in 2022 were Canada ($107M), United States ($105M), United Kingdom ($52.5M), Germany ($44.9M), and Mexico ($27.9M). The U.S. imported 11.15 million kg of spinach in 2023, continuing its long-term trend of increasing fresh-market consumption, particularly in the Northeast and West. The U.S. shows steady per capita spinach consumption, with 80% of fresh spinach and 91% of processed spinach consumed at home. Asian Americans and women over 40 are the highest consumers within the U.S. market.