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11 Important Health Benefits of Spinach + Nutrition Facts

Curated by Claudia Shannon / Research Scientist / ishonest

Specialty: Weight Loss Nutrition, Female Wellbeing, Sports Nutrition, Corporate Wellness, Whole Food Cooking

Alexandra Dusenberry is registered dietitian nutritionist and certified personal trainer based in San Diego, California. She works with clients around the world to help them reach their health and fitness goals. She believes that food is me... more

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The benefits of spinach are mainly due to its rich plant chemical content and may help improve skin and hair health and assist in cancer treatment (1). This leafy green is a staple across many diets worldwide and is loaded with vitamins, minerals, and antioxidants.

  • What Is The Nutritional Profile Of Spinach?
  • What Are The Health Benefits Of Spinach?
  • How To Include Spinach In Your Diet
  • How To Select And Store Spinach Leaves
  • What Are The Possible Side Effects Of Spinach?

What Is The Nutritional Profile Of Spinach?

The most abundant nutrients in spinach include vitamins A, C, K1, and iron, folic acid, and calcium. It also contains powerful antioxidants, including lutein, zeaxanthin, and quercetin (all of these fight free radicals and reduce oxidative stress).

A hundred grams of spinach contains 23 calories. The amount of spinach also contains 3 grams of protein, 4 grams of carbs, and 2 grams of fiber. Other important nutrients include:

  • 99 mg of calcium
  • 3 mg of iron
  • 79 mg of magnesium
  • 49 mg of phosphorus
  • 558 mg of potassium
  • 28 mg of vitamin C
  • 194 mcg of folate
  • 9380 IU of vitamin A
  • 12200 mcg of lutein and zeaxanthin
  • 483 mcg of vitamin K

These potent nutrients work in synergy to offer the many benefits of spinach. We will discuss them at length in the following section.

What Are The Health Benefits Of Spinach?

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Spinach is full of carotenoids that fight oxidative stress and cancer. The fiber contains also promotes satiety and may help manage diabetes. Calcium promotes bone health, and lutein and zeaxanthin improve vision.

1. May Keep Your Skin, Hair, And Nails Healthy

The vitamin A in spinach can protect the skin from UV radiation. It fights oxidative stress occurring on the dermal layers and promotes skin health. Consuming spinach regularly may give you healthy skin (2).

Spinach contains vitamin C. Several studies show that vitamin C can promote collagen synthesis (499' target='_blank' rel='noopener noreferrer' >3). It also is believed that the magnesium and iron in the vegetable may also promote hair health. Iron deficiencies have been linked to hair loss (4). Spinach, being a rich source of iron, may help combat hair loss.

Spinach also contains biotin, a mineral that helps treat brittle nails (5).

2. May Help With Weight Loss
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Some studies show that spinach may suppress hunger. Overweight women showed a 43% greater loss in body weight after consuming 5 grams of a spinach extract for 3 months (6).

The women also showed a decreased urge to eat sweets by 95%. The spinach extract contained thylakoids, which are membranes usually found in green plants (6).

3. May Reduce Cancer Risk

The glycoglycerolipids in spinach may have a role to play in cancer prevention. They may achieve this by potentially inhibiting tumor growth (7).

As per some studies, vitamin A in spinach is linked to a reduced risk of breast cancer. Spinach intake (or carrots, which are also rich in vitamin A) for more than twice a week has been linked to a modest decrease in breast cancer risk (8).

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Spinach is a cruciferous vegetable. Studies show that cruciferous veggies can play an important role in cancer prevention (9). These veggies are rich in carotenoids (like lutein and zeaxanthin) that may aid cancer treatment.

Cruciferous veggies also release indoles (upon preparation), which inactivate carcinogens and fight inflammation (9).

4. May Aid Diabetes Treatment

Spinach promotes satiety, thereby reducing postprandial (post-meal) glucose responses. This was attributed to the high fiber and water content in the vegetable (10).

Spinach also contains nitrates. These compounds were found to help prevent insulin resistance. They can also relieve inflammation, a primary risk factor for diabetes. Spinach could be a promising ingredient to prevent insulin resistance (11).

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Another reason spinach can be a part of an anti-diabetic diet is its low carb count. Compared to starchy veggies, spinach is a non-starchy vegetable with a low carb count (12). It may also lead to lower blood sugar levels.

Individuals with type 2 diabetes can include spinach in their diet. Its low- carb count may help regulate glucose levels, though this statement needs more research.

5. Helps Regulate Blood Pressure Levels

The nitrates in spinach deserve the credit. These compounds improve endothelial function and may acutely lower blood pressure levels, thereby promoting heart health (13).

Spinach nitrates may also relieve arterial stiffness, which can lead to high blood pressure levels (14).

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Spinach leaf proteins may be useful in the treatment of hypertension. It may also reduce the risk of heart disease (15).

The magnesium in the vegetable also regulates blood pressure levels. This mineral relaxes and widens the blood vessels, thereby promoting blood flow (16).

6. May Boost Vision Health

Spinach contains two important antioxidants, lutein and zeaxanthin, which have been extensively studied for their vision-promoting effects. These compounds fight reactive oxygen species and cut the risk of cataracts and age-related macular degeneration (17).

In a study, regular intake of spinach increased macular pigment optical density (18).

7. May Lead To Strong Bones
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Spinach may maximize bone health. It is rich in vitamin K and calcium, two nutrients important for bone strength (19).

Low calcium intake over a lifetime also leads to osteoporosis. It is linked to low bone mass, rapid bone loss, and high fracture rates. Spinach contains calcium and can help counter this (20).

8. May Promote Digestion

Spinach contains fiber (21). Though it is not a lot, the fiber can offer some benefits.

Research shows that fiber can keep you feeling full for longer. It also promotes regularity as it helps the food move through the digestive system (22).

9. May Help Treat Asthma
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Oxidative stress plays a role in asthma. Spinach contains vitamin C, a potent antioxidant that can combat oxidative stress. This may aid asthma treatment (23).

The lutein and zeaxanthin in the leafy green may also help treat asthma (23). Anecdotal evidence suggests that eating spinach may also keep one from developing asthma.

However, spinach (or other foods) may not be a definitive cure for asthma. More studies are needed to understand the effects of diet on asthma and other allergies (23).

10. May Promote Fetal Development

Spinach contains folic acid, a nutrient essential for fetal development. This nutrient reduces the risk of defects in the unborn childs nervous system (24).

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Some research also suggests that the iron in spinach may help prevent pre-term deliveries and low birth-weight babies. However, information is unclear, and we need more studies in this regard (25).

11. May Boost Brain Function

Spinach may have anti-stress and anti-depressive effects. These effects can be attributed to the ability of spinach to reduce blood levels of corticosterone (a hormone involved in stress responses) (26).

Other nutrients in spinach, namely vitamin K, folate, lutein, and beta-carotene (vitamin A), are also believed to promote brain health and slow down cognitive decline. More research is needed to establish a connection.

Spinach is indeed a superfood. Eating raw spinach as part of a salad can be a good idea. Here are other ways.

How To Include Spinach In Your Diet

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You are doing your body a lot good if you are regularly eating spinach. Including the leafy green in your diet is easy.

  • You can make it a part of your hummus. Cooked spinach tastes great!
  • Make spinach the primary ingredient in your cupcakes.
  • Add spinach to your morning smoothie. You can also grind spinach leaves and prepare a green smoothie/spinach juice.
  • Spinach can also be added to curries. Blanching spinach and adding it to your dishes also works.
  • Spinach can be part of your vegetable salad. Drizzling some olive oil over the salad makes it much healthier.

How To Select And Store Spinach Leaves

Picking locally grown spinach works best. Also, look for the best-before date. You should pick fresh spinach. Keep these points in mind:

  • Go for bright green leaves. Avoid leaves that are brown or yellow or wilted.
  • Choosing spinach stored in a cooler is better (than that stored on a shelf).
  • Remember to keep spinach in the original bag or container and wash only prior to use. Store the remaining spinach in the same bag in the refrigerator, ensuring there is no moisture.
  • Wrapping the bag in a clean towel can offer extra protection.

Though spinach is a powerhouse of nutrients, it comes with certain warnings.

What Are The Possible Side Effects Of Spinach?

Spinach is replete with the essential nutrients. Most of the research has confirmed its health benefits. However, taking excess spinach could cause side effects.

  • May Aggravate Kidney Stones This is the most common concern with spinach. Spinach contains large amounts of oxalates (just like beets and rhubarb). These may bind with calcium in the urinary tract and can lead to calcium oxalate stones (27). Hence, individuals with kidney disease/stones must stay away from spinach.
  • May Interfere With Blood-Thinning Medications The vitamin K in spinach plays a role in forming blood clots. Hence, you must be wary of your vitamin K intake if you are on blood thinners. Spinach, being high in vitamin K, may interfere with medications that help in blood-thinning (including Warfarin) (28). You may need to reduce your consumption of spinach if you are on Warfarin.
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Spinach is one of the healthiest green leafy vegetables packed with iron and beneficial phytonutrients. The benefits of spinach are attributed to its rich antioxidant profile and an array of vitamins and minerals. It may help manage diabetes and weight loss. It also may help promote gut, vision, brain, heart, and bone health. It is good for your hair and skin too. However, excess consumption may interfere with blood-thinning medications or aggravate kidney stones in some individuals. Hence, limit its consumption and seek medical advice if you experience any side effects.

Frequently Asked Questions

How much spinach can you eat in a day?

The ideal dosing of spinach depends on the individual and their health condition. As per anecdotal evidence, one or two cups of spinach (about 60 grams) a day could be a good idea.

Is spinach a keto?

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Yes. Spinach is high in nutrients and low in carbs. Hence, it can be added to a keto diet.

Should you eat spinach raw or cooked?

Raw spinach may have a slightly higher amount of nutrients, though the difference is not a lot. But raw spinach may cause gas. It boils down to your preference and experience.

Is spinach good for weight loss?

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Spinach is low in calories and high in fiber. Though it may not directly aid weight loss, it can be part of a weight loss diet.

How is regular spinach different from baby spinach?

Baby spinach is typically harvested in the early stages of plant growth. The leaves are smaller, and the texture is more tender. Regular spinach has large leaves.

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