What is the healthiest green to put in a smoothie?

Smoothies are a delicious and nutritious way to get your daily intake of fruits and vegetables. While fruits often take center stage in smoothies, adding leafy greens can provide a boost of vitamins, minerals, and antioxidants. But with so many options for leafy greens available, how do you know which ones are the healthiest to blend into your smoothies?

The Benefits of Leafy Greens in Smoothies

All leafy green vegetables provide nutritional benefits, but some stand out above the rest. In general, leafy greens are packed with fiber, vitamins, minerals, and plant compounds like antioxidants. When you add them to smoothies, you increase the nutrient density substantially. Here are some of the top benefits of adding leafy greens to your smoothies:

  • Fiber – Leafy greens are loaded with fiber, which supports digestion and heart health.
  • Vitamin A – Leafy greens contain vitamin A precursors called carotenoids which are great for eye and skin health.
  • Vitamin C – Many leafy greens provide a day’s worth of immune-boosting vitamin C per serving.
  • Vitamin K – Leafy greens are among the best sources of vitamin K, which supports bone and heart health.
  • Antioxidants – Antioxidants in leafy greens combat inflammation and protect cells from damage.
  • Nitrates – Leafy greens contain nitrates that may improve circulation and lower blood pressure.
  • Iron – Adding leafy greens to smoothies helps prevent iron deficiency, especially for vegetarians and vegans.
  • Phytonutrients – Greens provide a variety of beneficial plant compounds that reduce disease risk.

With all these nutrients and health benefits, it’s clear that adding greens to your smoothies is a smart choice. But are some greens healthier than others? Let’s look at some of the top options.

The Top Healthy Leafy Greens for Smoothies

Here are some of the best choices when it comes to selecting leafy greens for smoothies:


This classic leafy green is one of the most nutritious ingredients you can add to a smoothie. Just one cup of raw spinach knocks out your daily vitamin K requirement and provides over half the recommended vitamin A. It also supplies vitamin C, folate, manganese, magnesium, iron, and antioxidants like beta-carotene and lutein. And with almost no calories, spinach packs a huge nutritional punch without adding extra calories. Baby spinach tends to have a milder flavor than mature spinach, making it ideal for smoothies.


Kale deserves its superfood status, with ample amounts of vitamins A, C, and K, cancer-fighting sulforaphane, anti-inflammatory omega-3 fats, and eye-protecting lutein and zeaxanthin. Curly kale has a robust, earthy flavor, while baby kale is more delicate. For smoothies, consider removing the fibrous stems and giving the leaves a quick massage first to soften them up.

Romaine Lettuce

The nutrition in romaine lettuce rivals that of spinach and kale. One cup of shredded romaine supplies over 80% of the recommended intake for vitamins A and K. It also provides a hefty dose of folate, fiber, manganese, and chromium. Romaine has a very mild, watery taste that blends up nicely in smoothies.

Swiss Chard

Both the leaves and stems of Swiss chard contain potent antioxidants like kaempferol that reduce inflammation and oxidative stress in the body. Swiss chard also provides lots of vitamins A, C, and K. The leafy greens have an earthy taste, while the stems are slightly sweet.

Bok Choy

Also known as Chinese cabbage, bok choy is full of glucosinolates, sulfur compounds that may inhibit cancer growth. It also contains important carotenoids like beta-carotene and lutein. Bok choy has a mild, watery taste perfect for smoothing out stronger flavored ingredients.

Collard Greens

Like other dark leafy greens, collard greens are an exceptional source of calcium, magnesium, potassium, vitamin K, and various antioxidants. The sturdy leaves also provide cholesterol-lowering soluble fiber. Collard greens have a slightly bitter, earthy taste.

Beet Greens

While beets get most of the superfood hype, the leafy green tops are edible too. Beet greens contain even higher levels of nutrients like vitamin K, potassium, and magnesium than the root vegetable. The leaves are also rich in nitrates that boost circulation. Beet greens have an earthy, mineral-like taste.

Dandelion Greens

Nutritionally similar to spinach, dandelion greens are loaded with vitamins A, C, K and folate, along with calcium, iron, and potassium. These leaves get their bitter, peppery flavor from antioxidants like caffeic acid. Dandelion greens can help stimulate digestion as well.


Known for its peppery bite, arugula balances the sweetness of fruits in a smoothie. It provides an ample supply of vitamin K, folate, flavonoid antioxidants, and nitrates. The distinct spice of arugula makes it an excellent addition to green smoothies.

Choosing the Best Greens for Your Smoothie Goals

When selecting which leafy greens to use in your smoothies, consider your particular health goals. Here’s a breakdown of the best greens to use for different purposes:

For Immunity – Kale, Spinach, Romaine

These greens deliver a huge dose of immune-strengthening vitamins A, C, and antioxidants.

For Bone Health – Kale, Spinach, Collard Greens

Excellent sources of calcium and vitamin K to support bone density.

For Heart Health – Romaine, Arugula, Spinach

Contain nitrates and omega-3s that improve circulation and blood pressure.

For Lowering Cholesterol – Romaine, Spinach

Provide soluble fiber that removes cholesterol from the body.

For Detoxification – Bok Choy, Beet Greens, Dandelion Greens

Sulfur compounds help the liver flush out toxins.

For Reducing Inflammation – Kale, Bok Choy, Dandelion Greens

Packed with antioxidants that soothe inflammation and oxidative damage.

For Eye Health – Spinach, Kale, Romaine

Rich sources of lutein and zeaxanthin to protect vision.

For Digestion – Romaine, Bok Choy, Dandelion Greens

Provide prebiotics, fiber, and compounds that stimulate healthy digestion.

For Anemia – Spinach, Collard Greens, Beet Greens

Great plant-based sources of iron to prevent deficiency.

For Cancer Prevention – Kale, Bok Choy, Beet Greens

Contain compounds like sulforaphane that may inhibit cancer cell growth.

Combining Greens for Maximum Nutrition

While all leafy greens provide nutritional benefits, you can maximize the nutrient diversity in your smoothies by combining a few different types. Here are some tasty combinations:

  • Spinach + Kale + Swiss Chard
  • Romaine + Bok Choy + Collard Greens
  • Spinach + Beet Greens + Dandelion Greens
  • Kale + Bok Choy + Arugula

Mixing up the greens ensures you get a wide spectrum of vitamins, minerals, phytochemicals, fiber, and antioxidants in each smoothie. Rotate different combinations to reap the unique benefits of each leafy green.

Watch Out for Oxalates in Leafy Greens

While leafy greens are incredibly healthy, some contain moderate to high levels of oxalates. Oxalates are antinutrients that can bind to minerals like calcium and iron in the body, preventing absorption. People prone to kidney stones may want to limit high-oxalate greens like spinach, beet greens, and Swiss chard.

That said, blending greens helps break down oxalates, increasing mineral bioavailability. As long as you vary your leafy greens and drink smoothies in moderation, oxalates in greens should not be a major concern for most people.

Best Practices for Adding Greens to Smoothies

Here are some tips for incorporating leafy greens into your smoothies successfully:

  • Start with milder greens like spinach and romaine if new to green smoothies.
  • Remove fibrous stems and ribs from greens like kale and chard.
  • Briefly massage or wilt tougher greens to soften them before blending.
  • Add just a handful of greens at first, then work up to one to two packed cups.
  • Blend greens with fruits, juices, yogurt, or milk to balance flavor.
  • Sweeten with bananas, apples, berries, dates, or a little honey if needed.
  • Use a high-powered blender for best results breaking down greens.
  • Drink green smoothies immediately for maximum nutrition.
  • Wash greens well, especially if using in raw smoothies.

Sample Green Smoothie Recipes

Here are a few tasty, nutritious green smoothie recipes to get you started:

Ultimate Green Smoothie

  • 1 cup coconut water or almond milk
  • 1 banana
  • 1 cup baby spinach
  • 1/2 cup kale leaves
  • 1/4 avocado
  • 1 tbsp ground flaxseed
  • 1 cup frozen mango chunks

Green Berry Power Smoothie

  • 1 cup unsweetened almond milk
  • 1 cup mixed berries
  • 1/2 cup Greek yogurt
  • 1/2 banana
  • 1 cup baby kale
  • 1 tbsp almond butter

Green Piña Colada Smoothie

  • 1 cup light coconut milk
  • 1/2 cup fresh pineapple chunks
  • 1/4 avocado
  • 1 cup baby spinach
  • 1 tbsp shredded coconut

Chocolate Green Smoothie

  • 1 cup almond milk
  • 1 banana
  • 2 tbsp cocoa powder
  • 1/4 cup plain Greek yogurt
  • 1 cup kale or spinach
  • 1 tbsp almond butter

Frequently Asked Questions

Do green smoothies taste bad?

Green smoothies can be delicious and flavorful when you use ripe produce like bananas and berries and add ingredients like yogurt, nut butters, and cocoa powder. Starting with mild greens like spinach helps as you get used to the flavor. Many great green smoothie recipes hide the taste of greens.

Can you put too many greens in a smoothie?

It is hard to overdo it when adding most leafy greens to smoothies. However, bitter greens like dandelion and arugula can overpower smoothies, so use them sparingly or balance with sweeter fruits. Limit high-oxalate greens like spinach to two cups per smoothie.

What is the healthiest smoothie?

In general, a healthy smoothie contains leafy greens, fresh or frozen fruit, a liquid like yogurt or milk, and seeds, nut butter, or oats for healthy fats and fiber. Spinach, kale, berries, banana, yogurt, and chia seeds make an ideal nutrient-dense smoothie.

Are raw or cooked greens better in smoothies?

Raw greens retain more nutrients like vitamin C and enzymes but can be harder to break down. Lightly cooking greens helps release more antioxidants and makes them blend more smoothly. So cooked and raw both have benefits.

The Bottom Line

It’s hard to go wrong when choosing leafy greens for smoothies, as they are all packed with fiber, vitamins, and antioxidants. Spinach, kale, and romaine lettuce are all excellent options. Mix up your greens to get a diversity of nutrients and flavors. Add just a handful at first until your taste buds adjust to the earthy, plant-based flavors. With heaps of nutrition and endless flavor combinations, greens should be a smoothie staple.

Green Key Nutrients Health Benefits
Spinach Vitamin A, vitamin K, folate, magnesium Immunity, bone health, heart health
Kale Vitamin C, vitamin K, omega-3s, calcium Immunity, detoxification, inflammation
Romaine Vitamin A, vitamin K, folate, manganese Heart health, cholesterol control
Swiss Chard Vitamin K, antioxidants like kaempferol Inflammation, oxidative stress
Bok Choy Vitamin C, beta-carotene, glucosinolates Cancer prevention, digestion
Arugula Vitamin K, folate, nitrates, flavonoids Heart health, balancing sweetness

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