Green smoothie with hemp seeds and spinach – a morning detox

Five minutes, one blender, and you have a glass of green energy that is truly different from sweet fruit juices. Spinach provides chlorophyll and iron, hemp seeds complement the protein to a complete amino acid profile, and banana adds creaminess without artificial thickeners. Did you know that hemp seeds contain about 31 g of protein per 100 g – more than chia and flaxseed combined? In this recipe, I will show you how to make a green smoothie that actually keeps you full until noon.

KEY INFORMATION
• Hemp seeds contain about 31 g of protein/100 g with a complete amino acid profile – all 9 essential amino acids (House et al., Food Chemistry, 2010).
• GLA (gamma-linolenic acid) in hemp seeds: about 2–4 g/100 g – a rarely found plant component that supports hormone function (Oomah et al., Food Chemistry, 2002).
• The omega-6 to omega-3 ratio in seeds: about 3:1 – close to the optimal ratio for humans recommended by WHO (max 4:1).
• Iron from spinach is absorbed 3× better in the presence of vitamin C – lemon juice in the smoothie is not a coincidence.

Why is it worth making a green smoothie with hemp seeds?

A green smoothie without protein is practically a sweet drink, after which blood sugar spikes and drops just as quickly. Hemp seeds solve this problem: 25 g of seeds provide about 8 g of protein, 13 g of fat, and only 1 g of carbohydrates. Leidy et al. (American Journal of Clinical Nutrition, 2015) demonstrated that a breakfast containing at least 25–30 g of protein reduces hunger throughout the day by about 15–20%. A banana-spinach smoothie does not reach this threshold – with hemp seeds, it gets much closer.

Spinach brings non-heme iron, magnesium (about 79 mg/100 g), and folate needed for DNA synthesis. The problem with spinach is oxalates that reduce iron absorption – lemon juice in the recipe intentionally compensates for this, as vitamin C converts non-heme iron into a more absorbable form. This detail makes a difference when you drink this smoothie regularly.

We noticed in tests that frozen spinach yields better results than fresh when blended at high speeds – the leaves do not heat up, the color remains intensely green, and the consistency is thicker without the need to add ice. Fresh spinach works just as well, but frozen is a better logistical option: you always have it on hand.

Nutritional values – what does one glass provide?

One serving of the smoothie (30 g of spinach + 25 g of hemp seeds + 1/2 banana + 200 ml of almond milk + lemon juice) provides about 300 kcal, 12 g of protein, 14 g of fat (mainly PUFA), and 28 g of carbohydrates. The macronutrient composition is similar in proportions to oatmeal with milk, but with a significantly higher content of omega fats.

Ingredients – what do you need?

All ingredients are available in supermarkets or health food stores. You can find hemp seeds in organic stores or online:

• 30 g of fresh or frozen spinach (about 2 handfuls)
• 1/2 ripe banana (ripe – brown spots indicate optimal sweetness)
• 25 g of shelled hemp seeds (about 2.5 tablespoons)
• 200 ml of plant-based milk (almond, oat, or soy)
• 1 teaspoon of fresh lemon juice
• optional: 1 cm piece of fresh ginger
• optional: 1 teaspoon of honey or agave syrup
• a few ice cubes (if you want a more refreshing smoothie)

How to prepare a green smoothie – step by step?

Cały proces zajmuje 5 minut. Możesz przygotować wieczorem „smoothie bag” – zamrozić porcje szpinaku i banana w woreczkach i rano wrzucić je prosto z zamrażarki do blendera.

Step 1. Prepare the ingredients. Rinse the spinach if it's fresh. Peel the banana and cut it into smaller pieces – the blender will handle them better than a whole fruit. Measure out 25 g of hemp seeds.

Step 2. Load the blender correctly. First, pour the plant milk at the bottom – this reduces resistance and protects the blade. Add the spinach on top of the milk, then the hemp seeds and banana. The lemon juice and ginger go in last.

Step 3. Blend until smooth. Blend for 45–60 seconds on the highest speed. If you have a low-powered blender, stop after 30 seconds and stir with a spoon, then blend again. The hemp seeds are soft – they will blend smoothly without special equipment.

Step 4. Check the consistency. If the smoothie is too thick, add cold water tablespoon by tablespoon. If it's too thin – add a few ice cubes and blend again. The right consistency: it pours out of the blender, but doesn't flow like water.

Step 5. Season to taste. Taste it. Add honey if you want a sweeter flavor, more lemon juice if you prefer a tangy taste. Ginger adds spiciness and stimulates digestion – a 1 cm piece is the sweet spot between pleasant and overwhelming.

Step 6. Pour and serve. Pour the smoothie into a tall glass. Sprinkle the top with a pinch of hemp seeds for decoration and extra crunch. Drink immediately or store for a maximum of 24 hours in the fridge in a tightly sealed jar. If you want to learn more about the properties of hemp seeds, read our article oatmeal with hemp seeds.

Tips and variations

Green smoothie is a recipe that can easily be adapted to the season, taste preferences, and nutritional goals. Here are a few variations we've tested:

Protein version. Replace part of the hemp seeds with a tablespoon of hemp protein (10–15 g protein/tablespoon) or add both. This portion then provides over 20 g of protein – close enough to the satiety threshold from research by Leidy et al. Check out our article on smoothie bowl with hemp seeds, if you want a thicker breakfast version.

Winter version. Instead of banana, use 100 g of frozen mango or pineapple – the tropical sweetness masks the bitter aftertaste of winter spinach, which is more intense than summer spinach. Add 1/2 teaspoon of turmeric and a pinch of black pepper – piperine from the pepper increases the bioavailability of curcumin.

Without banana. If you avoid fructose, replace the banana with 100 g of avocado. The smoothie will be less sweet, but creamy and even more filling thanks to the monounsaturated fats from the avocado. Sweeten with a teaspoon of erythritol or stevia.

Common mistakes. Too little liquid – the result is a paste that's hard to drink. Always start with 200 ml of milk, and then assess if you need more. The second mistake: forgotten lemon. Without it, the spinach oxidizes faster after blending and the smoothie turns gray within fifteen minutes.

Frequently asked questions

Is green smoothie with hemp seeds suitable for detox?

The green smoothie supports the natural detoxification processes of the liver thanks to chlorophyll from spinach and gamma-linolenic acid (GLA) from hemp seeds – Oomah et al. (Food Chemistry, 2002) confirm that hemp seeds contain about 2–4 g of GLA per 100 g. This is not a medical detox, but valuable support for a daily diet.

How many calories are in a green smoothie with hemp seeds?

One serving (spinach + 1/2 banana + 25 g of seeds + 200 ml of almond milk) provides about 290–320 kcal, 12 g of protein, 14 g of fat, and about 28 g of carbohydrates. It's a light, nutritious breakfast suitable for active individuals who also care about their figure.

Can you freeze a smoothie with hemp seeds?

Yes – store the blended smoothie in an airtight jar in the freezer for up to 1 month or in the refrigerator for up to 24 hours. Shake before drinking. Hemp seeds freeze well – USDA FoodData Central confirming the stability of fatty acids under refrigeration conditions.

What can replace spinach in a green smoothie?

Kale (higher vitamin K content), iceberg lettuce (neutral taste), parsley (rich in iron and vitamin C), or arugula (slightly bitter). Blend kale longer – it’s tougher. Each option provides chlorophyll and minerals that complement hemp seeds.

When is the best time to drink a green smoothie?

Best in the morning, as the first breakfast or right after waking up. The protein from hemp seeds and fiber from spinach stabilize glucose levels for several hours – Leidy et al. (AJCN, 2015) demonstrated that morning protein reduces appetite throughout the day by about 15–20%.

This article is for informational and educational purposes and does not replace consultation with a doctor. If you are pregnant, breastfeeding, taking medications, or have chronic conditions, consult the use of supplements or herbs with a specialist.

Author: Michał Waluk · Published: 2026-05-04 · Updated: 2026-05-04