Green Juice
Green juice vs smoothie: fibre, sugar and how each is made
Juice and smoothies get shelved together and treated as interchangeable, and the machines that make them tell you why that's wrong. A juicer separates, a blender combines. Everything else, texture, fibre, sugar, how full you feel, follows from that one distinction.
The mechanical difference
A cold press grinds vegetables and squeezes the liquid out under pressure, leaving the fibrous pulp behind. What you get is the vegetable's liquid content, concentrated, with nothing to chew. A blender does the opposite: it breaks everything down and keeps all of it, fibre included, in the glass. Nothing is removed, which is why a smoothie is thick and a juice isn't.
What that means in practice
| Green juice | Green smoothie | |
|---|---|---|
| Fibre | Removed with the pulp | All retained |
| Texture | Light, drinkable | Thick, spoon-adjacent |
| Fullness | Minimal, a drink | Substantial, closer to a meal |
| Vegetable concentration | High: more veg per glass | Lower: volume is taken up by fibre |
| Sugar behaviour | Arrives quickly, no fibre to slow it | Slowed by the fibre alongside it |
| Typical use | Alongside breakfast, a fixed slot | Instead of breakfast |
The concentration point is the one people miss. Because fibre takes up room, a smoothie glass holds less actual vegetable than a juice glass. You can press a great deal more spinach into a bottle than you could comfortably blend and drink. That's the trade in a sentence: juice gives you more vegetable and less fibre, a smoothie gives you the opposite.
The sugar question
In both drinks, sugar comes from the fruit rather than the vegetables, so the recipe matters more than the format. A fruit-heavy smoothie carries plenty of sugar even with its fibre. A vegetable-led juice like Pure Greens carries very little, because there's no fruit in it at all. Where the format does matter is speed: without fibre, juice's sugar arrives faster. That's a reason to keep juice vegetable-led, which we do (more on how fruit sets the sugar level), not a reason to avoid juice.
So which should you drink?
They answer different questions. Take a smoothie when you want breakfast in a glass: something filling, fibre included, that stands in for a meal. Take a green juice when you want a concentrated hit of vegetables alongside food rather than instead of it, most obviously in a fixed morning slot. Neither is the healthy one. The honest answer is that most people would be better off doing both than arguing about which.
Worth knowing: shop-bought smoothies are frequently far more fruit-led than home-made ones, and the fibre in them doesn't cancel that out. Read the ingredients on both. If you're still getting your head around what green juice even is, start with what is green juice?
If juice is the side you want
The green range, lightest to greenest, or the bundle with all five:
Celery Twist250ml / 500mlCelery, apple, cucumber and lemon with a hint of ginger. The lightest way in.from £26.95View →
Balanced Greens250ml / 500mlKale-led and greener, still easy thanks to a little apple.from £26.95View →
Fresh Greens250ml / 500mlSpinach, celery and parsley with apple and lemon. Light and daily.from £26.95View →
Core Greens250ml / 500mlSpinach-led and smooth, with a warming note of ginger.from £26.95View →
Pure Greens250ml / 500mlVegetables only, no fruit. The greenest of the range.from £26.95View →
All The GreensGreen bundleAll five in one box. The easiest way to try the range.from £44.95View →
Frequently Asked
Is a smoothie healthier than a juice?
Neither is inherently healthier. A smoothie keeps the fibre and fills you up, a juice concentrates more vegetable into a glass. The recipe, especially how much fruit is in it, matters more than the format.
Can I blend juice to make it a smoothie?
Not meaningfully, the fibre is already gone. You can blend juice with fruit, yoghurt or oats to make a thicker drink, but you can't put back what the press removed.
Which has more vegetables in it?
Juice, usually by a distance. Fibre takes up volume in a smoothie, so a glass holds less actual vegetable than the equivalent pressed juice.
Which is better for breakfast?
A smoothie, if it's replacing breakfast, since it's filling. A juice works better alongside breakfast rather than instead of it.
The bottom line
A juicer separates, a blender combines, and everything else follows from that. A smoothie is breakfast in a glass, filling and fibre-rich. A green juice is a concentrated hit of vegetables to drink alongside food, lighter and higher in veg per glass. Neither wins. If it's the juice you're after, the vegetable-led end of the range is Pure Greens, and the basics are in what is green juice?
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