Gym-goers looking for convenient protein
A ready-to-drink option may appeal when food is not immediately convenient after training. Check the protein per bottle rather than assuming a fruit smoothie supplies enough for your wider meal or snack.
Who is this choice for?
The useful choice depends on whether you need convenient carbohydrate, a stated amount of protein, or simply a fruit-and-vegetable drink after activity.
Shoppers comparing sugar claims
Compare the sugars figure with the volume you plan to drink. UK government guidance classifies sugars naturally present in smoothies as free sugars, even when a product says “no added sugar”.
Fruit-and-vegetable smoothie buyers
If fruit and vegetable ingredients are the main attraction, a conventional smoothie may fit. NHS guidance counts up to 150ml of juice and smoothies combined as one 5 A Day portion, regardless of a larger bottle's serving suggestion.
What should you check before buying?
Decide what the drink needs to contribute after your particular session, then compare the nutrition panel at the portion you intend to have.
Protein-enriched smoothie
Choose it when: You want a ready-to-drink smoothie with a stated protein contribution; the Naked Pineapple & Mango example uses pea protein and is labelled vegan.
Bear in mind: Protein enrichment does not make the drink sugar-free or turn a full bottle into an NHS-sized smoothie portion.
Ordinary fruit-and-vegetable smoothie
Choose it when: Fruit-and-vegetable ingredients matter more to you than a substantial protein contribution; Waitrose lists Innocent Green Energise as vegan and a source of fibre.
Bear in mind: Waitrose lists 1.3g protein and 11g sugars per 100ml for that no-added-sugar product.
Smoothie alongside food
Choose it when: You enjoy a smoothie but want to plan the rest of your post-workout food separately, particularly when another training session is close.
Bear in mind: This takes another food choice or preparation step; the British Dietetic Association emphasises carbohydrate refuelling when quick recovery is needed after repeated exercise.
| Priority | What to check | Your needs |
|---|---|---|
| Carbohydrate | Read carbohydrate per labelled serving and check whether that serving matches what you will drink. Consider how soon you need to recover before exercising again. | When training sessions are close together, I want to know what carbohydrate the drink contributes. The British Dietetic Association advises starting carbohydrate refuelling promptly when quick recovery is required. |
| Protein | Compare protein per labelled serving, not just per 100ml. Sainsbury's lists 11g per 300ml bottle for Naked Protein Machine; Waitrose lists 1.3g per 100ml for Innocent Green Energise, so check the different measurement bases. | If protein is part of my post-workout plan, I need a stated amount rather than relying on the word “smoothie”. For a vegan choice, I would also check the ingredients and pack declaration. |
| Sugars and portion | Read “of which sugars” and the volume you intend to drink; “no added sugar” is not “zero sugar”. NHS guidance limits juice and smoothies combined to 150ml a day. | I want to understand the sugars in my actual portion, not just the front-of-pack claim. UK government guidance treats sugars naturally present in smoothies as free sugars. |
| Storage and pack size | Check whether the bottle needs refrigeration and read its after-opening instructions. Choose a pack size that fits when you expect to use it. | A drink I take away from home needs storage arrangements that work for that day; I may prefer a smaller pack if I will not finish a larger one promptly. |
Common smoothie buying mistakes
-
Reading “no added sugar” as “sugar-free”
UK government guidance includes sugars naturally present in smoothies among free sugars. Waitrose lists 11g sugars per 100ml for Innocent Green Energise, despite its no-added-sugar label.
Compare the “of which sugars” figure for the amount you intend to drink, rather than relying on the front of the pack.
-
Treating a whole bottle as one 5 A Day portion
NHS guidance counts a combined 150ml of fruit juice and smoothies as one 5 A Day portion and advises limiting the combined daily amount to 150ml. A 300ml bottle is larger than that amount.
Decide your portion before opening a larger bottle, and follow the pack's storage instructions for any remainder.
-
Assuming fruit smoothies contain substantial protein
Protein varies by recipe and measurement basis. Sainsbury's lists 11g per 300ml bottle for pea-protein-enriched Naked Protein Machine, while Waitrose lists 1.3g per 100ml for Innocent Green Energise.
If protein matters to your post-workout food choice, check the amount per portion you will have and consider what the rest of your food provides.
-
Buying a large bottle without a storage plan
An opened chilled smoothie needs to be handled according to its own pack instructions. A bottle you cannot refrigerate or finish within its stated period may not fit your plans.
Check the storage and after-opening directions before choosing a pack size, particularly if you intend to take it to the gym.
Brands and retailers to recognise
These examples show why the exact recipe and nutrition panel matter more than a brand name alone; a retailer's range does not establish the contents of every smoothie it sells.
Naked
Its Protein Machine Pineapple & Mango line includes pea protein and is labelled suitable for vegans in the Tesco and Sainsbury's listings.
- Sainsbury's lists 11g protein and 23g carbohydrate per 300ml bottle; Tesco lists 10g protein and 26g carbohydrate per 300ml serving of its 750ml product.
- Those listings also give 18g and 21g sugars respectively on their stated 300ml bases. Check the exact pack rather than assuming the two formats have identical nutrition.
Innocent
Waitrose lists Green Energise as a vegan, no-added-sugar fruit-and-vegetable smoothie and a source of fibre.
- The listing states a 150ml serving, making it straightforward to compare the suggested portion with NHS juice-and-smoothie guidance.
- Its panel lists 1.3g protein and 11g sugars per 100ml; no added sugar does not mean zero sugar.
Tesco
Tesco Groceries lists the 750ml Naked Protein Machine Pineapple & Mango smoothie.
- That listing gives nutrition per 300ml serving, including protein, carbohydrate and sugars.
- Use the nutrition panel of the particular smoothie and pack size you are considering; the Naked listing does not describe other Tesco products.
Sainsbury's
Its smoothie range includes own-label fruit smoothies and branded options, including Naked Protein Machine.
- The Naked Pineapple & Mango 300ml listing states protein, carbohydrate and sugars per bottle.
- Those figures belong to that specific bottle; check other recipes and sizes individually.
M&S
M&S Food lists ready-made smoothies in 350ml and 750ml formats, including some blends with yoghurt, dates or oats.
- Its Very Berry Smoothie panel states 1.0g protein, 13.1g carbohydrate and 11.5g sugars per 100g.
- The Very Berry figures should not be applied to M&S smoothies with different ingredients.
Waitrose
Waitrose lists Innocent Green Energise, a fruit-and-vegetable smoothie with a stated 150ml serving.
- Its listing provides per-100ml protein and sugars figures for comparing the recipe with your intended portion.
- The no-added-sugar wording does not erase the 11g sugars per 100ml shown on that product's panel.
Fruit smoothie option on Joybuy
This coconut milk and papaya smoothie is a fruit drink to consider alongside other post-workout food, rather than a protein-enriched smoothie.
No image available
Nootz Coconut Milk Smoothie Papaya 180ml
If you want a papaya smoothie alongside post-workout food, this is a 180ml pack rather than a protein-enriched option. The pack is larger than the NHS-advised 150ml daily combined amount for juice and smoothies; check its current nutrition and storage label when deciding how much to have.
Frequently asked questions
Does “no added sugar” mean a smoothie contains no sugar?
No. A no-added-sugar smoothie can still list sugars on its nutrition panel. UK government guidance classifies sugars naturally present in smoothies as free sugars, so check “of which sugars” and the portion you plan to drink.
How much smoothie counts towards 5 A Day?
NHS guidance counts a combined total of up to 150ml of fruit juice and smoothies as one 5 A Day portion and advises limiting their combined daily amount to 150ml. It advises having them with meals rather than between meals to reduce tooth-decay risk.
Is a fruit smoothie enough after every workout?
Not necessarily: assess it as part of the food and drink you have after exercise. The British Dietetic Association emphasises prompt carbohydrate refuelling when quick recovery is needed, particularly for repeated training or competition; an ordinary fruit smoothie does not automatically provide a substantial amount of protein.
What should a vegan shopper check in a post-workout smoothie?
Check the pack's vegan declaration, ingredients, allergen information, protein per labelled serving and sugars. Sainsbury's lists the pea-protein-containing Naked Protein Machine 300ml bottle as vegan, while Waitrose also lists Innocent Green Energise as vegan; their protein figures use different serving bases.