For exercise lasting more than an hour, a high-protein soya drink can contribute more protein to a recovery snack than the reviewed Tesco and Waitrose unsweetened cartons, according to their product labels; the British Heart Foundation advises considering protein alongside carbohydrate after longer sessions. For shorter sessions or everyday use, an unsweetened fortified carton may suit you if protein comes from other food. A long-life multipack changes how much you buy and store, not the nutrition of each carton.
If your session lasts more than an hour, you may want the drink to contribute protein to a snack or meal that also contains carbohydrate. The British Heart Foundation advises considering both after longer exercise; compare protein for the amount you will actually drink.
An unsweetened fortified drink may suit routine use when other foods provide protein. Check the particular carton for sugars, protein and added nutrients rather than assuming all unsweetened drinks have the same composition.
A long-life pack offers several cartons for cupboard storage before opening. Check the carton count and whether you can finish each opened carton within its stated refrigerated storage period.
Start with the role the drink will play in your snack or everyday meals, then compare cartons on the same per-100ml and per-serving basis. Treat pack format as a separate decision from nutrition.
| Priority | What to check | Your needs |
|---|---|---|
| Protein | Compare grams per 100ml and for your serving. Alpro UK and Sainsbury’s list 5.0g per 100ml for their reviewed high-protein drinks; Tesco and Waitrose list 3.5g and 3.4g for their reviewed unsweetened cartons. | After a session lasting more than an hour, I want the drink to contribute protein to a snack or meal. The British Heart Foundation advises considering protein alongside carbohydrate after longer exercise. |
| Sugars | Read sugars separately from protein, using the same per-100ml basis. Alpro UK lists 2.5g sugars for its reviewed high-protein drink; Sainsbury’s lists 2.9g. The reviewed Waitrose unsweetened carton lists 0g. | For an everyday drink, I may prefer an unsweetened carton. After longer exercise, I would consider the drink alongside the rest of my food rather than assume a high-protein label means no sugar. |
| Fortification | Check the current label for calcium, iodine, vitamin D and B12. GOV.UK notes that nutrient content varies considerably between plant-based drinks; Tesco and Waitrose list these nutrients on their reviewed unsweetened products. | If soya drink regularly replaces dairy milk in my meals, I want to know which added nutrients the carton actually lists. I would not treat an organic drink and a fortified drink as interchangeable. |
| Pack and storage | Confirm the number and size of cartons, unopened storage directions and instructions after opening. The reviewed Tesco, Waitrose and Plenish cartons state different refrigerated periods after opening: five, three and four days respectively. | For cupboard storage, I want a pack size I can use while following each opened carton’s directions. A long-life multipack does not remove the need to refrigerate a carton after opening. |
| Allergens | Read the allergen declaration on the specific product. The Food Standards Agency identifies soya as an allergen; ASDA’s reviewed Just Essentials carton also carries a precautionary nut statement. | If a soya or nut allergy affects my purchase, I need to check the relevant statements on the carton before choosing it. |
ASDA lists 2.0g protein per 100ml for its reviewed Just Essentials carton, while Alpro UK and Sainsbury’s list 5.0g for their reviewed high-protein drinks. Carton size alone does not show the protein in a serving.
Compare the nutrition panels per 100ml, then calculate what your usual serving contributes alongside the rest of your food.
The reviewed Alpro and Sainsbury’s high-protein drinks list 2.5g and 2.9g sugars per 100ml respectively. Protein and sugars are separate figures on the label.
Check both figures and consider what else you are eating, particularly after a longer session when the British Heart Foundation advises considering protein alongside carbohydrate.
GOV.UK notes that plant-based drinks vary in nutrient content. Waitrose lists added nutrients for its reviewed unsweetened carton, while the reviewed Plenish Organic Soya ingredient list contains spring water and organic soya beans.
If particular added nutrients matter to your choice, check the current carton’s ingredients and nutrition panel.
A long-life format concerns storage before opening. The reviewed Tesco, Waitrose and Plenish cartons give different periods for use after opening.
Follow each carton’s refrigeration and use instructions, and choose a multipack you expect to use within those conditions.
These examples show why it matters to compare individual cartons; a brand name alone does not establish protein content, sugars or fortification.
The reviewed range includes a High Protein Plain 1L drink and a No Sugars long-life 8 x 1L pack.
Tesco Unsweetened Soya Drink is a 1L carton with listed added nutrients.
The reviewed 1L choices include an unsweetened soya drink and a sweetened high-protein drink.
Just Essentials Unsweetened Soya Drink is a 1L carton to compare on its own label.
Marks & Spencer describes sweetened and unsweetened soya drinks enriched with calcium, iodine, vitamin D and B12.
Essential Unsweetened Soya Drink is a 1L long-life carton with listed added nutrients.
This Alpro Plant Protein listing is an option to consider when choosing a soya drink for a post-workout snack. Confirm the pack quantity separately if you are buying for bulk use.
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For a post-workout snack, compare the carton’s protein per serving with the rest of your food. The listing name specifies 1L and begins with “6”; confirm how many cartons are included if you need a multipack.
Consider the whole snack or meal. For exercise lasting more than an hour, the British Heart Foundation discusses 15–30g protein alongside carbohydrate; Sainsbury’s lists 12.5g protein in a 250ml serving of its reviewed High Protein soya drink, so the drink alone does not reach the lower end of that cited range.
No. The British Heart Foundation says that for exercise lasting less than an hour, regular meals containing protein across the day matter more than focusing on extra protein immediately afterwards. Choose a carton according to how it fits the food you otherwise eat.
No; check the particular carton. GOV.UK notes considerable variation between plant-based drinks, while the reviewed Tesco and Waitrose unsweetened cartons list calcium, iodine and selected vitamins. The reviewed Plenish Organic Soya ingredient list contains spring water and organic soya beans.
Avoid soya drinks if you have a soya allergy: the Food Standards Agency identifies soya as an allergen that can pose a risk to affected people. Read the specific carton’s allergen declaration, including any other precautionary statements relevant to you.
Follow the pack’s directions before opening, then refrigerate each carton after opening and use it within its stated period. The reviewed Tesco, Waitrose Essential and Plenish cartons specify five, three and four days after opening respectively; do not apply one carton’s period to another.