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Soy protein

Also called protein, whey, whey protein and 13 more

casein, micellar casein, beef protein, egg protein, egg white protein, soy protein, pea protein, rice protein, hemp protein, vegan protein, plant protein, protein isolate, protein concentrate.

The best price per 25 g protein and per month across 1 UK retailer, and where to buy it cheapest. A unit for comparing, not advice.

Comparing protein powder

We count the protein a label states per serving, whatever the pack size or the serving size, so every product sits on one scale. Protein powder comes as whey concentrate, whey isolate, whey hydrolysate, whey blend, milk protein, casein, beef protein, egg white protein, soy protein, pea protein, rice protein and vegan protein blend, and each form has its own table, because someone buying one would not usually take another as a like-for-like substitute. Products that combine protein powder with other ingredients are listed separately, because their price buys more than protein. 25 g is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.

Prices last checked: 20 October 2026. Ranked purely by price per 25 g protein — a comparison unit, not a recommendation. We earn commission when you buy through these links; it never affects the order.

Protein powder, Soy protein: products ranked by price per 25 g protein
Rank	Product	Per 25 g protein	Per month	Lasts	Buy	How it is worked out
1	Cheapest per doseImpact Soy Protein - Brown Sugar Milk TeaMyvegan · · 5 kg · 166.7 servings · 24 g a servingDetails and price history Add to my stackBrown Sugar Milk Teaalso contains caffeine, caffeineclaimed: veganclaimed: vegetarian	42p	£12.65	5 months	£67.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 5000 ÷ 30 per serving = 166.7 In the pack: 166.7 × 24 g = 4,000 g £67.49 ÷ 4,000 g × 25 g = 42.2p per 25 g Amount per serving: stated on the label. Also contains: caffeine, caffeine. The price counts the protein powder only. What the retailer's listing says pack units “5kg” servings stated “Contains 166 servings” units per serving “Per 30g” amount per serving “Protein ; 79g ; 24g” Is this wrong? Tell us
2	Impact Soy Protein - Milk TeaMyvegan · · 5 kg · 166.7 servings · 24 g a servingDetails and price history Add to my stackMilk Teaclaimed: veganclaimed: vegetarian	42p	£12.65	5 months	£67.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 5000 ÷ 30 per serving = 166.7 In the pack: 166.7 × 24 g = 4,000 g £67.49 ÷ 4,000 g × 25 g = 42.2p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “5kg” servings stated “Contains 166 servings” units per serving “Per 30g” amount per serving “Protein ; 79g ; 24g” Is this wrong? Tell us
3	Impact Soy Protein - Milk Tea2.5 kg · 83.3 servings · 24 g a servingDetails and price history Add to my stackMilk Teaclaimed: veganclaimed: vegetarian	44p	£13.31	3 months	£35.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 2500 ÷ 30 per serving = 83.3 In the pack: 83.3 × 24 g = 2,000 g £35.49 ÷ 2,000 g × 25 g = 44.4p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “2.5kg” servings stated “Contains 83 servings” units per serving “Per 30g” amount per serving “Protein ; 79g ; 24g” Is this wrong? Tell us
4	Impact Soy Protein - Brown Sugar Milk Tea2.5 kg · 83.3 servings · 24 g a servingDetails and price history Add to my stackBrown Sugar Milk Teaalso contains caffeine, caffeineclaimed: veganclaimed: vegetarian	44p	£13.31	3 months	£35.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 2500 ÷ 30 per serving = 83.3 In the pack: 83.3 × 24 g = 2,000 g £35.49 ÷ 2,000 g × 25 g = 44.4p per 25 g Amount per serving: stated on the label. Also contains: caffeine, caffeine. The price counts the protein powder only. What the retailer's listing says pack units “2.5kg” servings stated “Contains 83 servings” units per serving “Per 30g” amount per serving “Protein ; 79g ; 24g” Is this wrong? Tell us
5	Impact Soy Protein 2.5kg Chocolate Smooth2.5 kg · 83.3 servings · 23 g a servingDetails and price history Add to my stackChocolate Smooth	46p	£13.89	3 months	£35.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 2500 ÷ 30 per serving = 83.3 In the pack: 83.3 × 23 g = 1,916.7 g £35.49 ÷ 1,916.7 g × 25 g = 46.3p per 25 g Amount per serving: stated on the label. What the retailer's listing says flavour “Chocolate Smooth” pack units “2.5kg” units per serving “Per 100g ; Per 30g” amount per serving “Protein ; 77g ; 23g” form raw “Soy Protein” Is this wrong? Tell us
6	Impact Soy Protein - Natural Chocolate2.7 kg · 90 servings · 23 g a servingDetails and price history Add to my stackNatural Chocolateclaimed: veganclaimed: vegetarian	50p	£15.03	3 months	£41.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 2700 ÷ 30 per serving = 90 In the pack: 90 × 23 g = 2,070 g £41.49 ÷ 2,070 g × 25 g = 50.1p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “2700g” servings stated “Contains 90 servings” units per serving “Per 30g” amount per serving “Protein ; 76g ; 23g” Is this wrong? Tell us
7	Impact Soy Protein - Salted Caramel2.7 kg · 90 servings · 23 g a servingDetails and price history Add to my stackSalted Caramelclaimed: veganclaimed: vegetarian	50p	£15.03	3 months	£41.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 2700 ÷ 30 per serving = 90 In the pack: 90 × 23 g = 2,070 g £41.49 ÷ 2,070 g × 25 g = 50.1p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “2700g” servings stated “Contains 90 servings” units per serving “Per 30g” amount per serving “Protein ; 76g ; 23g” Is this wrong? Tell us
8	Impact Soy Protein - Natural Chocolate900 g · 30 servings · 23 g a servingDetails and price history Add to my stackNatural Chocolateclaimed: veganclaimed: vegetarian	54p	£16.29	28 days	£14.99View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 900 ÷ 30 per serving = 30 In the pack: 30 × 23 g = 690 g £14.99 ÷ 690 g × 25 g = 54.3p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “900g” servings stated “Contains 30 servings” units per serving “Per 30g” amount per serving “Protein ; 76g ; 23g” Is this wrong? Tell us
9	Impact Soy Protein - Salted Caramel900 g · 30 servings · 23 g a servingDetails and price history Add to my stackSalted Caramelclaimed: veganclaimed: vegetarian	54p	£16.29	28 days	£14.99View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 900 ÷ 30 per serving = 30 In the pack: 30 × 23 g = 690 g £14.99 ÷ 690 g × 25 g = 54.3p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “900g” servings stated “Contains 30 servings” units per serving “Per 30g” amount per serving “Protein ; 76g ; 23g” Is this wrong? Tell us
10	Impact Soy Protein - Natural Strawberry500 g · 16.7 servings · 23 g a servingDetails and price history Add to my stackNatural Strawberryclaimed: veganclaimed: vegetarian	55p	£16.61	15 days	£8.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 500 ÷ 30 per serving = 16.7 In the pack: 16.7 × 23 g = 383.3 g £8.49 ÷ 383.3 g × 25 g = 55.4p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “500g” servings stated “Contains 16 servings” units per serving “Per 30g” amount per serving “Protein ; 75g ; 23g” Is this wrong? Tell us
11	Impact Soy Protein - Vanilla450 g · 15 servings · 23 g a servingDetails and price history Add to my stackVanillaclaimed: veganclaimed: vegetarian	65p	£19.54	14 days	£8.99View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 450 ÷ 30 per serving = 15 In the pack: 15 × 23 g = 345 g £8.99 ÷ 345 g × 25 g = 65.1p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “450g” servings stated “Contains 15 servings” units per serving “Per 30g” amount per serving “Protein ; 77g ; 23g” Is this wrong? Tell us
12	Impact Soy Protein 1kg Chocolate Smooth1 kg · 33.3 servings · 23 g a servingDetails and price history Add to my stackChocolate SmoothOut of stock	49p	£14.66	31 days	£14.99View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 1000 ÷ 30 per serving = 33.3 In the pack: 33.3 × 23 g = 766.7 g £14.99 ÷ 766.7 g × 25 g = 48.9p per 25 g Amount per serving: stated on the label. What the retailer's listing says flavour “Chocolate Smooth” pack units “1kg” units per serving “Per 100g ; Per 30g” amount per serving “Protein ; 77g ; 23g” form raw “Soy Protein” Is this wrong? Tell us
13	Impact Soy Protein - Vanilla2.7 kg · 90 servings · 23 g a servingDetails and price history Add to my stackVanillaclaimed: veganclaimed: vegetarianOut of stock	50p	£15.03	3 months	£41.49View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 2700 ÷ 30 per serving = 90 In the pack: 90 × 23 g = 2,070 g £41.49 ÷ 2,070 g × 25 g = 50.1p per 25 g Amount per serving: stated on the label. What the retailer's listing says pack units “2700g” servings stated “Contains 90 servings” units per serving “Per 30g” amount per serving “Protein ; 77g ; 23g” Is this wrong? Tell us
14	Impact Soy Protein 500g Unflavoured500 g · 16.7 servings · 23 g a servingDetails and price history Add to my stackUnflavouredOut of stock	59p	£17.59	15 days	£8.99View at Myprotein (opens in a new tab)Free delivery over £55.00, otherwise £4.49 AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.	Show the working Servings: 500 ÷ 30 per serving = 16.7 In the pack: 16.7 × 23 g = 383.3 g £8.99 ÷ 383.3 g × 25 g = 58.6p per 25 g Amount per serving: stated on the label. What the retailer's listing says flavour “Unflavoured” pack units “500g” units per serving “Per 100g ; Per 30g” amount per serving “Protein ; 77g ; 23g” form raw “Soy Protein” Is this wrong? Tell us