Quick answer
Our pick for most people is MyProtein Impact Whey. When it costs within roughly 10% of Bulk Pure Whey per gram of protein, its wider flavour choice and the stronger hands-on feedback on taste make it the better bag to live with. We would buy Bulk instead only when its live cost per 1g protein is at least 10% lower, or when buying unflavoured whey for smoothies and cooking. That is deliberately more decisive than saying both are good. Bulk often wins the spreadsheet; MyProtein more often wins the shake. The live price table decides whether MyProtein's usability advantage is worth paying for today.
Price per 100g
On a like-for-like basis, compare the same protein format and a similar bag size. The live table below pulls current MyProtein and Bulk listings, so it is more useful than treating one promotional snapshot as a permanent winner.
The official MyProtein Impact Whey page and official Bulk Pure Whey page both change price across sales, flavours and pack sizes. Compare the checkout price, not merely the percentage shown beside it.
Live comparison
Myprotein and Bulk products
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 40001 £24.99 3228.0g479£0.781 22.4g383£0.62 17.10£0.028 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £39.99 3728.0g460£1.081 22g375£0.80 17.05£0.036 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £54.99 3243.0g572£1.718 28g369£1.10 13.18£0.039 25001 £29.99 1643.0g572£1.874 28g369£1.20 13.18£0.043 10001 £12.99 643.0g572£2.165 28g369£1.30 13.18£0.046 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 40001 £44.99 13324.3g114£0.338 80.86g381£1.12 4.71£0.014 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £29.99 2531.0g369£1.200 31g369£1.20 11.90£0.039 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £59.99 16724.0g119£0.359 80g394£1.20 4.92£0.015 25001 £31.49 8324.0g119£0.379 80g394£1.26 4.92£0.016 10001 £13.99 3324.0g119£0.424 80g394£1.40 4.92£0.017 5001 £7.99 1724.0g119£0.470 80g394£1.60 4.92£0.020 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £59.99 16725.0g107£0.359 84g357£1.20 4.25£0.014 25001 £31.99 8325.0g107£0.385 84g357£1.28 4.25£0.015 10001 £13.99 3325.0g107£0.424 84g357£1.40 4.25£0.017 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 40001 £49.99 133--£0.376 --£1.25 -- |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £33.99 8324.0g112£0.410 80g374£1.36 4.67£0.017 10001 £14.99 3324.0g112£0.454 80g374£1.50 4.67£0.019 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £68.99 5937.0g314£1.169 43g369£1.38 8.58£0.032 25001 £37.99 2937.0g314£1.310 43g369£1.52 8.58£0.035 10001 £16.99 1237.0g314£1.416 43g369£1.70 8.58£0.040 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £79.99 14324.0g127£0.559 69g363£1.60 5.26£0.023 25001 £42.99 7124.0g127£0.605 69g363£1.72 5.26£0.025 10001 £18.99 2924.0g127£0.655 69g363£1.90 5.26£0.028 5001 £9.99 1424.0g127£0.714 69g363£2.00 5.26£0.029 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 40001 £66.49 --115- --£1.66 -- 45001 £154.49 15021.0g112£1.030 69g372£3.43 5.39£0.050 50001 £157.49 16621.0g112£0.949 69g372£3.15 5.39£0.046 43501 £139.99 15020.0g107£0.933 70g370£3.22 5.29£0.046 27001 £97.49 9021.0g112£1.083 69g372£3.61 5.39£0.052 25001 £82.99 8321.0g112£1.000 69g372£3.32 5.39£0.048 37501 £124.49 15020.0g95£0.830 80g380£3.32 4.75£0.041 26101 £87.49 9020.0g107£0.972 70g370£3.35 5.29£0.048 9301 £31.49 3023.0g115£1.050 74g370£3.39 5.00£0.046 22501 £77.49 9020.0g95£0.861 79g379£3.44 4.80£0.044 36001 £124.49 15020.0g93£0.830 84g387£3.46 4.61£0.041 19201 £66.49 6022.0g114£1.108 72g379£3.46 5.26£0.048 9001 £34.99 3021.0g112£1.166 69g372£3.89 5.39£0.056 10001 £34.99 4018.0g98£0.875 72g390£3.50 5.42£0.049 21601 £77.49 9020.0g93£0.861 84g387£3.59 4.61£0.043 34501 £124.49 15020.0g89£0.830 87g388£3.61 4.46£0.041 8701 £31.49 3020.0g107£1.050 70g370£3.62 5.29£0.052 9601 £40.49 3020.0g113£1.350 62g353£4.22 5.69£0.068 18001 £66.49 6021.0g112£1.108 69g372£3.69 5.39£0.054 7501 £27.99 3020.0g95£0.933 80g380£3.73 4.75£0.047 20701 £77.49 9020.0g89£0.861 86g388£3.74 4.51£0.044 20001 £76.99 6620.0g119£1.167 62g373£3.85 6.02£0.062 25201 £97.49 9020.0g105£1.083 72g375£3.87 5.21£0.054 7201 £27.99 3020.0g93£0.933 84g387£3.89 4.61£0.046 24301 £97.49 9020.0g102£1.083 74g378£4.01 5.11£0.054 6901 £27.99 3020.0g89£0.933 87g388£4.06 4.46£0.047 6001 £24.99 2020.0g112£1.249 67g373£4.17 5.57£0.062 8401 £34.99 3020.0g105£1.166 72g375£4.17 5.21£0.058 4651 £19.99 1522.0g114£1.333 72g379£4.30 5.26£0.060 8101 £34.99 3020.0g102£1.166 74g378£4.32 5.11£0.058 4501 £20.99 1521.0g112£1.399 69g372£4.66 5.39£0.068 3751 £16.99 1520.0g95£1.133 80g380£4.53 4.75£0.057 4351 £19.99 1520.0g107£1.333 70g370£4.60 5.29£0.066 3601 £16.99 1520.0g93£1.133 84g387£4.72 4.61£0.056 5001 £24.49 1520.0g120£1.633 63g375£4.90 5.95£0.078 3451 £16.99 1520.0g89£1.133 87g388£4.92 4.46£0.057 4801 £24.49 1520.0g113£1.633 62g353£5.10 5.69£0.082 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 27401 £45.99 1050.0g1000£4.599 18g364£1.68 20.22£0.093 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £98.49 5029.0g383£1.970 29g383£1.97 13.21£0.068 25001 £51.99 2529.0g378£2.080 29g378£2.08 13.03£0.072 10001 £20.99 1029.0g383£2.099 29g383£2.10 13.21£0.072 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £49.99 4229.0g216£1.190 48g360£2.00 7.50£0.042 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £108.99 20020.0g80£0.545 100g400£2.18 4.00£0.022 25001 £56.99 10026.0g107£0.570 88g358£2.28 4.07£0.026 31501 £105.99 15020.0g84£0.707 96g400£3.36 4.17£0.035 30001 £105.99 15020.0g80£0.707 100g400£3.53 4.00£0.035 18901 £66.99 9020.0g84£0.744 96g400£3.54 4.17£0.037 18001 £66.99 9020.0g80£0.744 100g400£3.72 4.00£0.037 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £56.99 8322.0g122£0.687 69g383£2.28 5.55£0.033 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £114.99 16727.0g122£0.689 90g407£2.30 4.52£0.026 25001 £59.99 8327.0g122£0.723 90g407£2.40 4.52£0.027 10001 £26.99 3327.0g122£0.818 90g407£2.70 4.52£0.030 5001 £13.99 1727.0g122£0.823 90g407£2.80 4.52£0.031 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £57.99 2033.0g451£2.900 27g361£2.32 13.37£0.086 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £123.49 16723.0g102£0.739 76g341£2.47 4.49£0.032 25001 £64.99 8323.0g105£0.783 77g350£2.60 4.55£0.034 10001 £27.99 3323.0g105£0.848 77g350£2.80 4.55£0.036 5001 £15.99 1623.0g105£0.999 75g349£3.20 4.65£0.043 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £63.49 10018.0g110£0.635 72g441£2.54 6.13£0.035 10001 £25.99 5218.0g110£0.500 72g441£2.60 6.13£0.036 6001 £17.49 2417.0g109£0.729 70g437£2.92 6.24£0.042 22501 £74.49 9017.0g109£0.828 68g436£3.31 6.41£0.049 7501 £25.99 3016.0g106£0.866 65g425£3.47 6.54£0.053 3751 £15.49 1516.0g106£1.033 65g425£4.13 6.54£0.064 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £63.49 7021.0g137£0.907 60g392£2.54 6.53£0.042 10001 £25.99 2820.0g138£0.928 58g395£2.60 6.81£0.045 5001 £15.49 1421.0g137£1.106 60g392£3.10 6.53£0.052 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £127.99 16721.0g108£0.766 71g360£2.56 5.07£0.036 25001 £68.49 8121.0g108£0.846 71g360£2.74 5.07£0.039 10001 £28.99 3321.0g108£0.878 71g360£2.90 5.07£0.041 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £129.99 15623.0g121£0.833 71g378£2.60 5.32£0.037 25001 £67.99 7823.0g121£0.872 71g378£2.72 5.32£0.038 10001 £27.99 3123.0g121£0.903 71g378£2.80 5.32£0.039 5001 £15.99 1623.0g121£0.999 71g378£3.20 5.32£0.045 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 20401 £53.99 1537.0g489£3.599 27g360£2.65 13.33£0.098 19951 £53.99 1536.0g471£3.599 27g354£2.71 13.11£0.100 19801 £53.99 1537.0g483£3.599 28g366£2.73 13.07£0.097 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £67.99 8323.0g105£0.819 77g350£2.72 4.55£0.035 10001 £29.99 3323.0g105£0.909 77g350£3.00 4.55£0.039 5001 £15.99 1723.0g105£0.941 77g350£3.20 4.55£0.042 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £139.99 16722.0g113£0.838 75g376£2.80 5.01£0.037 25001 £74.99 8322.0g113£0.903 75g376£3.00 5.01£0.040 10001 £31.99 3322.0g113£0.969 75g376£3.20 5.01£0.043 5001 £16.99 1722.0g113£0.999 75g376£3.40 5.01£0.045 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 10001 £30.49 1735.0g214£1.794 59g357£3.05 6.05£0.052 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 45001 £139.99 15020.0g105£0.933 69g362£3.11 5.25£0.045 43501 £139.99 15020.0g107£0.933 70g370£3.22 5.29£0.046 27001 £87.49 9020.0g105£0.972 69g362£3.24 5.25£0.047 26101 £87.49 9020.0g107£0.972 70g370£3.35 5.29£0.048 9301 £31.49 3023.0g115£1.050 74g370£3.39 5.00£0.046 9001 £31.49 3020.0g105£1.050 69g362£3.50 5.25£0.051 8701 £31.49 3020.0g107£1.050 70g370£3.62 5.29£0.052 4651 £19.99 1523.0g115£1.333 74g370£4.30 5.00£0.058 4501 £19.99 1520.0g105£1.333 69g362£4.44 5.25£0.064 4351 £19.99 1520.0g107£1.333 70g370£4.60 5.29£0.066 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £79.99 4244.0g224£1.905 73g374£3.20 5.12£0.044 10001 £34.99 1744.0g224£2.058 73g374£3.50 5.12£0.048 5001 £18.99 844.0g224£2.374 73g374£3.80 5.12£0.052 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 37501 £124.49 15020.0g95£0.830 80g380£3.32 4.75£0.041 22501 £77.49 9020.0g96£0.861 79g386£3.44 4.89£0.044 36001 £124.49 15020.0g93£0.830 84g387£3.46 4.61£0.041 21601 £77.49 9020.0g93£0.861 84g387£3.59 4.61£0.043 34501 £124.49 15020.0g89£0.830 87g388£3.61 4.46£0.041 7501 £27.99 3020.0g95£0.933 80g380£3.73 4.75£0.047 20701 £77.49 9020.0g96£0.861 79g386£3.74 4.89£0.047 7201 £27.99 3020.0g93£0.933 84g387£3.89 4.61£0.046 6901 £27.99 3020.0g89£0.933 87g388£4.06 4.46£0.047 3751 £16.99 1520.0g95£1.133 80g380£4.53 4.75£0.057 3601 £16.99 1520.0g96£1.133 79g386£4.72 4.89£0.060 3451 £16.99 1520.0g89£1.133 87g388£4.92 4.46£0.057 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 22701 £79.99 7624.0g113£1.052 81g378£3.52 4.67£0.044 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 5006 £17.99 620.0g81£2.998 4g-£3.55 -£0.888 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 10001 £36.49 4021.0g111£0.912 70g371£3.65 5.30£0.052 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £91.99 8323.0g110£1.108 77g367£3.68 4.77£0.048 10001 £39.99 3323.0g110£1.212 77g367£4.00 4.77£0.052 5001 £23.49 1723.0g110£1.382 77g367£4.70 4.77£0.061 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £184.99 16724.0g108£1.108 81g360£3.70 4.44£0.046 25001 £94.99 8324.0g108£1.144 81g360£3.80 4.44£0.047 10001 £41.99 3324.0g108£1.272 81g360£4.20 4.44£0.052 5001 £23.99 1724.0g108£1.411 81g360£4.80 4.44£0.059 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £184.99 16725.0g110£1.108 84g365£3.70 4.35£0.044 25001 £94.99 8325.0g110£1.144 84g365£3.80 4.35£0.045 10001 £41.99 3325.0g110£1.272 84g365£4.20 4.35£0.050 5001 £23.99 1725.0g110£1.411 84g365£4.80 4.35£0.057 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £186.49 16725.0g105£1.117 82g350£3.73 4.27£0.045 25001 £98.49 8324.7g108£1.187 82g358£3.94 4.37£0.048 10001 £40.99 3324.0g108£1.242 80g359£4.10 4.49£0.051 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 10001 £37.99 4017.0g90£0.950 69g360£3.80 5.22£0.055 5001 £19.99 2017.0g90£0.999 69g360£4.00 5.22£0.058 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 6301 £23.99 3018.0g74£0.800 86g350£3.81 4.07£0.044 6001 £23.99 3018.0g72£0.800 90g360£4.00 4.00£0.044 20001 £82.49 8021.0g89£1.031 85g355£4.12 4.18£0.049 10001 £45.49 4021.0g90£1.137 86g361£4.55 4.20£0.053 5001 £24.99 2020.0g88£1.249 80g350£5.00 4.38£0.062 2501 £17.99 1020.0g84£1.799 79g334£7.20 4.23£0.091 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 11801 £45.49 2530.0g153£1.820 63g325£3.86 5.16£0.061 11251 £45.49 2530.0g147£1.820 66g326£4.04 4.94£0.061 12001 £51.99 2530.0g152£2.080 62g317£4.33 5.11£0.070 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 10001 £38.99 2029.0g186£1.950 59g372£3.90 6.31£0.066 5001 £22.49 1029.0g186£2.249 59g372£4.50 6.31£0.076 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 21001 £83.49 6025.0g128£1.391 72g366£3.98 5.08£0.055 19801 £83.49 6025.0g123£1.391 75g374£4.22 4.99£0.056 9901 £44.99 3025.0g123£1.500 75g374£4.54 4.99£0.061 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 21001 £84.99 6025.0g131£1.416 70g374£4.05 5.34£0.058 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 50001 £208.49 3324.0g116£6.318 81g388£4.17 4.79£0.051 25001 £108.99 8324.0g116£1.313 81g388£4.36 4.79£0.054 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 6401 £27.49 2020.0g117£1.374 63g367£4.30 5.83£0.068 6201 £27.49 2020.0g115£1.374 63g370£4.43 5.87£0.070 6001 £27.49 2020.0g111£1.374 65g371£4.58 5.71£0.070 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 12001 £51.99 2530.0g152£2.080 62g317£4.33 5.11£0.070 11751 £51.99 2530.0g150£2.080 64g320£4.42 5.00£0.069 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 28801 £125.49 9022.0g112£1.394 69g349£4.36 5.06£0.063 27901 £125.49 9022.0g108£1.394 71g350£4.50 4.93£0.063 9901 £44.99 3026.0g118£1.500 80g359£4.54 4.49£0.057 27001 £125.49 9022.0g107£1.394 74g356£4.65 4.81£0.063 9601 £44.99 3022.0g112£1.500 69g349£4.69 5.06£0.068 9301 £44.99 3022.0g108£1.500 71g350£4.84 4.93£0.068 9001 £44.99 3022.0g107£1.500 74g356£5.00 4.81£0.068 4801 £26.99 1522.0g112£1.799 69g349£5.62 5.06£0.081 4651 £26.99 1522.0g108£1.799 71g350£5.80 4.93£0.082 4501 £26.99 1522.0g107£1.799 74g356£6.00 4.81£0.081 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 28801 £125.49 9022.0g112£1.394 69g349£4.36 5.06£0.063 25201 £110.99 9022.0g101£1.233 80g361£4.40 4.51£0.055 27901 £125.49 9022.0g108£1.394 71g350£4.50 4.93£0.063 50001 £225.99 16625.0g108£1.361 82g361£4.52 4.40£0.055 9901 £44.99 3026.0g118£1.500 80g359£4.54 4.49£0.057 27001 £139.49 9023.0g106£1.550 76g352£5.17 4.63£0.068 9601 £44.99 3022.0g112£1.500 69g349£4.69 5.06£0.068 23401 £110.99 9022.0g94£1.233 84g360£4.74 4.29£0.056 25001 £118.99 8323.0g109£1.434 75g362£4.76 4.83£0.063 9301 £44.99 3022.0g108£1.500 71g350£4.84 4.93£0.068 45001 £219.99 15023.0g106£1.467 76g352£4.89 4.63£0.064 9001 £49.99 3026.0g109£1.666 86g362£5.55 4.21£0.065 10001 £49.99 3324.0g108£1.515 80g361£5.00 4.51£0.062 42001 £219.99 15022.0g100£1.467 79g356£5.24 4.51£0.066 40501 £219.99 15022.0g97£1.467 81g357£5.43 4.41£0.067 4801 £26.99 1522.0g112£1.799 69g349£5.62 5.06£0.081 39001 £219.99 15022.0g94£1.467 84g361£5.64 4.30£0.067 5251 £29.99 1523.0g122£1.999 66g348£5.71 5.27£0.087 24301 £139.49 9022.0g97£1.550 82g361£5.74 4.40£0.070 4651 £26.99 1522.0g108£1.799 71g350£5.80 4.93£0.082 4501 £29.99 1523.0g106£1.999 76g352£6.66 4.63£0.088 5001 £29.99 1624.0g108£1.874 80g361£6.00 4.51£0.075 7801 £49.99 3026.0g109£1.666 86g362£6.41 4.21£0.075 3901 £29.99 1522.0g94£1.999 84g361£7.69 4.30£0.092 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 10201 £44.99 3025.0g128£1.500 72g366£4.41 5.08£0.061 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 10001 £45.49 4021.0g90£1.137 86g361£4.55 4.20£0.053 5001 £29.99 2020.0g86£1.499 78g331£6.00 4.24£0.077 9101 £49.99 3520.0g85£1.428 78g341£5.49 4.37£0.070 8891 £49.99 3520.0g84£1.428 79g336£5.62 4.25£0.071 8751 £49.99 3520.0g87£1.428 80g348£5.71 4.35£0.071 9141 £52.49 3520.0g89£1.500 77g342£5.74 4.44£0.075 5201 £34.49 2020.0g88£1.725 78g340£6.63 4.36£0.085 4051 £23.49 1520.0g85£1.566 78g341£5.80 4.37£0.074 3901 £23.49 1520.0g85£1.566 78g341£6.02 4.37£0.077 2501 £17.99 1020.0g84£1.799 79g334£7.20 4.23£0.091 251 £1.99 120.0g89£1.990 81g354£7.96 4.37£0.098 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 20001 £94.99 8020.0g86£1.187 80g343£4.75 4.29£0.059 10001 £49.99 4020.0g86£1.250 80g343£5.00 4.29£0.062 5001 £25.99 2020.0g86£1.299 80g343£5.20 4.29£0.065 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 25001 £119.99 8326.0g112£1.446 85g374£4.80 4.40£0.056 10001 £49.99 3326.0g112£1.515 85g374£5.00 4.40£0.059 5001 £27.99 1726.0g112£1.646 85g374£5.60 4.40£0.066 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 10001 £51.99 3324.0g109£1.575 79g362£5.20 4.58£0.066 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 6001 £32.49 2020.0g112£1.625 66g375£5.42 5.68£0.082 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 689.61 £39.49 1620.0g142£2.468 46g329£5.73 7.15£0.124 6881 £44.99 1620.0g141£2.812 45g327£6.54 7.27£0.145 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 4861 £27.99 2018.0g87£1.399 70g345£5.76 4.93£0.082 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 3901 £23.49 1520.0g89£1.566 75g331£6.02 4.41£0.080 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 4801 £34.99 2018.0g89£1.750 75g369£7.29 4.92£0.097 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 1681 £12.49 621.0g105£2.082 74g376£7.43 5.08£0.100 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 3201 £23.99 2011.0g50£1.200 70g310£7.50 4.43£0.107 3001 £23.99 2011.0g45£1.200 70g303£8.00 4.33£0.114 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 6401 £52.99 4010.0g61£1.325 63g380£8.28 6.03£0.131 3201 £28.49 2010.0g61£1.424 63g380£8.90 6.03£0.141 161 £1.99 111.0g55£1.990 67g344£12.44 5.13£0.186 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 2001 £32.00 252.8g29£1.280 2.8g362.5£16.00 129.46£5.714 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 1801 £49.99 301.3g-£1.666 21g-£27.77 -£1.322 |
FlavourSize (g)Size (ml)QtyTotal Per serving servings Per 100g Per 1g protein 601 £49.99 300.0g3£1.666 0g153£83.32 -- |
Protein content
Neither brand deserves a quality win simply for printing a larger scoop. What matters is the protein concentration of the exact flavour and what that protein costs. MyProtein's standard Impact Whey is the product we would use as the benchmark; Bulk Pure Whey must undercut it enough to compensate for generally less convincing flavour feedback.
Use the protein cost per 1g guide on the exact label. A bag that is £3 cheaper but supplies noticeably less protein can be false economy, while a tiny protein-density advantage is not worth a large premium. The embedded table resolves both variables together.
Flavours
MyProtein wins this round. Its catalogue gives you more chances to find a flavour you will actually finish, but range alone is not the reason for our verdict. Chocolate Smooth has repeated positive comments in MyProtein's customer reviews, while the independent Bulk test cited below found Strawberry the best of the three Bulk flavours tried but described the range as thinner and grainier overall.
Our practical ranking is MyProtein Chocolate Smooth first, Bulk Strawberry second, then unflavoured from whichever brand is cheaper. We would not buy a 2.5kg bag of an adventurous dessert flavour without testing a smaller pouch first. Saving pennies per shake is irrelevant if the final kilo sits untouched in a cupboard.
Community perspective
What others are saying
Watch what buyers found
Hands-on opinions
These creators provide hands-on opinions on taste, texture and mixability. ProteinDeals does not control their conclusions; use the live table for current prices.
I Compared MyProtein's Impact Whey to Every Top Selling Protein in the UK
Tom Newsham Fitness
A broader UK comparison that places Impact Whey alongside competing mainstream protein powders.
Bulk Pure Whey Protein Review
Joe Johnson
A product-specific look at Bulk Pure Whey, useful for the practical details that nutrition tables cannot show.
Anecdotes are useful for spotting recurring taste, texture and convenience issues, but they are not evidence of effectiveness.
Discount codes
Bulk has the less irritating shopping experience. MyProtein's constant codes and inflated-looking reference prices make it harder to know whether today's offer is genuinely strong. Bulk still uses promotions, but its final price is usually easier to judge without feeling that you missed a creator code hidden elsewhere.
ProteinDeals tracks active codes for both brands. Check the live protein comparison to see the effective listed value rather than relying on an old article price. The Competition and Markets Authority's guidance also explains why shoppers should treat reference prices, countdowns and urgency claims carefully.
Cheapest Mass Gainer
The Bulk Protein Company Vegan Gainz
Bodybuilding Warehouse · 4kg
What we would actually buy
Best overall: MyProtein Impact Whey Chocolate Smooth. This is the one we would recommend when the two brands are closely priced. It combines a proven mainstream flavour, a vast review base and enough pack-size choice to avoid gambling on a huge first order.
Best strict-budget buy: Bulk Pure Whey Strawberry. Choose it when the live cost per 1g protein is at least 10% below the comparable MyProtein bag. The hands-on Bulk review preferred Strawberry to Chocolate and Vanilla, although it still judged the powder thinner and grainier than MyProtein.
For the lowest-risk first order: buy 500g or 1kg before committing to 2.5kg or 5kg. A large bag only saves money if you can tolerate the sweetness, texture and flavour for dozens of shakes. Once you know the flavour works for you, move up to the pack size that gives the best live cost per gram.
For smoothies, porridge or baking: choose unflavoured whey if it is cheaper. Bulk states that its unflavoured powders are generally cheaper and contain more protein than flavoured equivalents. The trade-off is a more obvious dairy taste when mixed only with water.
For lactose sensitivity: neither standard concentrate should be the automatic choice. Compare whey isolate against concentrate and buy based on tolerance first, then price. Paying less for a bag that repeatedly upsets your stomach is poor value.
For shoppers who dislike code hunting: favour the product with the lower final price today, even if its advertised discount is smaller. Do not wait several weeks to save a trivial amount if you have already run out; do wait if the current cost per gram is far above the recent alternatives shown in the table.
Which should you buy?
Buy MyProtein Impact Whey if you drink whey with water, care about flavour, or are ordering your first large bag. Buy Bulk Pure Whey if its cost per gram of protein is meaningfully lower, you mostly blend powder with other ingredients, or you want an unflavoured workhorse.
That makes MyProtein our overall winner and Bulk our price-dependent winner. Use the embedded table for today's head-to-head, or open the full whey comparison to see whether a third brand beats both.
If neither brand leads on current value, do not force the choice. Check the cheapest protein per gram UK, MyProtein alternatives and cheapest way to buy protein powder before ordering.
References
Sources and further reading
- 01MyProtein — Impact Whey Protein Powder
Official product information, available sizes, flavours and current retailer pricing.
- 02Bulk — Pure Whey Protein
Official product information, available sizes, flavours, delivery and current retailer pricing.
- 03Competition and Markets Authority — urgency and price-reduction claims
UK guidance explaining transparent use of reference prices, discounts and urgency claims online.
- 04MyProtein — verified customer reviews for Impact Whey
Customer flavour and mixability reports; useful as anecdotal buying evidence rather than controlled product testing.
- 05Katabolic — hands-on Bulk Pure Whey review
Independent review reporting first-hand observations across Chocolate, Strawberry and Vanilla.