Quick answer
There is no permanent winner: buy the equivalent product with the lower delivered cost per gram of protein. Bulk is often the simpler choice for straightforward powders and large bags; THE PROTEIN WORKS can win when a promotion makes an equivalent whey or vegan blend cheaper. Check the live Bulk vs THE PROTEIN WORKS comparison. Match the protein format first, then compare protein density, calories and final price.
Bulk vs THE PROTEIN WORKS at a glance
Start with the exact product type. Brand-level claims are less useful than comparing two equivalent labels and their current delivered prices.
- 1
Standard whey: both use complete dairy protein with all nine essential amino acids.
- 2
Price: compare the final basket total per gram of protein, not RRP or discount percentage.
- 3
Isolate: compare isolate with isolate; its higher price may be justified by protein density or lactose tolerance.
- 4
Vegan protein: inspect the exact plant sources and amino-acid balance.
- 5
Flavour: try a smaller size before committing to several kilograms.
- 6
Delivery: include shipping thresholds and subscription conditions in a close comparison.
Live comparison
Bulk and Protein Works products
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 4000132 £25.99 28.0g479£0.812 24g383£0.65 15.96£0.027 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 5000137 £39.99 28.0g460£1.081 24g375£0.80 15.63£0.033 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 8480132 £82.49 50.4g1006£2.578 19g380£0.97 20.00£0.051 4240116 £46.99 50.4g1006£2.937 19g380£1.11 20.00£0.058 212018 £26.49 50.4g1006£3.311 19g380£1.25 20.00£0.066 132515 £19.99 53.0g992£3.998 20g374£1.51 18.70£0.075 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001133 £39.99 21.7g101£0.301 72.01g336.86£1.00 4.68£0.014 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 5000132 £54.99 43.0g572£1.718 28g369£1.10 13.18£0.039 2500116 £29.99 43.0g572£1.874 28g369£1.20 13.18£0.043 100016 £12.99 43.0g572£2.165 28g369£1.30 13.18£0.046 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001133 £44.99 24.3g114£0.338 80.86g381£1.12 4.71£0.014 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2500125 £29.99 31.0g369£1.200 31g369£1.20 11.90£0.039 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001167 £59.99 24.0g119£0.359 80g394£1.20 4.92£0.015 2500183 £31.49 24.0g119£0.379 80g394£1.26 4.92£0.016 1000133 £13.99 24.0g119£0.424 80g394£1.40 4.92£0.017 500117 £7.99 24.0g119£0.470 80g394£1.60 4.92£0.020 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001167 £59.99 25.0g107£0.359 84g357£1.20 4.25£0.014 2500183 £31.99 25.0g107£0.385 84g357£1.28 4.25£0.015 1000133 £13.99 25.0g107£0.424 84g357£1.40 4.25£0.017 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001132 £47.99 24.2g122£0.364 80g405£1.20 5.06£0.015 2000166 £25.19 24.2g122£0.382 80g405£1.26 5.06£0.016 1000133 £13.99 24.2g122£0.424 80g405£1.40 5.06£0.017 500116 £7.99 25.0g122£0.499 80g405£1.60 5.06£0.020 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001132 £47.99 26.4g113£0.364 87g375£1.20 4.31£0.014 2000166 £25.59 26.4g113£0.388 87g375£1.28 4.31£0.015 1000133 £13.99 26.4g113£0.424 87g375£1.40 4.31£0.016 500116 £9.99 27.2g113£0.624 87g375£2.00 4.31£0.023 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001133 £49.99 --£0.376 --£1.25 -- |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 8000140 £107.49 50.0g769£2.687 25g385£1.34 15.40£0.054 4000120 £59.99 50.0g769£3.000 25g385£1.50 15.40£0.060 2000110 £34.99 50.0g769£3.499 25g385£1.75 15.40£0.070 100015 £19.99 50.0g769£3.998 25g385£2.00 15.40£0.080 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2500183 £33.99 24.0g112£0.410 80g374£1.36 4.67£0.017 1000133 £14.99 24.0g112£0.454 80g374£1.50 4.67£0.019 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 5000159 £68.99 37.0g314£1.169 43g369£1.38 8.58£0.032 2500129 £37.99 37.0g314£1.310 43g369£1.52 8.58£0.035 1000112 £16.99 37.0g314£1.416 43g369£1.70 8.58£0.040 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001160 £55.49 21.0g91£0.347 84g364£1.39 4.33£0.017 2000180 £29.99 21.0g91£0.375 84g364£1.50 4.33£0.018 1000140 £16.79 21.0g91£0.420 84g364£1.68 4.33£0.020 500120 £8.89 21.0g91£0.445 84g364£1.78 4.33£0.021 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000120 £13.99 17.0g174£0.700 34g348£1.40 10.24£0.041 500110 £7.99 17.0g174£0.799 34g348£1.60 10.24£0.047 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001132 £56.09 26.1g108£0.425 86g360£1.40 4.19£0.016 2000166 £30.39 26.1g108£0.460 86g360£1.52 4.19£0.018 1000133 £16.99 26.1g108£0.515 86g360£1.70 4.19£0.020 500116 £8.69 26.9g108£0.543 86g360£1.74 4.19£0.020 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001143 £79.99 24.0g127£0.559 69g363£1.60 5.26£0.023 2500171 £42.99 24.0g127£0.605 69g363£1.72 5.26£0.025 1000129 £18.99 24.0g127£0.655 69g363£1.90 5.26£0.028 500114 £9.99 24.0g127£0.714 69g363£2.00 5.26£0.029 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001114 £67.79 28.4g124£0.595 81g355£1.69 4.38£0.021 2000157 £36.69 28.4g124£0.644 81g355£1.83 4.38£0.023 1000128 £20.19 28.9g124£0.721 81g355£2.02 4.38£0.025 500114 £10.59 28.9g124£0.756 81g355£2.12 4.38£0.026 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 48001160 £85.69 17.7g110£0.536 59g366£1.79 6.20£0.030 2400180 £44.79 17.7g110£0.560 59g366£1.87 6.20£0.032 1200140 £23.19 17.7g110£0.580 59g366£1.93 6.20£0.033 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000112 £17.99 20.8g271£1.499 25g338£1.80 13.52£0.072 50016 £9.99 20.8g271£1.665 25g338£2.00 13.52£0.080 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000125 £19.99 14.4g146£0.800 36g341£2.00 9.47£0.056 500112 £10.99 15.0g146£0.916 36g341£2.20 9.47£0.061 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2500142 £49.99 29.0g216£1.190 48g360£2.00 7.50£0.042 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000120 £21.99 28.0g180£1.099 56g359£2.20 6.41£0.039 500110 £12.99 28.0g180£1.299 56g359£2.60 6.41£0.046 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000133 £21.99 24.2g106£0.666 80g355£2.20 4.44£0.027 40001133 £104.79 24.1g106£0.788 80g355£2.62 4.44£0.033 2000166 £54.39 24.2g106£0.824 80g355£2.72 4.44£0.034 500116 £15.99 25.0g106£0.999 80g355£3.20 4.44£0.040 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001167 £114.99 27.0g122£0.689 90g407£2.30 4.52£0.026 2500183 £59.99 27.0g122£0.723 90g407£2.40 4.52£0.027 1000133 £26.99 27.0g122£0.818 90g407£2.70 4.52£0.030 500117 £13.99 27.0g122£0.823 90g407£2.80 4.52£0.031 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000116 £24.49 24.4g205£1.531 39g342£2.45 8.77£0.063 50018 £13.29 24.4g205£1.661 39g342£2.66 8.77£0.068 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001156 £129.99 23.0g121£0.833 71g378£2.60 5.32£0.037 2500178 £67.99 23.0g121£0.872 71g378£2.72 5.32£0.038 1000131 £27.99 23.0g121£0.903 71g378£2.80 5.32£0.039 500116 £15.99 23.0g121£0.999 71g378£3.20 5.32£0.045 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 48001160 £125.99 20.4g111£0.787 68g371£2.62 5.46£0.039 2400180 £65.89 20.4g111£0.824 68g371£2.75 5.46£0.040 1200140 £34.09 20.4g111£0.852 68g371£2.84 5.46£0.042 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2500183 £67.99 23.0g105£0.819 77g350£2.72 4.55£0.035 1000133 £29.99 23.0g105£0.909 77g350£3.00 4.55£0.039 500117 £15.99 23.0g105£0.941 77g350£3.20 4.55£0.042 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001167 £139.99 22.0g113£0.838 75g376£2.80 5.01£0.037 2500183 £74.99 22.0g113£0.903 75g376£3.00 5.01£0.040 1000133 £31.99 22.0g113£0.969 75g376£3.20 5.01£0.043 500117 £16.99 22.0g113£0.999 75g376£3.40 5.01£0.045 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 48001136 £134.99 24.4g127£0.993 69g362£2.81 5.25£0.041 2400168 £70.59 24.4g127£1.038 69g362£2.94 5.25£0.043 1200134 £36.59 24.4g127£1.076 69g362£3.05 5.25£0.044 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 500114 £15.99 30.0g128£1.142 86g365£3.20 4.24£0.037 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2500142 £79.99 44.0g224£1.905 73g374£3.20 5.12£0.044 1000117 £34.99 44.0g224£2.058 73g374£3.50 5.12£0.048 50018 £18.99 44.0g224£2.374 73g374£3.80 5.12£0.052 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001133 £139.69 22.3g113£1.050 74g377£3.49 5.09£0.047 2000166 £72.49 22.4g113£1.098 74g377£3.62 5.09£0.049 1000133 £37.59 22.4g113£1.139 74g377£3.76 5.09£0.051 500116 £21.49 23.1g113£1.343 74g377£4.30 5.09£0.058 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2000166 £69.99 20.6g109£1.060 68g362£3.50 5.32£0.051 1000133 £39.99 20.6g109£1.212 68g362£4.00 5.32£0.059 500116 £21.99 21.3g109£1.374 68g362£4.40 5.32£0.065 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2270176 £79.99 24.0g113£1.052 81g378£3.52 4.67£0.044 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2000166 £71.99 20.6g108£1.091 68g360£3.60 5.29£0.053 1000133 £39.99 20.6g108£1.212 68g360£4.00 5.29£0.059 500116 £21.99 21.3g108£1.374 68g360£4.40 5.29£0.065 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2500183 £91.99 23.0g110£1.108 77g367£3.68 4.77£0.048 1000133 £39.99 23.0g110£1.212 77g367£4.00 4.77£0.052 500117 £23.49 23.0g110£1.382 77g367£4.70 4.77£0.061 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001167 £184.99 24.0g108£1.108 81g360£3.70 4.44£0.046 2500183 £94.99 24.0g108£1.144 81g360£3.80 4.44£0.047 1000133 £41.99 24.0g108£1.272 81g360£4.20 4.44£0.052 500117 £23.99 24.0g108£1.411 81g360£4.80 4.44£0.059 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 50001167 £184.99 25.0g110£1.108 84g365£3.70 4.35£0.044 2500183 £94.99 25.0g110£1.144 84g365£3.80 4.35£0.045 1000133 £41.99 25.0g110£1.272 84g365£4.20 4.35£0.050 500117 £23.99 25.0g110£1.411 84g365£4.80 4.35£0.057 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000140 £37.99 17.0g90£0.950 69g360£3.80 5.22£0.055 500120 £19.99 17.0g90£0.999 69g360£4.00 5.22£0.058 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1800160 £69.99 20.1g112£1.166 67g373£3.89 5.57£0.058 1200140 £47.49 20.1g112£1.187 67g373£3.96 5.57£0.059 600120 £24.99 20.1g112£1.249 67g373£4.17 5.57£0.062 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000120 £38.99 29.0g186£1.950 59g372£3.90 6.31£0.066 500110 £22.49 29.0g186£2.249 59g372£4.50 6.31£0.076 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2100160 £84.99 25.0g131£1.416 70g374£4.05 5.34£0.058 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 540136 £23.39 9.9g47£0.650 66g314£4.33 4.76£0.066 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2000180 £94.99 20.0g86£1.187 80g343£4.75 4.29£0.059 1000140 £49.99 20.0g86£1.250 80g343£5.00 4.29£0.062 500120 £25.99 20.0g86£1.299 80g343£5.20 4.29£0.065 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 2500183 £119.99 26.0g112£1.446 85g374£4.80 4.40£0.056 1000133 £49.99 26.0g112£1.515 85g374£5.00 4.40£0.059 500117 £27.99 26.0g112£1.646 85g374£5.60 4.40£0.066 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 40001160 £216.99 21.5g91£1.356 86g365£5.42 4.24£0.063 2000180 £111.49 21.5g91£1.394 86g365£5.57 4.24£0.065 1000140 £61.59 21.5g91£1.540 86g365£6.16 4.24£0.072 500120 £35.19 21.5g91£1.759 86g365£7.04 4.24£0.082 |
FlavourSize (g)QtyServingsOfferTotal Per serving Per 100g Per 1g protein 1000140 £54.99 20.3g85£1.375 81g342£5.50 4.22£0.068 500120 £28.59 20.3g85£1.429 81g342£5.72 4.22£0.071 |
Which has better protein?
Equivalent whey products from both brands provide complete protein, so the label and formulation matter more than the logo. Compare protein per 100g and the calories required to obtain the same 20–25g protein serving.
For plant protein, look for complementary sources such as pea and rice rather than assuming every vegan powder has the same amino-acid profile. Added amino acids should be clearly distinguished from protein naturally supplied by the main ingredients.
Which is cheaper?
The answer changes with product, size and promotion. The live table normalises current listings so a smaller bag or lower-protein formulation cannot win solely through a cheaper headline price.
Sort by cost per gram of protein for whey and other protein powders. For creatine monohydrate or non-protein supplements, compare the relevant active dose and servings instead.
ProteinDeals verdict
Choose Bulk when its like-for-like powder is cheaper, you want an unflavoured staple or the larger pack reduces the delivered unit cost. Choose THE PROTEIN WORKS when its promotion wins after normalisation or its formulation and flavour are a better fit.
If the difference is small, prioritise the product you tolerate and will actually finish. Open the full whey comparison if a third brand may beat both.
Cheapest Mass Gainer
Vegan Protein 360 - BLACK Innovation
The Protein Works · 4kg
Pros
- High protein density at 84g per 100g
- Large pack reduces repeat ordering
Cons
- Nutrition can vary between flavours
- Check the final delivered price before buying
References
Sources and further reading
- 01Bulk — official UK website
Official product, ingredient and current offer information.
- 02THE PROTEIN WORKS — official website
Official product, ingredient and current offer information.
Frequently asked questions
Is Bulk or THE PROTEIN WORKS cheaper?+
It changes by product and promotion. Compare equivalent formats by delivered cost per gram of protein in the live table.
Which brand has better whey protein?+
Both sell complete whey proteins. Compare the exact protein source, protein per 100g, calories, ingredients, testing and price.
Which is better for vegan protein?+
Judge the exact blend and label. A complementary plant blend may provide a more balanced amino-acid profile than a single source.