Myprotein Impact Whey vs Bulk Pure Whey Protein
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If you’re a US buyer, choose Myprotein — Bulk doesn’t ship to the United States. For UK buyers, the two are closely matched: both are Informed Sport certified whey concentrates at near-identical per-serving prices. Myprotein wins on flavour range (50+ vs 30+); Bulk wins on ingredient transparency. The honest answer is most UK buyers won’t notice the difference between them once they’re past the brand choice.
Myprotein Impact Whey
21–23g protein per serving. Whey concentrate. Informed Sport certified. 50+ flavours — the widest catalogue in the certified category. Ships to the US.
Check current price on Amazon →Bulk Pure Whey
21–23g protein per serving. Whey concentrate. Informed Sport certified. Transparent ingredient labelling. UK/EU only — no US shipping.
Check price on Bulk.com →At a glance
- Both are whey concentrate at 21–23g protein per scoop, both Informed Sport certified
- Myprotein ships to the US from domestic fulfilment; Bulk ships UK and select EU only
- Myprotein has 50+ flavours; Bulk has roughly 30+
- Bulk publishes more transparent ingredient information per product
- Both run frequent sales — actual per-serving cost depends heavily on which is on sale when you buy
Head-to-Head
| Myprotein Impact Whey | Bulk Pure Whey | |
|---|---|---|
| Protein per serving | 21–23g | 21–23g |
| Protein type | Whey concentrate | Whey concentrate |
| Certification | Informed Sport | Informed Sport |
| Flavour count | 50+ | 30+ |
| Ships to US | Yes (us.myprotein.com) | No (UK and select EU only) |
| Founded | 2004 | 2006 |
| Owner | THG (The Hut Group) | Independent |
| Bag sizes available | 1.1lb to 11lb | 500g to 5kg |
Myprotein Impact Whey
The data: 21–23g protein per scoop (varies by flavour), approximately 103 calories per serving. Whey concentrate. Informed Sport certified — every batch tested for banned substances and label accuracy. From us.myprotein.com, May 2026: 5.5lb at $70.99 on sale, working out to roughly $1.29 per serving. Available in 50+ flavours including unusual profiles.
Who it’s for: Anyone outside the UK who wants Informed Sport certified whey at the lowest per-gram price. Anyone who wants flavour rotation across a long catalogue. High-volume buyers who finish large bags quickly.
The honest critique: Concentrate has 3–4g lactose per serving — choose Impact Whey Isolate if lactose-sensitive. Brand-direct pricing swings dramatically between sale and non-sale periods — buying off-sale is a mistake. Some flavours are widely loved, others widely panned; read recent reviews before committing to a 5.5lb tub of an unfamiliar flavour.
Myprotein Impact Whey on Amazon →Bulk Pure Whey
The data: 21–23g protein per scoop, whey concentrate. Informed Sport certified. Bulk (formerly Bulk Powders) was founded in 2006 with the same UK direct-to-consumer model as Myprotein. Bag sizes range from 500g to 5kg. UK and select EU shipping only — no US distribution.
Who it’s for: UK buyers who want the transparency of Bulk’s ingredient labelling — every product page shows exact ingredient quantities, with no proprietary blends. Buyers who want a slightly cleaner alternative to Myprotein’s product range. High-volume UK buyers buying 5kg bags during sale events.
The honest critique: No US shipping is a hard constraint — if you live in the US, this product is not available to you. Smaller flavour range than Myprotein. Per-serving cost is similar enough to Myprotein that the choice between the two for UK buyers usually comes down to which one is running a better sale on the day you buy.
Check price on Bulk.com →Which Should You Buy?
Choose Myprotein if
- You’re a US buyer (Bulk doesn’t ship to you)
- You want the widest flavour range in certified whey (50+)
- You want to stack flavour rotation across a long catalogue
- You’re an international buyer outside the UK/EU
Choose Bulk if
- You’re a UK buyer and Bulk is running the better sale that day
- You want transparent ingredient labelling with exact quantities
- You prefer a smaller catalogue with cleaner formulations
- You buy 5kg bags and want their large-bag pricing
FAQ
Does Bulk ship to the United States?
No. Bulk (formerly Bulk Powders) is a UK direct-to-consumer brand that ships within the UK and to select EU countries. They do not have US distribution. US buyers seeking a similar low-cost Informed Sport certified whey concentrate should choose Myprotein, which ships to the US from domestic fulfilment via us.myprotein.com.
Is Myprotein better than Bulk?
For US and most international buyers: yes, by default — Myprotein actually ships to your country. For UK buyers, the two are closely matched. Both are Informed Sport certified whey concentrates at similar per-serving prices. Myprotein has the wider flavour range. Bulk is often preferred for ingredient transparency.
Which has the better flavour range?
Myprotein, decisively — 50+ flavours including unusual options like Salted Caramel, Mocha, and Maple Syrup. Bulk’s catalogue is smaller but covers the standard chocolate, vanilla, strawberry, and cookies-and-cream profiles. If breadth matters, Myprotein wins.
Are both Informed Sport certified?
Yes, both Myprotein Impact Whey and Bulk Pure Whey are Informed Sport certified — meaning every production batch is independently tested for banned substances and label accuracy. Informed Sport is the certification most relevant to drug-tested athletes. See our safety testing guide for the full breakdown.
Related Resources
- Read the full Myprotein brand review
- Read the full Bulk brand review — UK-market context
- See our best protein powder guide for picks across all categories
- See ON vs Myprotein for the price benchmark comparison
- Read the whey protein guide for concentrate, isolate, and hydrolysate explained
- Learn what Informed Sport actually verifies
Last reviewed: by the protein.supply editorial team.