Myprotein vs Bulk UK 2026: Price, Formula and Taste Compared

There is no permanent cheapest brand. Myprotein and Bulk change prices by flavour, pack and promotion, so we use a buying threshold rather than declaring whichever brand has the largest sale badge the winner.

Choose Myprotein Impact Whey when its live cost per gram of protein is within 10% of the equivalent Bulk Pure Whey. At that small premium, Myprotein's wider flavour choice and two named testing certifications are useful differences. Choose Bulk Pure Whey when it is more than 10% cheaper, particularly for unflavoured powder going into oats, smoothies or baking.

Open the live Myprotein and Bulk price table for current products, pack sizes and cost per gram of protein. This review explains which products belong in the comparison and what the label changes in an actual shake.

A brand-wide average can put soy isolate, clear whey, concentrate and premium isolate into one number. That may identify the cheapest catalogue, but it does not tell a whey buyer which equivalent bag is better. We use four separate match-ups instead.

Impact Whey belongs against Pure Whey because both are everyday whey concentrates. Impact Whey Isolate belongs against Pure Whey Isolate. Vegan blends must be checked source by source, while plain creatine monohydrate should be compared by dose and delivered price rather than protein metrics.

The current Myprotein Vanilla label lists 72g protein, 379kcal, 8.9g carbohydrate and 5.9g fat per 100g. Its ingredient panel is 96% whey protein concentrate with lecithin, flavouring and sucralose. One 30g serving supplies 22g protein and 114kcal; Myprotein states that nutrition varies by flavour.

That is a complete dairy protein with naturally occurring essential amino acids and BCAAs. The 5g BCAA statement is not evidence of a separately added amino blend: Myprotein describes it as naturally occurring in the whey.

Use the exact Bulk flavour shown in the live comparison rather than copying Myprotein's numbers across. Cocoa, flavouring and sweeteners displace some whey in flavoured powders, so unflavoured and chocolate variants from the same brand can have different protein density.

Lecithin is the most relevant label clue for mixing. It helps whey disperse into liquid, so an instantised concentrate containing soya or sunflower lecithin should shake more easily than untreated whey. Myprotein's current Vanilla panel explicitly lists both possible lecithin sources inside the whey concentrate.

Cocoa tends to make chocolate powder feel fuller and can leave more residue than vanilla or unflavoured whey. Biscuit pieces, collagen additions and milkshake-style variants are different formulations again; they should not be used to describe the whole Impact range.

A label cannot prove that one powder tastes better. Water volume, temperature and personal sweetness preference matter. We therefore treat retailer star ratings as supporting evidence, not as a laboratory measurement, and do not award a blanket taste win from one review.

1. 1

   For water-only shakes: start with a mainstream vanilla or chocolate in the smaller available pack.

2. 2

   For oats and smoothies: unflavoured whey makes the brand price gap more important than flavour range.

3. 3

   For less sweetness: check the exact sweetener panel; do not assume every flavour within a brand is identical.

4. 4

   For fewer lumps: add liquid first, powder second, then shake; formulation cannot rescue poor preparation completely.

Myprotein currently states that Impact Whey is certified by Informed Choice and Informed Protein. Informed Choice addresses banned-substance risk through an independent testing programme, while Informed Protein verifies that the labelled protein content is accurate.

That distinction matters most to drug-tested athletes and buyers concerned about amino spiking or label accuracy. It does not make Myprotein's whey biologically more complete than another genuine whey concentrate, but it is a reason we allow Myprotein a modest premium when live prices are close.

Bulk may provide quality documentation for individual products or batches, so check the exact product page rather than transferring a certification from one range to every Bulk bag.

We calculate the usable protein inside the bag, then divide the final tracked price by those grams. This prevents a low-protein flavour, altered bag size or oversized serving from looking artificially cheap.

For example, if matched Myprotein and Bulk bags cost 4.0p and 3.8p per gram of protein, Myprotein is only 5.3% dearer and remains our pick. If they cost 4.5p and 3.8p, Myprotein is 18.4% dearer and Bulk wins. Delivery can move a small order across that line, so confirm the basket total.

Prices in prose become stale quickly. Use the embedded comparison or the live whey table for today's figure, then apply the same 10% rule.

Myprotein's high reference prices and frequent codes make the percentage discount a poor measure of value. Bulk also runs promotions. In both cases, record the payable price for the exact flavour and size, not the crossed-out price or the largest reduction elsewhere in the promotion.

Treat subscription pricing as a separate purchase mode. It is useful only if the saving remains competitive and the delivery interval matches how quickly you finish the bag. Compare single purchase with single purchase first, then subscription with subscription.

A small bag can lose its apparent advantage once delivery is included. A large bag can reduce cost per gram but should not be called a saving if it forces you to buy more than you need. The live comparison exposes pack total, serving cost and protein cost so you can choose the metric that matches your budget.

1. 1

   Check the final code-adjusted product price.

2. 2

   Add unavoidable delivery for the basket you will actually place.

3. 3

   Keep subscription prices separate from one-off prices.

4. 4

   Compare the exact size and flavour, because eligibility can differ.

5. 5

   Ignore the advertised percentage until the final cost per gram is known.

Buy Myprotein if you want the largest flavour choice, named third-party certification matters, or its equivalent bag sits within 10% of Bulk on live protein cost. Its current catalogue includes classic, reduced-sweetness, milkshake, collaboration and naturally derived sweetener variants, which gives you more formulation choices but also makes exact-label checking essential.

Buy Bulk when Pure Whey creates a saving greater than 10%, you mainly mix powder into food, or an unflavoured workhorse is the goal. At that point the price difference is large enough to outweigh Myprotein's range and certification advantage for most non-tested buyers.

Buy neither automatically if isolate, vegan protein or digestion is the real requirement. Compare the relevant format across the whole market: a third brand can beat both on lactose, ingredients, amino-acid balance or live price.

Myprotein is our narrow overall winner, not our winner at any price. Impact Whey earns a premium of up to about 10% per gram of protein through its unusually broad flavour range and current Informed Choice and Informed Protein certification.

Bulk is the rational winner when its matched product is more than 10% cheaper. The whey remains a complete protein, and buyers using it in food or choosing unflavoured powder gain less from Myprotein's larger flavour catalogue.

Open the live Myprotein and Bulk price table before ordering. If both look poor, use the cheapest protein powder UK ranking or current protein powder deals rather than forcing a two-brand decision.