Types of Whey Protein Explained: Concentrate vs Isolate vs Hydrolysate vs Clear (UK 2026)

"Whey protein" is not one product. The tub you buy has been processed to one of four grades, and the grade changes the protein content, the price, the texture and who it suits. This guide explains each type in plain terms, shows what you actually pay per 25g of protein for each in the UK, and helps you pick the right one instead of overpaying for a grade you do not need.

The 4 types of whey at a glance

Every figure below is normalised to cost per 25g of protein, the only fair way to compare types with different protein densities. Prices move weekly, so use the live links for today's exact figure.

Whey concentrate

Whey concentrate is the standard grade and the one most people should buy. It is the least processed, which keeps the cost down and leaves in small amounts of fat and lactose. Protein density sits at roughly 70-80g per 100g, and it is consistently the cheapest type per 25g of protein in the UK, from around 70p on the best-value bags. It also keeps well: whey lasted at least 18 months at room temperature in a 2016 storage study, as our guide on whether protein powder expires explains.

Bulk Pure Whey Protein

1kg bag

Budget-friendly Informed Sport tested whey from Bulk with 50+ flavours. Consistently among the cheapest per serving in the UK.

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or compare all UK prices →

Bulk Pure Whey Protein

1kg bag

Pros

• + Among cheapest UK whey options
• + Huge 50+ flavour range
• + 22g protein per 30g scoop
• + Informed Sport batch tested

Cons

• – 70-75% protein purity only
• – Some flavours overly artificial
• – Can cause bloating if lactose-sensitive

Pros

• Among cheapest UK whey options
• Huge 50+ flavour range
• 22g protein per 30g scoop
• Informed Sport batch tested

Cons

• 70-75% protein purity only
• Some flavours overly artificial
• Can cause bloating if lactose-sensitive

Buy Pure Whey Protein →Price at retailerView on Amazon ↗

or compare all UK prices →

●Nutrition per scoop · 22.7g protein in 32g▼

Protein makes up 71%

of this 32g scoop · 120 kcal total

22.7g

4.8g

Protein22.7g

Carbs4.8g

Fat1.1g

Other3.4g

Unless you have a specific reason to pay more, concentrate is the value pick. Browse the cheapest whey concentrate prices to see today's options.

Whey isolate

Isolate is filtered further to strip out most of the fat and lactose, pushing protein density up to about 85-90g per 100g. It costs more per 25g of protein, usually near £1.00, and it is the right choice if you are lactose-sensitive, cutting, or want the leanest possible macros per scoop. For most people the extra cost over concentrate is not worth it: see our full whey isolate vs concentrate breakdown, or compare the cheapest whey isolate prices.

Hydrolysed whey (hydrolysate)

Hydrolysed whey is isolate that has been partially broken down ("pre-digested") so it absorbs faster. On paper that sounds better, but in practice the difference matters only in narrow cases: training fasted, needing protein inside a very tight window, or struggling to digest standard whey. It costs at least as much as isolate, so for the average lifter it is a premium you can skip.

Clear whey

Clear whey is an isolate processed to mix into a light, translucent, juice-style drink instead of a milky shake. It is refreshing, low in fat, and popular in summer, but it is the most expensive type per 25g of protein in the UK, typically from around £1.25. Buy it for the experience, not the value. See the cheapest clear whey prices or read the full clear whey protein guide.

Which type of whey should you buy?

• Most people, best value: whey concentrate. Same core protein, lowest cost per 25g.
• Lactose-sensitive or cutting: whey isolate. Leaner macros, lower lactose.
• Fastest absorption, niche needs: hydrolysate. Rarely worth the premium.
• Prefer a light, non-milky drink: clear whey. Priciest per gram, best texture.

Whichever grade you pick, compare on cost per 25g of protein rather than sticker price. The cheapest protein ranking does that maths for you across every UK retailer we track.

Types of whey FAQs

What are the different types of whey protein?

There are four main types: whey concentrate (the standard, best-value option at 70-80% protein), whey isolate (85-90% protein, lower in lactose and fat), hydrolysed whey (pre-digested for faster absorption) and clear whey (isolate-based with a light, juice-like texture).

Which type of whey protein is best?

For most people whey concentrate is best, because it delivers the same core protein as pricier types at the lowest cost per 25g. Choose isolate if you are lactose-sensitive or cutting, hydrolysate only if you need the fastest absorption, and clear whey if you prefer a light, non-milky drink.

Is whey isolate worth the extra cost over concentrate?

Usually not, unless you are lactose-sensitive or tracking macros tightly. The difference in results is small when total daily protein is matched, so concentrate is the better value for everyday use.

What is clear whey protein?

Clear whey is whey isolate processed to mix into a light, juice-style drink rather than a milky shake. It is refreshing and low in fat, but the most expensive type per 25g of protein, typically from around £1.25.

Is hydrolysed whey better?

Hydrolysed whey absorbs faster, but for most people it is not worth the premium. It only makes a practical difference if you train fasted, need protein in a very tight window, or find standard whey hard to digest.