Quick answer
"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.
Type | Protein / 100g | From / 25g | Best for | Compare Concentrate | 70-80g | ~70p | Best value, everyday use | View Isolate | 85-90g | ~£1.00 | Lower lactose, leaner macros | View Hydrolysate | 85-90g | ~£1.00 | Fastest absorption (niche) | View Clear whey | 80-90g | ~£1.25 | Light, juice-style drink | View
Whey concentrate
Whey concentrate is the standard grade and the one most people should buy. It undergoes the least processing, which keeps costs down and leaves in small amounts of fat and lactose. Protein density sits at roughly 70 to 80g per 100g, and it stays consistently the cheapest type per 25g of protein in the UK, from around 70p on the best-value bags.
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 goes through further filtering to strip out most of the fat and lactose, pushing protein density up to about 85 to 90g per 100g. It costs more per 25g of protein, usually near £1.00, and makes sense 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 the full whey isolate vs concentrate breakdown, or compare the cheapest whey isolate prices.
Community perspective
What others are saying
Anecdotes are useful for spotting recurring taste, texture and convenience issues, but they are not evidence of effectiveness.
Hydrolysed whey (hydrolysate)
Hydrolysed whey is isolate that has been partially broken down (essentially pre-digested) so it absorbs faster. That sounds appealing on paper, 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 worth skipping.
Cheapest Whey Protein
Sports Fuel Premium Protein
Bodybuilding Warehouse · 5kg
Clear whey
Clear whey is an isolate processed to mix into a light, translucent, juice-style drink instead of a milky shake. It tastes refreshing, stays low in fat, and gets 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 rather than the value. See the cheapest clear whey prices or read the full clear whey protein guide.
Which type of whey should you buy?
Whichever grade you pick, compare on cost per 25g of protein rather than sticker price.
- 1
Most people, best value: whey concentrate, delivering the same core protein at the lowest cost per 25g.
- 2
Lactose-sensitive or cutting: whey isolate, for leaner macros and lower lactose.
- 3
Fastest absorption, niche needs: hydrolysate, rarely worth the premium for most lifters.
- 4
Prefer a light, non-milky drink: clear whey, priciest per gram but with the best texture for that use case.
Frequently asked questions
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 or hydrolysate (pre-digested for faster absorption) and clear whey (isolate-based with a light, juice-like texture). Concentrate suits most people; the others solve specific needs.
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 and want leaner macros, 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. Isolate is higher in protein per 100g and lower in lactose, but the difference in results is small when total daily protein is matched. Concentrate is the better value for everyday use.
What is clear whey protein?+
Clear whey is whey isolate processed to mix into a light, translucent, juice-style drink rather than a milky shake. It is refreshing and low in fat, but it is the most expensive type per 25g of protein in the UK, typically from around £1.25.
Is hydrolysed whey better?+
Hydrolysed whey is pre-broken-down for faster absorption, but for most people it is not worth the premium. It only makes a practical difference if you train fasted, need protein within a very tight window, or find standard whey hard to digest.