What’s the difference between protein powders?

by Nick Cowling on Wednesday 08 July 2026

3 min read

What's the difference between protein powders?

There are so many types of protein powder to choose from: whey isolate, concentrate, casein, collagen, the list goes on. If you're feeling a bit of decision paralysis, then you've come to the right place. 

In this guide, we’ll walk you through how protein powders work, the benefits of some common types of protein powder, and how protein powders should be used. We’ll also share the best protein powder for muscle gain and weight loss. 

How protein powders work

Protein powders are designed to boost your protein intake in addition to your dietary sources. Their protein comes from plant and animal sources. These powders deliver concentrated amino acids – found in proteins – directly into the body. Amino acids support muscle growth and repair, as well as protein absorption in the body. 

While they contain high levels of protein, they should be used as a supplement only, not as a replacement for protein gained through your daily food and drink consumption. 

What are the types of protein powder?

The main types of protein powder are: 

  • Whey, 
  • Casein, 
  • Collagen, and 
  • plant-based.


Since they come from different protein sources, their benefits differ too. Make sure you pick the right powder for your exercise routine and your goals.b 

Whey protein powder

Derived from milk, whey protein powders are known for their rapid absorption and high amino acid levels. This combo makes it a popular choice for fitness enthusiasts. 

Whey concentrate v isolate

One thing to consider with whey protein powders is the difference between whey isolate and concentrate.

  • Whey isolate is processed at higher levels than concentrate and has higher purity. This means you’re getting slightly more protein per serve, also it has no lactose which means lactose-intolerant fitness fans can drink it to their heart’s content (sticking to the recommended intake, of course). 
  • Whey concentrate is less refined than whey isolate, but is still high in amino acids. It contains more lactose, fat, and natural milk compounds than whey isolate, giving it a creamier and richer taste. It’s a great option for people wanting a reliable protein powder.  

Consumption of whey protein powder can also assist in weight management. This can make it the best protein powder for weight loss if you’re lactose intolerant.

Casien protein powder

Like whey, casein protein powder comes from milk. Unlike whey protein powder, casein releases its amino acids slowly. This can be better if you want to take it before bed for overnight muscle repair

Collagen protein powder

While it sounds like it’s something you take after cosmetic surgery, collagen protein powders derive their amino acids from animal collagen. This supplement powder is best for improving the health and function of bones, connective tissues, joints, and skin

Plant-based protein powder

Plant-based protein powders are sourced from peas, rice, soy and even hemp. Its rich, plant-based sources make it the best protein powder for muscle growth for vegetarians, vegans, and people with meat and dairy dietary restrictions. 

How you should use protein powders

  • Whey protein powder. Best used straight after a workout, because they're fast-acting properties help with muscle growth.
  • Casien protein powder. Take it before bedtime to supply your body with amino acids while you sleep. 
  • Collagen protein powder. For optimal muscle repair and growth, collagen protein powder should be taken one hour after exercising.
  • Plant-based protein powder. Take it within two hours of a workout for the best chance at recovery and muscle growth. 

If you’ve got any more questions about protein powders or protein products, like which protein snacks are best for you, have a chat to our Personal Trainers

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