Protein powder: types, labels and the real cost
The main types of protein powder, how to read the nutrition panel, and a simple formula for comparing products on cost per 30 g of protein.
Updated 15 November 2026 · Published by Radiant Life Distributors
The main types
| Type | What it is | Label note |
|---|---|---|
| Whey protein concentrate (WPC) | Protein from milk whey, less refined | Usually lower protein per 100 g than isolate, and contains some lactose |
| Whey protein isolate (WPI) | Whey filtered further to remove more fat and lactose | Usually higher protein per 100 g; check the panel for lactose |
| Casein | The other main milk protein | Often in blends |
| Plant proteins | Pea, rice, soy, hemp and blends | Often blended; check allergens and the protein per serve |
| Collagen | Protein from animal connective tissue | Sold for different reasons from whey or plant protein; compare separately |
Reading the nutrition panel
Protein powders are sold as foods, so every pack carries a nutrition information panel with two columns: per serve and per 100 g. Use the per-100 g column to compare products — serve sizes vary between brands, so per-serve figures can mislead.
- Protein per 100 g — the clearest measure of how concentrated a powder is.
- Sugars, carbohydrate and fat — these vary a lot between flavoured products.
- Ingredient list — ingredients are listed in descending order by weight, so the protein source should be first.
- Allergens — milk, soy and gluten are the common ones.
Cost per 30 g of protein
The fairest price comparison is how much you pay for a fixed amount of protein. Work it out as:
Price ÷ pack weight in grams ÷ (protein per 100 g ÷ 100) × 30 = cost per 30 g of protein
Example: a 1 kg tub at $60 with 80 g protein per 100 g costs $60 ÷ 1000 ÷ 0.8 × 30 = $2.25 per 30 g of protein.
Where to buy
Mega Health stocks whey, plant and collagen proteins in its sports nutrition range.
General information only, not medical advice. Supplements are not a substitute for a varied diet. Always read the label and follow the directions for use, and check with your pharmacist or doctor before starting a supplement, especially if you take other medicines, are pregnant or are managing a health condition.
Questions
What is the difference between whey concentrate and whey isolate?
Isolate is filtered further to remove more fat and lactose, so it usually has more protein per 100 g. Check the nutrition panel for the actual figures.
How do I compare protein powders?
Use the per-100 g column of the nutrition panel, and work out the cost per 30 g of protein: price ÷ pack grams ÷ (protein per 100 g ÷ 100) × 30.
Do protein powders need an AUST L number?
No. Protein powders are generally sold as foods, so they carry a nutrition information panel rather than an AUST number.