Supplements · Protein

PROTEIN POWDER IN AUSTRALIA

WPI, WPC, blends, plant-based — we track prices across Australian retailers and cut through the marketing noise. The cheapest price per gram of protein is what matters.

Best value WPI right now

Bulk Nutrients WPI 1kg

~$49.90 at Bulk Nutrients · ~$4.99 per 100g · 90%+ protein content

See full price comparison →

Protein types

All WPI WPC Casein Plant-based Blends

Protein types explained

WPI

Whey Protein Isolate

90%+ protein by weight. Low fat, low carb, fast-absorbing. The best option for most people if budget allows.

Price range: $45–$80 / 1kg

WPC

Whey Protein Concentrate

70–80% protein by weight. More affordable than WPI. Small amount of fat and lactose. Good option for most goals.

Price range: $30–$55 / 1kg

Casein

Micellar Casein

Slow-digesting. Best taken before bed. Keeps amino acid levels elevated for 6–8 hours. Less popular but has legitimate use cases.

Price range: $50–$80 / 1kg

Plant

Plant-based protein

Pea, rice, hemp blends. Lower bioavailability than whey but improving significantly. Necessary for vegans; optional for others.

Price range: $40–$70 / 1kg

Guides & reviews

All guides →

Price tracker

Cheapest whey protein in Australia — tracked across 14 retailers

Updated June 2026. WPI and WPC prices ranked by cost per 100g of protein across major Australian retailers.

5 min readRead →

Brand review

Bulk Nutrients review — is it really Australia's best value protein brand?

Pricing, quality, taste, and whether the hype is justified. Honest take with no brand deal.

7 min readRead →

Comparison

Bulk Nutrients vs Myprotein — which is better value in Australia?

The two most price-competitive brands in Australia head to head. Who wins?

8 min readRead →

Key facts

1.6–2.2g

Protein per kg bodyweight

Daily target for muscle building. Most people get 0.8–1.2g from food alone.

25–30g

Per serve

Optimal single-serve amount for muscle protein synthesis. More doesn't mean better.

90%+

WPI protein content

What you're paying for. Check the label — some products pad with fillers.

$4–6

Per 100g (good value)

For WPI. Anything over $8/100g is overpriced unless it's a specialist product.

What to look for

✓

Protein percentage per serve — divide protein grams by total serve size. 80%+ is good for WPC, 90%+ for WPI.

✓

Complete amino acid profile — whey is a complete protein. If buying plant-based, look for pea + rice blends which together provide a complete profile.

✓

Cost per 100g of protein — not cost per 100g of powder. This is the real comparison metric.

✗

Amino spiking — some cheaper products inflate protein numbers with cheap amino acids like glycine or taurine. Check for third-party testing.

✗

Excessive additives — creamers, thickeners, and fillers add weight to the bag without adding protein. Check total carbs and fat relative to protein.