Brand comparison
Optimum Nutrition vs Rule 1 Proteins: which is cheaper in Australia?
Today, Optimum Nutrition’s cheapest in-stock product works out to $75.31/kg of protein and Rule 1 Proteins’s to $72.76/kg. We track 10 Optimum Nutrition products and 18 Rule 1 Proteins products across every Australian retailer we scrape daily.
At a glance
Side-by-side
| Metric | Optimum Nutrition | Rule 1 Proteins |
|---|---|---|
| Products tracked | 10 | 18 |
| Best $/kg protein | $75.31 | $72.76 |
| Avg $/kg protein | $116.52 | $117.30 |
| Retailers stocking | 4 | 4 |
| Country | United States | — |
| Founded | 1986 | — |
FAQ
Optimum Nutrition vs Rule 1 Proteins, answered.
Which is cheaper today — Optimum Nutrition or Rule 1 Proteins?
On a $/kg-of-actual-protein basis, Rule 1 Proteins is cheaper right now. Rule 1 Proteins's cheapest in-stock product works out to $72.76/kg of protein, vs Optimum Nutrition's $75.31/kg. Prices are re-scraped daily, so the answer can change overnight.
How do you compare Optimum Nutrition and Rule 1 Proteins?
We pull the best in-stock price for every product from each brand across every Australian retailer we track, then convert each to a single $/kg-of-actual-protein figure using the formula: price ÷ (size_grams × protein_percentage / 100 / 1000). That controls for protein density, so a $35 WPC at 75% protein and a $40 WPI at 90% protein are compared apples-to-apples. Full methodology on the methodology page.
Where can I buy Optimum Nutrition and Rule 1 Proteins in Australia?
Optimum Nutrition is currently in stock at 4 retailers we track; Rule 1 Proteins is at 4. The product pages list every retailer with a current price and stock status — click through to the leaderboard for live links.