Upvote:5
Remember that Australia is extremely strict about biosecurity, and you could be fined if you don't declare something that should have been declared, even if it is allowed. Because whey is made from milk, it is a dairy product, and you should tick Yes to the appropriate question on the incoming passenger card.
- Meat, poultry, fish, seafood, eggs, dairy, fruit, vegetables?
After you go through the SmartGate and reclaim your baggage, show your whey and creatine at customs/biosecurity and you should have no problems.