Hi Roger,
Australia is very strict on what you can and can't take in to the country. If the food supplements are fitness related or a type of shake then no, you will not be able to take these into the country.
If they are vitamin tablets then you should treat them as if they were prescription medication.
When travelling with prescription medication, you will need to have these in your hand luggage, in the original packaging and with a copy of your prescription.
Kindest regards,
Julia