Hemp seeds are now available in the supermarket. If I eat these with my muesli will they show on a drug and alcohol test?

No

Food Standards Australia and New Zealand (FSANZ) announced in 2017 that hemp seeds can be classed as a food. This is because there are very low levels of psychoactive components in these seeds as they come from different strains of the cannabis plant. Hemp seeds have high levels of protein, vitamins, minerals and polyunsaturated fatty acids (esp. omega-3 fatty acids) making them a rich source of nutrients.

But, be careful, hemp seeds or other cannabis products which are available from off-shore outlets may not be from the low THC varieties of Cannabis sativa. These are a different story completely. The same also applies to cannabis oil products available by prescription in Australia or from overseas suppliers. Cannabis oil products are gaining popularity for the treatment of multiple conditions (e.g. during chemotherapy for appetite, pain and anti-emesis). These products will still give a positive for an on-site test (and later lab confirmation). A current and valid Australian prescription will be required for the use of these products. Without a prescription, and for purposes of workplace policy, it doesn’t matter what the source of the THC may be – if it is a positive it is still a sanctionable event.