Weet-Bix is a high-fibre and low-sugar breakfast cereal biscuit manufactured in Australia and New Zealand by the Sanitarium Health and Wellbeing Company. Weet-Bix, the breakfast cereal, was developed by Bennison Osborne in Sydney, Australia in the mid-1920s. Weet-Bix is packed full of 97 percent wholegrain goodness, and provides you with a good source of iron and vitamins B1, B2 and B3 to help release the energy you need to kickstart your day. Providing a natural source of fibre, Weet-Bix is also low in fat and sugar.