Weet-Bix is ??packed full of 97% whole grain goodness, and provides you with a good source of iron to help fight fatigue and fatigue, Vitamins B1, B2 and 3 to help release the energy you need to start your day, as part of a balanced diet. . Providing a natural source of high fiber, Weet-Bix is ??also low in fat and sugar and contains 5 essential vitamins and minerals.