I have used Dextrose tablets for over 20 years and the product has never given me thrush. Slow release foods are useful, I use dried fruits and nuts, bananas, muesli as I can't tolerate eggs.
NAPS told me to eat every 3 hours, 24/7, 12/52. I have a packet of biscuits by the bed so that when I get out of bed I nibble B4 going back to sleep.