Yet if you see me at a Sainsbury’s on the weekend, it’s like I’m shopping for a different person. The kind of person who eats crunchy carrots and radishes, breakfasts on organic oatmeal and drinks chamomile tea. Every Sunday afternoon is pretty much an exercise in optimism – with purchases of what feels like eight kilos of fresh fruit, muesli bars, authentic pesto from an authentic Italian man at the market, non-fat non-saturated no calorie yoghurt (i.e. white coloured water) and juice enough for your average kindergarten class.
Come Wednesday evening though and I can usually be found in front of the television munching nachos at 1 am while a disapproving pile of oranges watches over me.

nice one!
This happens to me all the time. You start out with a zest for all things healthy and you end up eating the most ridiculous pile of junk.
So, hang in there, you are not alone.