One way it could be ‘the processing, not the ingredients’ is that in many cases the fibre is either removed or deconstructed (making it less useful in slowing down the metabolism of sugars), another is that water is removed (although I’m not sure why that’s bad exactly). This is one of the key arguments endocrinologist Robert Lustig makes against industrially-processed foods, particularly ones with added sugar, bc the fibre cannot help slow down the metabolism of the sugar because it’s broken up or removed.
One way it could be ‘the processing, not the ingredients’ is that in many cases the fibre is either removed or deconstructed (making it less useful in slowing down the metabolism of sugars), another is that water is removed (although I’m not sure why that’s bad exactly). This is one of the key arguments endocrinologist Robert Lustig makes against industrially-processed foods, particularly ones with added sugar, bc the fibre cannot help slow down the metabolism of the sugar because it’s broken up or removed.