Hello Robert,
It is definitely a good idea to use food grade hoses.
The reason is that the hoses use chemicals in their manufacture to provide the flexibility to the material.in the cheaper garden hoses the either a cheaper chemical is used or it is not 'fixed' as effectively and it leaches out into the water in the hose.
Thats one of the reasons that old hoses become less flexible.
Food grade hoses lock the plasticisers more effectively.
Avoid using yellow hoses or fittings, as the colour is often derived from cadmium the exception is if they definately state they are food grade.