I remember these 'slimming biscuits' from when I was a kid in the 60s, but I think they were around long after that. My mother who was on a perpetual diet would never let me have them because they were 'not for children' and so I believed that something terrible would happen to me if I ate one! I think my mum just ate them like normal biscuits. I'm sure a better way would have been just to give up biscuits altogether.
Do You Remember Limmits Biscuits?
Do You Remember Limmits Biscuits?