I thought I would look at this 20ppm that is pushed at the coeliac population just to see what it really means. Shockingly, it is far worse than I thought and certainly not as minute an amount that I thought it may be. The reason why I was astonished at the size of the quantity that is deliberately being stated as 'safe for coeliacs to consume' was I thought it must be so tiny you can suck it up by breathing it in during a gust of wind. For why would any person state that it is safe if it was larger than this? And to make matters worse - this is surely on the assumption that a person will only eat a presumed amount of portions containing the 20ppm in a 24 hour period. The amount a person is consuming is left for themselves to work out: maths books at the ready time to do your sums!!
Well let us look at an ordinary piece/slice of bread - this allegedly contains 124,000 parts per million of gluten or 3,515 milligrams of gluten. If we look at a 'gluten free loaf' with an allowed amount of 20ppm then one slice would equal slightly more than1/2 milligram of gluten which is 500 micrograms, which for a person with coeliac disease is quite a lot. To make it easier still to understand vitamin tablets are measured in micrograms - if you were taking 500 micrograms of a vitamin it wouldn't be classified as a small amount.