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Date: | Wed, 21 Jul 2004 21:27:13 -0700 |
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<<Disclaimer: Verify this information before applying it to your situation.>>
The new study claiming 100ppm gluten is safe for celiacs resulted in
many folks asking what that meant 'in real life'. So I decided to put
PPM in perspective:
- Simply put 100ppm means if you have one million of something, 100 out
of that million makes 100ppm. It can be a million of anything -
oranges, cars, grams of fat or ounces of gluten.
So let's stick to our favorite topic: gluten. To make the math easier I
will first calculate what 150ppm amounts to in real life.
- Total protein ( not all of it is gluten ) composition of wheat
ranges from 8% to 15%. In ppm that translates to 80,000ppm to
150,000ppm protein ( mostly gluten )
- So, a product with 150ppm gluten has 1/1000 ( 150/150,000 ) the
gluten of wheat. In human terms, take a slice of wheat bread and
cut it into 1000 pieces - crumbs.
150ppm is the gluten you would get in one of those crumbs.
How much gluten is that in weight: Take a 16-slice loaf of bread
baked with 500g ( a bit more than 1lb) of wheat flour:
500grams * 15%
------------------------------- = 0.005 grams, about 0.0002 oz.
16 slices * 1000 'crumbs/slice'
So, the new study that claims 100ppm of gluten is safe for celiacs
translates to 100ppm/150ppm or 2/3 of the number calculated above:
100ppm is equivalent to about 0.003 grams or 0.0001 oz. of gluten
Regards,
Dimitrios Douros
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