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. 2022 Sep 20;27(19):6165. doi: 10.3390/molecules27196165

Table 1.

The level of gluten contamination in products purchased in gastronomic point (ppm).

Product Positive Samples Min Max Mean STD Me Q25–Q75
Fries 0/4 (0%) nd nd nd nd nd nd
Ketchup 0/3 (0%) nd nd nd nd nd nd
Cake * 1/4 (25%) nd 79.26 19.82 39.63 nd nd

STD—standard deviation, Me—median, Q25–Q75—interquantile range, *—labelled as “gluten free”, nd—not detected.