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# What gasses does a device measure?

AIRE, our generation one device, measures hydrogen (H2) gas only. Hydrogen is the key indicator for FODMAP intolerances in the large majority of people.

AIRE 2, our latest device which launched in early 2022, measures both hydrogen and methane. If you know you are a methane producer, suspect you produce methane or if you simply want a more complete picture, AIRE 2 would be a good option for you.