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jeffbailey t1_iuc8u6w wrote

The more expensive ones have lactose, which is an allergen.


fuzzygondola t1_iud38js wrote

The lactose can't be a requirement for another propellant to work, right?


jeffbailey t1_iudz7ej wrote

Not my field :). When I asked a friend why they used lactose, he said that it increases absorption.