Was it in the fridge and does it have the skin still on? Just an aside- if you add garlic to oil and leave it at room temp it can grow salmonella in a couple days- so never make your own garlic oil except immediately before you use it.
I don't think this exists for humans yet, unfortunately - but what I think would be the healthiest mattress (and virtually free of dust-mites, even bed-bugs which inflict some homes recently) for humans would be the same as the healthiest for pets...