Nobody likes having their blood drawn.
Peeing in a cup isn’t so bad but it’s far from convenient.
But typically these are the biological fluids that nurses ask us to provide.
Except for the finger prick of blood glucose testing this usually must be done on location at a diagnostic lab.
Upon relinquishing our ephemera we go home and wait a few days for the results.
But what about spit?
Saliva is a dispensable, non-invasive fluid that’s full of ions – hormones – antibodies and other proteins – it even contains DNA.
And it’s in your mouth – which is where it could stay while you test yourself at home.
And how do researchers propose delivering those results?
Via a truly universal interface: taste.