When it comes to measurements, the everyday kind that deal with things like air pressure, tire pressure, blood pressure, etc., there is no such thing as an absolute accuracy. And yet, as with most things, scientists are able to come up with a relatively accurate way of gauging these things by measuring them relative to other things.
Quick Answer. Eating coffee grounds is not bad for an individual's health, according to Sandeep Godiyal for Natural News. In fact, coffee grounds are very high in antioxidants and nutrients, even when they are used to make coffee.
Tip: Use Coffee Grounds To Deter Slugs. I found out by accident one day that slugs hate coffee. I had spilled some from my cup while working in the garden and a slug nearby reversed course and ran away from the coffee. So I began saving used coffee grounds and sprinkling them around my plants.