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.
Since coffee grounds also help plants to grow, you can expect that there will be some weeds that will grow better after being treated with the grounds. After all, weeds are just plants. If you believe that coffee grounds make plants grow better, then you have to believe that they will also make weeds grow better. Coffee Grounds Repel Cats