It depends on the age of the peanut butter (fresh ground is better than off the shelf), the age of the peanuts before they were ground (conventionally grown peanuts in the grocery are often years old by the time they land on the grocery shelf), and the additives (less is better). Most peanut butter I’ve bought off the shelf smell vaguely or strongly rancid. (you DON’T want rancid). That’s why I try to buy fresh ground whenever possible. Organic is better than conventionally grown also, because you get more nutrients.