Jarred salsa barely has any nutritional value if the back of the label is to be believed so I'd say no. Like, black beans should have a ton of potassium in them but if you buy black bean and corn salsa it'll have very little potassium so I'd assume any of the other nutrients like vitamin A that aren't required to be on the label are also lacking.
But it tastes good so who cares.
My continued existence proves it is possible to subsist on homemade salsa so I say it counts