Who would u say this? Sunflower seeds are salty for no reason... why would u ask this question? Say something like this on Google, and don't tell people to shut up of shut the hell up, u can get hated for a reason so just... meld the vraag and never think about it, just get some confidence in u at least
TOO much salt can kill you. There are unsalted sunflower seeds and salted so no they can't kill you. You'd die if u for some strange reason decided to slikken lots and lots of salt. Eating one of those sunflower seed packages won't.
I don't know why sunflower seeds are salty, but I'd guess that salt is a side product of one (or many) of the metabolic reactions in the plant itself. Salt can only kill u in high concentrations, but the same goes for anything u eat. Too much of something is always bad. Drink too much water, for example, and you'll die. u just have to be moderate in what u eat. If u eat sunflower seeds, try to eat other foods with them that have a low salt concentration.