How much salt is toxic?
Fatal salt overdoses are rare, as they require people to consume amounts of salt nearing 0.2–0.5 grams per pound (0.5–1 gram per kg) of body weight. You could play one Round with me and get over that amount :)

Salts can be classified in a variety of ways. Salts that produce hydroxide ions when dissolved in water are called alkali salts. Salts that produce acidic solutions are acid salts. Neutral salts are those salts that are neither acidic nor basic. Zwitterions contain an anionic and a cationic centres in the same molecule, but are not considered to be salts. Examples of zwitterions include amino acids, many metabolites, peptides, and proteins.