http://en.wikipedia.org/wiki/Potassium_chloride
Orally, KCl is toxic in excess; the LD50 is around 2500 mg/kg (meaning that a lethal dose for 50% of people weighing 75 kg (165 lb) is about 190 g (6.7 ounces), or about 38 teaspoons). Table salt is about as toxic. Intravenously this is reduced to just over 100 mg/kg, but of more concern are its severe effects on the cardiac muscles; high doses can cause cardiac arrest and rapid death, ergo its aforementioned use as the third and final drug delivered in the lethal injection process.
Si je me souviens bien, Nutrimuscle-Conseil parle de prendre 15-20 g de KHCO3 par jour.
1 g de KCl contient autant de potassium (K) que 1;34 g de KHCO3.... les 15-20 g de KHCO3 correspondent au niveau quantité de potassium à 11,2-15 g de KCl. On est à moins de 10 % de LD50