The burning feeling often expert with snus is caused by the nicotine itself (just like the tingle of nicotine gum) and a few food stuff additives for instance sodium carbonate (E500). Sodium carbonate is a food items additive used to raise the pH from the tobacco (lessen the acidity). [53] https://images.google.es/url?q=https%3A%2F%2Ficyshop.es%2F%3Fcollections%2Fsnus