However, plastic contains some chemicals that may contaminate in the food. Therefore, Mu Yor sausage with thick wrapping of banana leaves is more famous. Mu Yor sausage in a plastic wrap often contains preservatives, so it can be kept longer; it is not easily detected whether it is spoiled or not. Kietnitiprawat (2007) found, under the food product survey by the Medical Science Center of Ubon Ratchathanee province, that 17 out of 27 collected Mu Yor sausage contained benzoic acid higher than the set standard of 1 g per 1 kg of food (Thai Community Standard, 2003).