Using Preservatives to Extend the Shelf Life of Your Products - FNWL Individuals who are sensitive to these preservatives need to find preservative- free products. Are there any natural preservatives? Not really. Natural substances ...
醃- 维基百科，自由的百科全书 除了採用天然的食鹽、白糖或蜂蜜來保持食物以外，化學品亦可以達到防腐的效果。 硝酸鹽及亞硝酸鹽都是常見的食物防腐劑 ...
