definitely not. the packaging of Yonghe soybean milk powder is well sealed, and the water content of soybean milk powder is less than 5%, which is an important factor for the long-term preservation of the product. When you open the package, do you find that the tear will quickly absorb small drops of water? This is the result of very dry inside the package. Therefore, there is no need to worry about deterioration and dampness. Moreover, because of the instantaneous sterilization at high temperature during production, there will be no bacterial infection, so don't worry! !