While most varieties of soybeans can be used for making soy milk, it's important to use high-quality soybeans that are meant for human consumption. Some soybeans may be intended for animal feed or other purposes, and may not be suitable for making soy milk. It's also worth noting that different varieties of soybeans can yield slightly different flavors and textures of soy milk. In general, it's recommended to use organic, non-GMO soybeans that are intended for human consumption to make the best quality soy milk.