Is vomiting due to the salty taste?
From what I understood, vomiting is your body's way to expel a toxic substance. From what I've read no one has reported vomiting due to the taste of SN, nor the test runs with salt water. People have described it as salty, similar to a broth and I think one person referenced the ocean. But generally speaking the taste should not be the reason for vomiting.
Fear or nervousness can also induce vomiting, if you are not ready to die and haven't made your peace, knowing you are ingesting something toxic can lead to a very high degree of anxiety, triggering the vomiting reflex.
Maybe if you don't like the taste of something salty, you can practice to get more comfortable with salty taste, if that is what you are afraid of? But I don't think it will reduce your likelihood of vomiting, unless anything salty makes you vomit already.