The baking soda dried very quickly and then left white, chalky dust wherever I was. Did it help? Not quite sure. I was too busy rubbing off the dust but I did notice that the lack of itch was a bit longer than the other items I had tried.
The last food that I tried was lemon juice. Lemon juice is to stop the spread of the poison ivy which was not helpful to me since I applied it after I started to stem poison ivy on all of my limbs. Note to self- read articles thoroughly, do not skim. Luckily, the lemon juice smelled better than the vinegar and I was only met with the familiar odd looks.