From my experience, the TH can come from pg as well. Pg is thinner, carries flavor, and enhances TH, VG, is thicker and smoother, and is the cause of the nice vapor. I hope that helps define the two for you.. SInce th is important to you, Id definately recommend getting the 100% pg nicotine, cut, and then mix to your liking!! Remember that when you are ready to commit to a shopping cart for nicotine, you make sure you have pg, and vg (NO NIC) for your mixing... Purchasing flavors is addicting, and doesnt seem real cost effective in the beginning, but once it arrives and you get the hang of it, you will save yourself tons....