E-liquid may contain vegetable glycerin (VG), propylene glycol (PG), natural and/or artificial flavors, vitamins, and/or nicotine. E-liquids made with more VG will produce thicker denser vapor clouds. E-liquids using more PG produce less vapor but provide more sensation on inhale giving a feeling known as "throat hit" that is more similar to smoking. Nicotine can be harmful or even fatal if swallowed. Keep e-liquids and vapes away from children and pets. For adults only.