Yes, VG is one of the mixtures/carriers for the nicotine.
There are many suppliers out there that carry a different mixture content on the VG or PG amount.
Some do 80PG/20VG and then some 70/30 and some 50/50 and some 100% and all for different
reasons.
VG also helps give you more vapor. But with that being said, my experience with a 50/50 mix
really made me "pull harder" to inhale, because it is a thicker mix than PG.
More PG%, appears to give a harder TH and if that is not what you want, then you need a different ratio mix in your juice. I also have learned that high NIC content also effects the TH. More Nic/higher TH.
Many vendors offer different mix ratios. Check some of them out, order some small bottles and give those a try
and see what works for you.
You can also get VG at Walmart and add a few drops to one of your juices. It will cut the nic content and some of the juice flavor perhaps, but it may be what works for you.
Good Luck and Happy Vaping.