It's a sublingul spray (under the tounge, but will work with regular digestion). Nano means nanomulsions, which allows oil to be mixed with water. That's what allows thc, which dissolves in oil but not in water, to be added to a more liquid substance. Say, an oral spray or a seltzer. Some people say it makes it stronger but I personally see no difference in streangth. it does come on much quicker. Especially under the tounge