You will find that the chemical company testing Pillbox's liquid made a very positive report, suggesting, however, that the safer VG be substituted for PG. I'm sure that's where the conclusion comes from, since you're not going to find tests that compare inhaling the two substances.
Thx TB. I've only read the studies you posted about PG, from that Doctor in ¿New Zealand?, and the previous ones from that other Doctor, about bactericidal properfies of PG and the experiments with monkeys. Thay all said till now that PG seems to be safe.
Where can I find that other report about VG?