When they evaluated the effect on GABA-producing cells, the researchers found that after an initial increase in GABA transmission lasting only a few minutes, GABA transmission decreased and did not recover fully for more than an hour after nicotine exposure ended
doi: 10.1186/s40168-017-0326-y 76 GreenwoodJ
In theory it makes perfect sense that it would be, but legally no one is allowed to make that claim at least not yet
(Meanwhile, Dollar General has not announced sales of tobacco, but it has been testing the category in Nevada since late 2011.) According to Family Dollar's own research, its shoppers overindex with tobacco products--more than one-third of heavy Family Dollar customers smoke, compared to the national average of less than 20%--and these smokers make more trips
"We thought we had, so to speak, kicked the habit, and yet were seeing an uptake again," she says
Ng Tikanga Paihere