What cigarette do doctors says causes less throat irritation? In the 1930s and 40s, tobacco companies would happily tell you it was theirs. Doctors hadn鈥檛 yet discovered a clear link between smoking and lung cancer, and a majority of them actually smoked cigarettes. So in cigarette ads, tobacco companies used doctors鈥 authority to make their claims about their cigarettes seem more legitimate.

To the modern-day reader, the pitching of cigarettes as healthy (even to youth and pregnant moms) and the use of doctors鈥 endorsements may appear horrifying. Yet before 1950, there wasn鈥檛 good evidence showing that cigarette smoking was bad for you.

鈥淧eople started to get worried in the 鈥40s because lung cancer was spiking; the lung cancer death rate was going through the roof,鈥 says , a history and social sciences professor at Massachusetts College of Pharmacy and Health Sciences. 鈥淧eople noticed that and were worried about it, but that didn鈥檛 mean they knew it was cigarettes.鈥

Yes, cigarettes did cause coughing and throat irritation. But companies used this to their advantage to promote their product as better than the competition. It wasn鈥檛 all cigarettes that gave you problems鈥攊t was just those other ones.

The first cigarette company to use physicians in their ads was American Tobacco, maker of Lucky Strikes. In 1930, it published an ad claiming 鈥20,679 Physicians say 鈥楲UCKIES are less irritating鈥欌 to the throat. To get this number, the company鈥檚 ad agency had sent physicians cartons of Lucky Strike cigarettes and a letter asking if they thought Lucky Strikes were 鈥渓ess irritating to sensitive and tender throats than other cigarettes,鈥 while noting 鈥渁 good many people鈥 had already said they were.

1937 Philip Morris advertisement claiming their brand cleared up irritation of the nose and throat.

Unsurprisingly, many doctors responded positively to this biased, leading question, and Lucky Strike ads used their answers to imply their cigarettes must be medically better for your throat. In 1937, the Philip Morris company took that one step forward with a Saturday Evening Post ad claiming doctors had conducted a study showing 鈥渨hen smokers changed to Philip Morris, every case of irritation cleared completely and definitely improved.鈥 What it didn鈥檛 mention was that Philip Morris had sponsored those doctors.

Philip Morris continued to advertise 鈥渟tudies鈥 it sponsored through the 1940s, the decade that saw the introduction of penicillin. 鈥淭he American public is thinking about medicine in such a positive way and science in a positive way,鈥 says , who co-authored an about doctors in cigarette ads. 鈥淪o framing it that way seems like it鈥檒l help appeal to people.鈥

To this end, the R.J. Reynolds Tobacco Company created a Medical Relations Division and advertised it in medical journals. Reynolds began paying for research and then citing it in its ads like Philip Morris. In 1946, Reynolds launched an ad campaign with the slogan, 鈥淢ore doctors smoke Camels than any other cigarette.鈥 They鈥檇 solicited this 鈥渇inding鈥 by giving doctors a free carton of Camel cigarettes, and then asking what brand they smoked.

1946 cigarette advertisement launched by R.J. Reynolds Tobacco Company.

By the mid-1950s, when tobacco companies had to confront good evidence that their products caused lung cancer, advertising strategies started to shift. 鈥淲hat happens is, all the different cigarette companies kind of work together to try to promote the idea that鈥e don鈥檛 know yet if it鈥檚 harmful,鈥 Gardner says. In 1954, these companies released arguing that research showing a link between cancer and smoking was alarming but not conclusive. Therefore, the companies were forming a research committee to investigate the issue.

After this, cigarette ads stopped featuring doctors because this was no longer a convincing tactic. Doctors were coming out against cigarettes, culminating in 1964 with the that smoking causes lung cancer, laryngeal cancer and chronic bronchitis.

Still, tobacco companies continued to maintain, through their research committee, that there was still a 鈥渃ontroversy鈥 over whether cigarettes were unhealthy until 1998. That year, the Tobacco Institute and the Committee for Tobacco Research (as it was then known) in accordance with a lawsuit settlement.

Soon after e-cigarettes debuted , tobacco companies began investing heavily in vaping. The Food and Drug Administration noted in 2018 that vaping was increasing at an alarming rate among teens, raising concern that more young people were becoming addicted to nicotine. In 2019, deaths and vaping-related lung illness peaked in the U.S. As of February 2020, there have been  connected to e-cigarettes and vaping products.