Nicotine alone can reduce hunger, even though smoking is bad because of other chemicals.

This study found that nicotine alone (without smoking) makes people feel less hungry and more full, which supports the idea that nicotine itself, not just smoke, suppresses appetite.

The study found that activating certain brain cells that respond to nicotine reduces eating and leads to weight loss by sending signals to the part of the brain that tells you you're full—so nicotine likely works the same way, even without the other stuff in cigarettes.

This study found that nicotine, when given with a weight-loss drug, makes mice eat less by activating brain areas that tell them they’re full—without using any tobacco chemicals.

This study shows that nicotine, on its own, tricks the brain’s hunger center into feeling full, even without the other chemicals in cigarettes. That’s exactly what the claim says.