Is smoking hookah pens that do not contain tobacco, and which are widespread among youth, permissible or forbidden?

E-shisha and e-cigarettes have become widespread, with claims that they are a healthy alternative. However, it has been medically proven otherwise, and that they have a negative impact on the lungs and brain. They rely on a battery and a capsule containing nicotine and other substances, and are not a healthy alternative. World health organizations have fought against them. They are very expensive, and even the types claimed to be nicotine-free have been proven to contain nicotine, carcinogens, and toxic substances. A study mentioned that mint-flavored cigarettes may increase the risk of strokes. In conclusion: E-cigarettes should be treated like traditional cigarettes, and are not a means to quit smoking. Their harm outweighs any claimed benefits. If their harm is proven to be similar to or greater than regular cigarettes, then there is no difference in the ruling of prohibition. However, if they rely only on natural flavors and are not harmful: their use is not forbidden.