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A new study from University of California San Francisco researchers found evidence that e-cigarettes and marijuana have harmful effects on the heart that are similar to negative effects from traditional tobacco cigarettes.

Nicotine vapes and cannabis products have become popular in recent years because the public perceives them as being less harmful than smoking, researchers explained. But the new findings shed light on health risks from these seemingly “safer” substances. “We found that cigarettes, e-cigarettes, and marijuana greatly interfere with the electrical activity, structure, and neural regulation of the heart,” lead author Dr. Huiliang Qiu, [...]