can smoking cigarettes while pregnant cause birth defects What are the complications of during pregnancy? Smoking mothers may alter the

And real-life lovebirds Natalia Dyer, 22, and Charlie Heaton, 25, kept things low-key as they were spotted arriving at Charles de Gaulle Airport in Paris, on Monday

officials have called epidemic levels

We cannot determine whether e-cigarette use preceded or followed the development of hypertension, nor can we exclude the possibility that individuals who switched to e-cigarettes were systematically healthier or more health-conscious than those who continued smoking, introducing selection bias

But the looks on their faces

While the pouches don't contain cancer-causing tobacco, Zyn is quite addictive and it has raised alarm bells among regulators who worry that it is being marketed to underage users