Researchers from Finland, Sweden, and Denmark do the most trials per million inhabitants. Dressing up on Hallowe'en night may be fun, but it's hard to see where you are going with a cardboard pumpkin on your head. Less serious reported hazards include eye injuries from flying missiles, particularly eggs, and flatus from gummy bears. Their cohort study in people over 70 years found that mortality was similar to previously published rates in younger people, and that many comorbid conditions including diabetes and heart diseases had no impact on mortality. About half of them take some sort of supplement.
Users eat less fat and more fruit and vegetables than non-users.
When it blows up, the tube is kinked. When it goes down, forward flow is restored. A link between Helicobacter pylori and sudden infant death was first postulated three years ago, and evidence has been accumulating slowly ever since. Experiments in rats suggest two possible causal mechanisms, but it will be extremely difficult to study either of them in humans. The association between smoking and depression is established, but it's still unclear whether depression leads to smoking or smoking leads to depression.