Sweat can be as helpful as blood in checking on health. Doctors already use it for drug tests and insights on diseases like cystic fibrosis. But sweat has its limits – largely because there’s only so ...

The test measures chloride levels in sweat. High levels indicate a possible diagnosis of CF. Chloride is an electrolyte essential for maintaining fluid balance and crucial for regulating salt and ...

Twenty-six kilometres into this year’s London Marathon, I had to stop to be sick on the sidelines. I’ll spare the unpleasant details, but let’s just say it resulted in a very long (and tearful) ...