NUTRITION
You know her. That friend who swore off sugar and insists her skin has never looked better. But before you roll your eyes and reach for the retinol, know this: what you put in your mouth can show up on your face, according to research. And it's this very science that's fuelling a proliferation of companies offering food-sensitivity tests and personalised diet plans that pledge to leave your skin smooth and blemish-free.
These tests rely on a small blood sample, sometimes self-collected, that companies claim can be used to assess your reactivity to certain foods, leaving you with a laundry list of items to slash from your diet immediately. The promise? Banishing them
