No, and I’m not going to, either. These pens are devices that shoot a blob of hyaluronic acid gel – the sort you get in an injectable filler – into the skin by using air pressure rather than needles. That means they’re a ‘no-needle’ treatment, but they’re also alarmingly imprecise, not least because they are usually used by people who don’t have the skills or training to use injectable fillers. Also, whatever the makers say about the filler from these devices not being able to cause complications by blocking blood vessels, this absolutely can and does happen. So just steer clear of these devices.