A couple of years ago, I visited a dermatologist who told me the opposite of what I expected to hear: I was using too many skincare products. The 15-step routines of the 2010s can actually damage something called your skin barrier, which keeps moisture and oils where they should be, I was told. It seems Dr Karan Rajan, who’s known for sharing his medical know-how on TikTok, agrees. In a recent video, the doctor said: “you don’t need a complex skincare routine for good skin health.”How can I tell if I’ve gone too far?If you’re unsure whether your nighttime routine is a little much, Dr Rajan says “a simple routine is usually the best for skin health and function.” Your skin, which is a part of your immune system, “is alive with numerous living organisms,” Dr Rajan says. And while that might sound unpleasant, they play a crucial role in keeping you healthy. “You could run the risk of disturbing your skin barrier and disrupting your skin microbiome” if yo