Ever wondered what Elle MacPherson's secret to not looking like 51 when you're 51? Urine test. That's right. She told The London Evening Standard she carries one in her purse at all times.

When asked by The London Evening Standard what's the most shocking item in her purse, she shared: "A pH balance urine tester kit to check that I'm in an alkaline state," said the mother of two. "I believe that most ailments come from having an acidic body."

Another insider secret to keeping her 6-foot frame in impeccable shape is draining her lymph nodes, which reportedly can flush toxins from the body and provide other benefits.

In fact, it's the first thing she does whenever returning to London. "[I] visit my nutritionist Dr. Simone Laubscher on Harley Street and Shirley and Dr. Sebagh's clinic for lymphatic drainage," shared the Australian-born model, who also says vacations are key for her well-being.