Scarlett Johansson has a full pout and so does Angelina JolieUnilever researcher David Gunn has identified women who look young for their age as having full lips. Genetically determined, lips mature at their fullest in young adulthood. They are also easy to measure.

Even with a few wrinkles or grey hairs, a ‘plump pout’ can take years off a woman, according to Gunn, who studied over 250 women, many twins.

By the time women reach age 60, there are wide variations in lip volume. The pink part of the thinnest lips measured just 3mm from the top of the upper lip to the bottom of the lower lip, while the fullest lips among the over-sixties measured 2.2cm.

Researcher David Gunn said: “When we identified people who looked young for their age, we were struck by the difference in their lips. via BBC News