How long does the volumizing effect of a zingiber officinale-based lip plumper last?

The vermilion zone of the lips (also called red lip or zone of Klein) has peculiar characteristics, different from the surrounding skin, which make it one of the most important parts of the lips. It can be considered a tactile organ, with an essential role in the body's anatomy and functions. Together with the lips, the vermilion zone represents one of the typical characteristics of mammals and its evolutionary appearance seems to be linked to the source of nutrition of these animals (especially breastfeeding), to the articulation of sounds, to their facial expression and to their sexual function. The vermilion is actually an erogenous zone, which not only generates sexual feelings when touched or stimulated, but also sends symbolic signals through the transmission of sensual and sexual information.

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