The synthetic, biomimetic melanin cream demonstrated the potential to heal damage occurring throughout the day when skin is exposed to sunlight or environmental toxins.

It mimicks the natural melanin in human skin, and can be applied topically to injured skin, where it accelerates wound healing. These effects occur both in the skin itself and systemically in the body.

A study published this week in Nature Regenerative Medicine showed that when applied in a cream, the synthetic melanin can protect skin from sun exposure and heal skin injured by sun damage or chemical burns. The technology works by scavenging free radicals, which are produced by injured skin such as a sunburn. Left unchecked, free radical activity damages cells and ultimately may result in skin aging and skin cancer.

Melanin in humans and animals provides pigmentation to the skin, eyes and hair. The substance protects your cells from sun damage with increased pigmentation whenever the sun is 'tanning'. That same pigment in your skin also naturally scavenges free radicals in response to damaging environmental pollution from industry smokestacks and car exhaust fumes.

"People don't think of their everyday life as an injury to their skin," said co-corresponding author Dr. Kurt Lu, who teaches dermatology and practices at Northwestern University School of Medicine. "If you walk barefaced every day in the sun, you suffer a low-grade, constant bombardment of ultraviolet light. This is worsened during peak mid-day hours and the summer season."