Common bacteria may be able to help mass-produce a natural UV-protectant ingredient called gadusol that is found in many fish and marine organisms. The chemical could be used to make sunscreen safer and greener in the future.
Gadusol could potentially be produced using E. coli, according to a study published in the journal Trends in Biotechnology. The compound helps protect against ultraviolet damage, but it is “scarce in nature, and extracting it is inefficient and can carry environmental costs,” Ping Zhang, a biochemist at Jiangnan University in China and lead author of the study, said in a press release.
Gadusol is “transparent, unlike melanin, and yet is perfectly tuned to block out harmful UV rays from the sun, which makes it ideal for organisms hiding from prey,” said New Scientist. Instead of harvesting the compound directly from fish, researchers opted to turn the bacteria E. coli into “mini chemical factories,” said Popular Science.
There is heightened interest in finding natural sunscreens amid a growing backlash against conventional sunscreen ingredients, “which can irritate sensitive skin, harm marine organisms or rely on petrochemicals,” said the press release. Gadusol is promising not only for its sun protection but also because of its “antioxidant activity comparable to that of vitamin C, suggesting it may help neutralize cell-damaging free radicals from UV exposure.”
Despite the compound’s promise, much more testing is needed to determine its efficacy and safety compared to other currently available sunscreens. Gadusol “won’t join your next beach day just yet,” said Popular Science.
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