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French researchers studied how and where E171 nanoparticles enter the bloodstream, first studying the route through pigs and then in vitro with human buccal cells, for a 2023 study published in the journal Nanotoxicology. The research showed that the nanoparticles absorbed quickly through the mouth and then into the bloodstream, before damaging DNA and hindering cell regeneration.

The RGB LED panel was built ad hoc for this purpose. Measures: 23.5 × 16.5 cm. Light Intensity: 19,500.10 lux. (43.33 W in 0.2 m²) when set to solar simulation. It does not produce temperature increases in the surroundings.

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