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In vitro, in the hemocytes of the marine mussel Mytilus hemocytes, suspension of TiO2 NPs (Degussa P25, 10 μg/ml) stimulated immune and inflammatory responses, such as lysozyme release, oxidative burst and nitric oxide production. Vevers and Jha demonstrated the intrinsic genotoxic and cytotoxic potential of TiO2 NPs on a fish-cell line derived from rainbow-trout gonadal tissue (RTG-2 cells) after 24 h of exposure to 50 μg/ml. Reeves et al. demonstrated a significant increase in the level of oxidative DNA damage in goldfish cells, and suggested that damage could not repaired by DNA repair mechanisms. Another suggestion from the mentioned study was that hydroxyl radicals are generated also in the absence of UV light. It has been shown that fish cells are generally more susceptible to toxic/oxidative injury than mammalian cells.

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Another important application of colloidal silicon dioxide is in the production of cosmetics and personal care products. It is used as a thickening agent in creams, lotions, and sunscreens. Colloidal silicon dioxide can also improve the texture and stability of emulsions, making it a valuable ingredient in skincare formulations Colloidal silicon dioxide can also improve the texture and stability of emulsions, making it a valuable ingredient in skincare formulationswholesale Colloidal silicon dioxide can also improve the texture and stability of emulsions, making it a valuable ingredient in skincare formulations Colloidal silicon dioxide can also improve the texture and stability of emulsions, making it a valuable ingredient in skincare formulationswholesalewholesale colloidal silicon dioxide.

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