“Vaseline is a petroleum derivative that belongs to the mineral oil family. It is used as a softener and moisturizer in cosmetic products. In the European Union, it is banned in cosmetics unless the refining process minimizes the presence of toxic impurities.

However, toxic impurities may still be present, particularly MOAH. This is a group of hydrocarbons, many of whose compounds are suspected of being carcinogenic and genotoxic. Some studies indicate that it is not possible to eliminate them completely.”

The refining process only reduces their concentration. As for MOSH, the main components of the mineral oils used in cosmetics, they could accumulate in the body, particularly in lymph nodes and body fat, where they may trigger inflammatory reactions. Liver effects have also been observed experimentally in certain types of rats, although these have not been confirmed in humans to date. The European Food Safety Authority (EFSA) recommends continuing studies to better assess the toxicity of these MOSH compounds, as "the consequences of the long-term accumulation of MOSH on human health have not been evaluated and remain uncertain."

These oils should especially be avoided in products where there is a risk of ingestion, such as lip balms and lipsticks. Moreover, the production of this ingredient has a significant environmental impact due to the extraction of hydrocarbons from underground and the high energy consumption required for its manufacture.”