E101 is a widely used ingredient in cosmetics, personal care, and skincare formulations. Depending on its function, it may serve as a moisturizer, preservative, emulsifier, or active ingredient to enhance the overall effectiveness and performance of a product.
E101 may refer to:
- Riboflavin, food additive which has been assigned E number 101
- Flavin mononucleotide, biomolecule produced from riboflavin
- European route E101, autoroad of International E-road network between Kyiv and Moscow
- E101, a form for stating applicable legislation within the European Economic Area and Switzerland