E120 is fluid from beetles mixed with other substances (e.g. tin) to make it more colour-fast. https://www.europarl.europa.eu/doceo/document/E-7-201.. E904 is shellac resin secreted by the female lac bug. Commonly used in confectionery products as a glazing agent and to reduce moisture loss in fruit. Shellac is also used as a natural primer, high gloss varnish and wood finish! https://world.openfoodfacts.org/additive/en:e904-shel.. Know your E numbers! Here is what E120 can do to you. It's highly recommended to avoid giving to children. Check labels on things before buying. https://healthknight.com/carmine-e120-side-effects-be.. And here is what E904 can do to you https://healthknight.com/shellac-e904-side-effects-be..