Hydrogen

Hydrogen is the lightest and most abundant element in the universe. As a food additive, it is approved in the EU for use as an inert packaging gas in modified atmosphere packaging (MAP) applications. Its food use is specialised and uncommon compared with nitrogen (E941) or argon (E938); it has been used in certain MAP systems and has attracted research interest in recent years in the context of hydrogen-enriched water and beverages, where small amounts of dissolved molecular hydrogen are proposed to have antioxidant properties, though the evidence for health effects in food contexts remains preliminary and regulatory approval for health claims is limited.

No JECFA numerical ADI applies to hydrogen as a food additive. Molecular hydrogen is chemically inert under food conditions and is not metabolised to toxic products; small amounts are naturally produced by intestinal bacteria during fermentation of dietary carbohydrates and are exhaled in breath. At concentrations used in packaging applications, it presents no consumer safety concern.

Hydrogen is approved in the EU as E949 for use as a packaging and processing gas. Its flammability (hydrogen is explosive in mixtures with air above certain concentrations) means it requires careful handling in industrial food packaging operations, but this is an occupational safety consideration rather than a consumer concern — the residual hydrogen in sealed packaging is at negligible concentrations. For consumers, the presence of E949 on packaging information signals only that a modified atmosphere packaging process has been used, with no implications for the safety or quality of the food itself.