Delta-tocopherol

Delta-tocopherol is a minor vitamin E isomer with the least potent vitamin activity of the tocopherol family, but significant antioxidant efficacy — particularly in preventing oil oxidation at elevated temperatures. Found in soybean and sunflower oils, it is used as a food antioxidant in fats, oils, and fat-containing products, most often as part of a mixed tocopherol preparation (E306).

JECFA's ADI is "not specified," evaluated in 1981. Delta-tocopherol is a natural dietary constituent metabolised through normal vitamin E pathways. No toxicological concerns have been identified at any food additive dose. Its vitamin E potency is substantially lower than alpha-tocopherol, but its antioxidant function in the food matrix is effective at low concentrations.

Delta-tocopherol is approved in the EU, US (GRAS), UK, and globally. It is present naturally in many vegetable oils and is added as part of natural tocopherol antioxidant blends. Like other tocopherols, it represents one of the safest food antioxidant options — a naturally occurring compound with an established metabolic pathway. There are no known safety concerns at food additive concentrations.