β-カロテン

Origin

Carotenes are naturally occurring pigments found in plants, algae, and some bacteria. E160a refers to a group of carotenoids, primarily beta-carotene, alpha-carotene, and gamma-carotene. Beta-carotene is the most abundant and well-studied. These compounds can be extracted from natural sources such as carrots, tomatoes, and green leafy vegetables. Beta-carotene can also be produced synthetically through chemical synthesis or microbial fermentation.

Usage

Carotenes are used as food colorants to impart yellow to orange hues to various food products. They are also provitamin A compounds, meaning the body can convert them into vitamin A (retinol). As such, they contribute to the nutritional value of foods. Carotenes are used in a wide range of applications, including margarine, butter, cheese, baked goods, beverages, and processed foods. They are also used in dietary supplements as a source of vitamin A.

Side Effects

Carotenes are generally considered safe for consumption. Beta-carotene has an Acceptable Daily Intake (ADI) of 0-15 mg/kg body weight established by the Joint FAO/WHO Expert Committee on Food Additives (JECFA). High doses of beta-carotene from supplements, particularly in smokers, have been linked to an increased risk of lung cancer in some studies. However, this association is not consistently observed, and the risk is primarily associated with high-dose supplements rather than dietary intake. Excessive consumption of carotene-rich foods can lead to carotenemia, a harmless condition where the skin turns yellow-orange due to the accumulation of carotene in the subcutaneous fat. This condition is reversible upon reducing carotene intake.

Regulatory Status

Carotenes (E160a) are approved for use as food additives in many countries, including the European Union (EU) and the United States. In the EU, they are subject to specific purity criteria and maximum usage levels in certain food categories. In the United States, beta-carotene is Generally Recognized As Safe (GRAS) for use as a food color additive. The European Food Safety Authority (EFSA) has re-evaluated the safety of carotenes and concluded that their use as food additives is safe at the permitted levels.