Citranaxanthin is a carotenoid compound found in citrus fruits, especially in oranges. It is known for its antioxidant properties and has been studied for its potential benefits to human health. There are several synonyms for citranaxanthin, including E161h, Citral, Citrus Xanthophyll, and Methylviolaxanthin. E161h is a code used by the European Union for food additives, including citranaxanthin, which has been approved for use in food and beverage industry as a natural colorant. Citrus Xanthophyll is a broader term that includes other carotenoid compounds found in citrus fruits. Methylviolaxanthin is a derivative of citranaxanthin, which contains a methyl group and is found in trace amounts in certain citrus varieties.