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Blue flowers are rare in nature, [citation needed] and despite many attempts, blue roses, carnations and chrysanthemums in particular cannot not be produced by conventional breeding techniques. Blue colour in flower petals is caused by delphinidin, a type of anthocyanin, which are a class of flavonoids. [1]
The U.S. Food and Drug Administration has officially banned the use of r ed dye No.3 after the knowledge that it can cause cancer in animals — a discovery found more than 30 years ago.
Dianthus caryophyllus (/ d aɪ ˈ æ n θ ə s ˌ k ɛər i ə ˈ f ɪ l ə s / dy-AN-thəs KAIR-ee-ə-FIL-əs), [1] [2] commonly known as carnation or clove pink, is a species of Dianthus native to the Mediterranean region. Its exact natural range is uncertain due to extensive cultivation over the last 2,000 years.
Anthocyanin extracts are not specifically listed among approved color additives for foods in the United States; however, grape juice, red grape skin and many fruit and vegetable juices, which are approved for use as colorants, are rich in naturally occurring anthocyanins. [46]
Some substances cause cancer primarily through their physical, rather than chemical, effects on cells. [32] A prominent example of this is prolonged exposure to asbestos, naturally occurring mineral fibers which are a major cause of mesothelioma, which is a cancer of the serous membrane, usually the serous membrane surrounding the lungs. [32]
Extracts from Camptotheca (the "happy tree" or "cancer tree") were used to develop the chemotherapeutic drug Topotecan. Plant sources of anti-cancer agents are plants, the derivatives of which have been shown to be usable for the treatment or prevention of cancer in humans. [1] [2]
Conclusive studies have determined that high exposure to PFOA is correlated to illnesses including kidney cancer, testicular cancer and ulcerative colitis, among other serious ailments.
Betanin is commercially used as a natural food dye. It can cause beeturia (red urine) and red feces in some people who are unable to break it down. The interest of the food industry in betalains has grown since they were identified by in vitro methods as antioxidants , [ 21 ] which may protect against oxidation of low-density lipoproteins .