Xanthophylls
Xanthophylls
Xanthophylls (pronounced: zan-tho-fills) are a class of oxygen-containing carotenoid pigments, important for the photosynthetic process in plants and some bacteria. The term is derived from the Greek words "xanthos" (yellow) and "phyllon" (leaf).
Etymology
The term "Xanthophyll" originates from the Greek words "xanthos" meaning "yellow" and "phyllon" meaning "leaf". This is due to the yellow pigmentation that Xanthophylls provide to the leaves of plants.
Function
Xanthophylls are involved in the process of photosynthesis, where they help to absorb light energy and protect the plant cells from the harmful effects of excessive light. They are also responsible for the yellow, orange, and brown colors of many plants, especially in the autumn.
Types of Xanthophylls
There are several types of xanthophylls, including lutein, zeaxanthin, and astaxanthin. These compounds are known for their antioxidant properties and their role in human health, particularly in eye health.
Lutein
Lutein is a type of xanthophyll that is found in high concentrations in green leafy vegetables and egg yolks. It is known for its role in maintaining eye health and preventing age-related macular degeneration.
Zeaxanthin
Zeaxanthin is another type of xanthophyll that is found in high concentrations in corn, orange peppers, and oranges. Like lutein, it is also known for its role in maintaining eye health and preventing age-related macular degeneration.
Astaxanthin
Astaxanthin is a type of xanthophyll that is found in certain types of algae and seafood such as salmon and shrimp. It is known for its powerful antioxidant properties and its potential benefits for heart health and skin health.
Related Terms
- Carotenoids: A class of pigments that includes xanthophylls and carotenes. They are responsible for the red, orange, and yellow colors of many fruits and vegetables.
- Photosynthesis: The process by which green plants and some other organisms use sunlight to synthesize foods with the aid of chlorophyll pigments.
- Antioxidants: Substances that can prevent or slow damage to cells caused by free radicals, unstable molecules that the body produces as a reaction to environmental and other pressures.
External links
- Medical encyclopedia article on Xanthophylls
- Wikipedia's article - Xanthophylls
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