16.While carotenoids are present in most green plants, they only become visible each fall when chlorophyll gets broken down to save energy for the winter.
17.There are over 1,100 types of carotenoids, pigments which absorb high energy blue and green light, while leaving behind the lower energy red and yellow light.
19.This is because carrots don't contain Vitamin A but a carotenoid called beta carotene which is a “provitamin” — a substance that can be converted into a vitamin.
20.Those on short-term organic diets do show higher levels of carotenoids, polyphenols, Vitamin C and E, LDL cholesterol, antioxidant activity, immune system markers, and ever higher semen quality.
那些短期内食用有机食品的人确实体内含有更多的卜素、多酚、维生素 C 和 E、低密度脂白胆固醇、抗氧化活性、免疫系统标记,以及更高的精液质量。