What is Lutein?

Lutein, also known as lutein, is widely found in vegetables, fruits, flowers and other plants. Its chemical formula contains two ionone rings. It is a carotenoid with vitamin A activity. The main pigment in the macular region of the human eye ^[1] .

Humans and other mammals cannot synthesize lutein by themselves, and foreign food is the only source of lutein intake. The zeaxanthin and lutein content in egg yolk is the highest, accounting for 85% of the total carotene, and the lutein content in corn is also very high, accounting for 60% of the total carotene in corn. ^[3]

According to the various functions of lutein, the following types of applicable people can be listed. It is also necessary to pay attention to the appropriate amount of lutein and eat it with other nutrients.

1. Specific staff: need to work in the midday sun (

Lutein high performance liquid chromatography

High performance liquid chromatography is a sensitive, efficient, and fast separation method that can accurately detect the content of various components in its samples. It is the most widely used detection method for quantitative analysis of lutein method. This method has high accuracy and good stability, and can efficiently and quickly detect the content of lutein in the sample ^[1] .

Lutein colorimetry

Colorimetry is based on Lambert-Beer law. A common method is ultraviolet-visible spectrophotometry, which performs accurate analysis according to the concentration of the measured substance and the absorbance, which is a simple, fast and low-cost detection method. This method cannot analyze the different isomers of lutein, has poor sensitivity, and is susceptible to interference. These are the outstanding shortcomings of ultraviolet-visible spectrophotometry, which have severely restricted its application and development ^[1] .