Pure luteolin powder and bulk lutein are both naturally occurring plant compounds. They are widely distributed in various plants and foods, and both have biological activity and play an important role in human health. However, there are obvious differences between the two in terms of chemical structure, biological function, metabolic process and application field. This article will explain in detail the similarities and differences between luteolin and lutein.
Chemical Structures
Although luteolin and lutein have similar names, they are different in chemical structure. They both belong to flavonoids, but have different molecular structures.
1. Luteolin
Luteolin is a flavonoid compound. The chemical formula is C15H10O6. Its molecular structure consists of a benzene ring (aromatic ring) and a dihydropyrone structure. It carries multiple phenolic hydroxyl groups (-OH). Luteolin has strong antioxidant properties and plays a role in multiple physiological functions.
2. Lutein
Lutein is a carotenoid with a chemical formula of C40H56O2. The structure of lutein contains a long chain of conjugated double bonds. It has a strong ability to absorb ultraviolet and blue light. The multiple isoprene units in the structure of lutein give it spectral properties similar to those of vitamin A.
Physical properties
Although both luteolin and lutein are natural compounds from plants, their physical properties differ significantly in some aspects. The following will compare them in terms of solubility, color, stability and thermal sensitivity.
1. Solubility
(1) Solubility of luteolin
Pure luteolin powder is a flavonoid compound with strong polarity, especially in the phenolic hydroxyl (-OH) part of its molecule. Luteolin has a high solubility in polar solvents. Generally, luteolin has poor solubility in water, but can be dissolved in the following solvents: organic solvents and alcohol solvents.
The low solubility of luteolin in water limits its effectiveness in some applications. However, its high solubility in organic solvents makes it common in pharmaceutical preparations and health products.
(2) Solubility of lutein
Lutein is a type of carotenoid and is a fat-soluble substance. Lutein has a low solubility in polar solvents, but has good solubility in non-polar solvents and fatty solvents. It is widely used in lipid foods and health products, especially in oil-based supplements.
2. Color
(1) Color of luteolin
Luteolin usually appears as yellow or orange-yellow crystals or powders. This color comes from the aromatic rings and conjugated double bond systems in its molecules. When luteolin is exposed to air, its color may change. Especially when exposed to light for a long time, it may cause color changes.
(2) Color of lutein
Bulk lutein is a typical yellow carotenoid, showing a bright yellow or orange-yellow color. Due to its strong conjugated double bond system, it has a brighter color and strong light absorption ability. Lutein is often used as a food additive. Especially when it provides a yellow or golden color to food.
3. Stability
(1) Luteolin stability
Luteolin bulk powder may degrade to a certain extent when exposed to ultraviolet light, air, and high temperatures. Due to the benzene ring and phenolic hydroxyl group in its chemical structure, luteolin may undergo chemical changes in strong acid or strong base environments, resulting in a decrease in its stability. In addition, luteolin's sensitivity to light also limits its stability during long-term storage.
(2) Lutein stability
Lutein may also degrade under long-term light exposure, oxygen exposure and high temperatures. In particular, ultraviolet light can destroy its molecular structure. Lutein has relatively poor stability. Especially when in liquid form or exposed to air. To improve its stability, lutein usually needs to be stored under conditions that avoid strong light and high temperatures.
4. Heat sensitivity
(1) Luteolin heat sensitivity
Pure luteolin powder has relatively good thermal stability. However, under high-temperature conditions (such as above 100°C), its antioxidant effect may be weakened. Long-term high-temperature treatment may cause structural damage to luteolin. Therefore, long-term high-temperature exposure should be avoided during the heating process.
(1) Thermosensitivity of lutein
Lutein is a highly heat-sensitive compound. High-temperature treatment and cooking processes (such as frying and boiling) will lead to the degradation of lutein. Studies have shown that lutein is easily destroyed at high temperatures. Therefore, during food processing, the thermal stability of lutein is poor, and temperature control should be paid attention to.
Sources:
•Luteolin
Luteolin is a flavonoid compound that is widely found in many plants. Especially in foods rich in flavonoids. It mainly enters the human body through food and has a wide range of biological activities. Guanjie Biotech is a bulk luteolin supplier that provides luteolin derived from Rutin. Rutin is a common flavonoid compound in plants. Its structure is similar to that of luteolin. Therefore, it can extract high-quality luteolin. Rutin itself is widely distributed in some plants and is an important source of luteolin. Such as citrus and some medicinal plants.
•Lutein
lutein is a carotenoid that is widely found in green vegetables and some fruits and vegetables. It is one of the important components of human eye health, helping to filter harmful blue light and protect the retina. Guanjie Biotech is a bulk lutein supplier, that provides lutein from marigold. Marigold is rich in lutein and is currently the main plant source for industrial extraction of marigold extract powder lutein.
Safety
Luteolin and lutein are both natural plant extracts and have high safety within a reasonable dosage range.
•Luteolin
Pure luteolin powder is widely found in foods such as celery and citrus fruits, and no obvious toxicity has been found in long-term consumption. Animal studies have shown that high doses (>2000 mg/kg body weight) do not cause acute toxicity. Chronic toxicity experiments also did not find carcinogenicity or genotoxicity. At normal intake (50-500 mg/day), the human body can usually tolerate it, but extremely high doses may cause gastrointestinal discomfort or allergic reactions.
•Lutein
Studies have shown that long-term consumption of lutein powder bulk is safe and reliable, and a daily intake of 6-20 mg is beneficial to eye health. Toxicology studies have not found it to have obvious side effects. However, excessive intake (>40 mg/day) may cause slight yellowing of the skin, which can return to normal after reduction.
Although luteolin and bulk lutein have similar names, they have significant differences in chemical structure, biological function and application. As a luteolin and lutein supplier, Guanjie Biotech ensures high purity and safety of products in compliance with food and healthcare industry standards. Our products face the company. If you are interested in our products, please contact us at info@gybiotech.com.
