Decomposition of resveratrol when exposed to sunlight or heat. It is the result of biological and chemical mechanisms related to...

Decomposition of resveratrol when exposed to sunlight or heat. It is the result of biological and chemical mechanisms that involve changes in the structure of molecules. This affects the stability and biological activity of resveratrol. It can be explained as follows:

Biological and chemical mechanisms of resveratrol degradation.

1. Decay from light (Photodegradation)

Resveratrol is sensitive to UV light, especially in the UV-A and UV-B wavelengths.

When exposed to sunlight The resveratrol molecule absorbs energy from light. causing structural changes such as:

Changing from trans-resveratrol (which has high biological activity) to cis-resveratrol (with less power)

Breaking of bonds in an aromatic ring or double bond causing other compounds to have no effect

This breakdown usually occurs quickly when exposed to strong sunlight. or store in a translucent container

2. Thermal degradation

When heated, such as drying at temperatures above 40°C:

Bonds in the resveratrol molecule Can be broken or changed

The structure of the substance is changed to an inactive derivative.

There is also oxidation. which causes the substance to deteriorate faster

3. Oxidation reaction (Oxidation)

Resveratrol has a hydroxyl group (–OH) which is susceptible to oxidation by oxygen in the air or by plant enzymes.

Heat and light speed up this process.

The result is the formation of quinones or other oxidizing compounds. that has no antioxidant activity

Consequences

The amount of resveratrol decreases significantly when processed with light and heat, such as sun drying and drying.

Decreased biological activity, such as antioxidant capacity anti-inflammatory or inhibit cancer cells

Guidelines for treating resveratrol in plants

Avoid exposure to direct sunlight. Should be dried in the shade or dried at a low temperature.

Uses a drying process without heat & low relative humidity. to maintain the chemical structure

Store in an opaque container and at a low temperature.