Polyphenols in Nature

Phenolic compounds are a broad class of secondary metabolites found in many higher plant organs, includingfruits, vegetables, grains, legumes, nuts, and spices. They are also involved in a variety of physiologicalprocesses, including stress resistance, plant quality, color, and flavor. The anti-inflammatory,anticarcinogenic, antibacterial, and natural antioxidant properties of phenolic compounds are currently afocus of much research and application. Several types of phenolic compounds share a common chemicalstructure consisting of an aromatic ring with one or more hydroxyl substituents. Flavonoids, phenolic acids,tannins, stilbenes, and lignans are the primary families of phenolic compounds. The SLE, SFE, UAE, MAE,ESE, and PLE are examples of advanced extraction techniques. While non-conventional technologies canprovide greater extraction efficiency in terms of cost, yield, extraction time, and/or selectivity, conventionalextraction methods are relatively straightforward and frequently employed for separating plant phenolicchemicals. HPLC is one of the most advantageous analytical techniques, particularly when used inconjunction with extremely sensitive detectors (like MS). All things considered, the scientific community isstill very interested in the biological potential of several naturally occurring plant phenolic chemicals. Despiteall of those developments, there is still a significant lack of information regarding the phytochemicals thatare responsible for the biological potential, their modes of action, how to build therapeutic and preventativedosages, and even whether biochemical interactions occur.