Tea polyphenols: extraction techniques and its potency as a nutraceutical

Abstract

Usually, polyphenols help address numerous health issues caused by oxidative stress. Tea is a popular beverage (rich in polyphenols) with abundant health promoting and disease prevention with great health-promoting and disease-prevention attributes, originating from the delicate, dried leaves of the Camellia sinensis plant. Tea has been proven to have health-boosting impacts like anti-inflammatory, anti-cancerous, anti-diabetic, and aids in weight loss. Cognitive impairment, also known as cognitive decline caused by aging or other neurological disorders, has become an emerging health concern. Tea polyphenols, especially phenolic acids, havegained enormous attention due to their link to improved cognitive function by preventing cognitive decline. This review summarizes recent studies on the health benefits of polyphenols in tea. Additionally, effective traditional and modern techniques to extract polyphenols and their effects on various diseases have been described.

From Plants to Psycho-Neurology: Unravelling the Therapeutic Benefits of Bioactive Compounds in Brain Disorders

“…The tea plant ( Camelia sinensis (L.) Kuntze) contains an abundance of bioactive compounds with antidepressant properties [ 21 ]. Horia et al [ 22 ] demonstrated that many different tea-derived polyphenols, namely flavan-3-ols (catechin, gallocatechin, epicatechin), flavonols (kaempferol, quercetin), and phenolic acids (gallic and chlorogenic acid), presented anti-inflammatory activity via down-regulation of nuclear factor kappa-light-chain-enhancer of activated B cells’ (NF-κB) signalling pathway and antioxidant activity, which can be vital to reduce the risk of depression [ 21 , 22 ]. An important preclinical study demonstrated a significant improvement in memory and cognition in animal models of neurodegenerative diseases.…”

“…An important preclinical study demonstrated a significant improvement in memory and cognition in animal models of neurodegenerative diseases. Phenolic consumption has been associated with increased cognitive function, and their administration may prevent cognitive decline [ 22 ].…”

Modeling of polyphenols extraction process from green tea and the effect of temperature on the process

“…Green tea has gained widespread popularity due to its numerous health benefits attributed to the presence of polyphenols, which are known for their antioxidant and anti-inflammatory properties [1,2,3,4] Shaukat et al, 2023]. The extraction process of polyphenols from green tea is a complex phenomenon influenced by various factors, including temperature, time, solvent composition, and particle size [5] Bindes et al, 2019].…”