Applications of Tea (Camellia sinensis) and Its Active Constituents in Cosmetics

Abstract

Studies on the cosmetic applications of plant extracts are increasingly appearing in the scientific literature, which is due to the growing popularity of skincare products around the world. In the light of the observed changes, a return to natural treatment and skincare with cosmetics free of harmful substances or toxic preservatives is visible. Currently, tea extracts, due to their rich composition and various biological actions, play an important role among the dietary supplements and cosmetics. This review is intended to collect the reports on the properties of the tea plant, its extracts and preparations in cosmetology: for skin care products and for the treatment of selected dermatological diseases. Particular attention is paid to its antioxidant, anti-hyaluronidase, anti-inflammatory, slimming, hair-strengthening, photoprotective and sealing blood vessels properties.

Positive Effect of Cannabis sativa L. Herb Extracts on Skin Cells and Assessment of Cannabinoid-Based Hydrogels Properties

“…Oxidative stress is one of factors inducing skin aging processes and inhibiting its regeneration ability [ 7 ]. Long-term oxidative stress in skin cells (occurring e.g., after prolonged skin exposure to the sun, as well as due to many external factors, e.g., smog) may leads to DNA, protein and lipid damage, disrupting many natural processes, including degradation and synthesis of collagen and elastin-basic proteins that play the most important role in a skin aging process, regeneration or wound healing [ 24 , 25 , 26 ]. Chlorophyll may also enhance the antioxidant effect [ 6 , 24 ].…”

“…As shown in previous studies [ 27 , 28 , 29 , 30 , 31 , 32 ], the total content of phenols per 1 g of dried plant or dry extract is about 0.09–0.56 mg in hemp leaves, 4.7–8.1 mg in flowers, 0.77–51.6 mg in seeds and 10.51–52.58 mg in inflorescences. In the research of Maqsood et al [ 26 ] the influence of different solvents on the concentration of antioxidants in cannabis leaf extracts was compared. It was shown that the highest content of phenols was characterized in aqueous and methanolic extracts, while extracts obtained using organic solvents did not show the content of phenols.…”

Ziziphus spina‐christi (L.) fortified with Camellia sinensis mediates apoptosis, Notch‐1 signaling, and mitigates obesity‐induced non‐alcoholic fatty liver

“…Catechins are considered the prominent flavonoids in GT which gained attention for their use in various diseases due to their antiaging, anticancer (Beltz et al, 2008), antiparkinsonism, antistroke, antidiarrheal, antidiabetic (Subramani & Natesh, 2003), anticaries and antibacterial (Hamilton‐Miller, 2001), antifibrotic, anti‐inflammatory, antioxidative (Singh et al., 2011), and antiatherosclerotic activities (Hussain et al., 2017). Catechin derivatives (flavonoids), including epicatechin, epigallocatechin, epicatechin gallate, and epigallocatechin gallate, showed the most potent anti‐inflammatory and anticancer activities (Koch et al., 2019). Owing to the various health‐promoting properties of catechins, it is recommended that products containing catechins be included in the daily diet (Musial et al., 2020; Singh et al., 2011).…”

Therapeutic Promises of Medicinal Plants in Bangladesh and Their Bioactive Compounds against Ulcers and Inflammatory Diseases

“…C. sinensis of the Theaceae family is locally termed as ‘cha’ in Bangladesh and as ‘black tea’ worldwide [ 146 ]. The leaves, stems, and twigs contain different active constituents like flavonoids (e.g., thearubigins, theaflavins, and catechins), vitamins amino acids, β-carotene, chlorogenic acids, volatile compounds carbohydrates, phenolic acids (e.g., gallic acid, caffeic acid, and cauramic acid), proteins, lipids, and fluoride [ 147 , 148 ]. These components help in the treatment of different diseases with their different protective properties [ 146 ].…”