Profiled tea extracts exemplifying the importance of characterizing food bioactives: opinion piece

Li, Shiming; Gosslau, Alexander; Lange, Klaus; Ho, Chi‐Tang

doi:10.31665/jfb.2019.5172

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…Sri Lankan herbal teas are conventionally used as an alternative to regular tea (Camellia sinensis) and are popular among health-conscious consumers. In recent years, herbal teas have received much attention as natural health promoting products (Li et al, 2019). The type of herbal teas commonly consumed in different countries may be affected by local habits and availability of the respective plants.…”

Section: Phenolic Antioxidants Of Bael Fruit Herbal Tea and Effectsmentioning

confidence: 99%

Influence of processing on the phenolic compounds of feijoa pulp (Feijoa sellowiana)

Castelucci¹,

Toledo²,

Juliano³

et al. 2020

JFB

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Herbal teas are globally popular among health conscious consumers. In this study the phenolic content and potential antioxidant activities of bael fruit herbal tea prepared with dried immature bael fruit cuts (Aegle marmelos), traditionally used in the Asia, were determined. Phenolic compounds of the herbal extracts were identified using liquid chromatography-tandem mass spectrometry. The total phenolic content (TPC) and antioxidant activities of the tested herbal extract was determined. The amount of herbal material to be used in the tea preparation was established based on the sensory evaluation conducted with 50 untrained adult panelists. The single dose efficacy of the bael fruit herbal tea on postprandial glycemic response and plasma antioxidant capacity (PAC) of healthy adults were investigated. A randomized crossover study was carried out with 16 healthy adults who consumed 250 mL bael fruit tea with 50 g glucose challenge and the control (50 g glucose in 250 mL water) randomly within two visits. Blood samples were collected at the baseline and postprandial at 30, 45, 60, 90, and 120 min using microcapillary tubes. The plasma was analyzed for glucose concentration (PGC) and PAC. The TPC of bael fruit tea extract was 108.3 μmol gallic acid equivalents/g of extract. There was a reduction trend in mean PGC of those subjects who consumed bael fruit tea compared to the glucose added water (control) at each time point. Furthermore, the bael fruit tea significantly increased PAC at the end of 120 min post ingestion. Further research is warranted to examine the long-term efficacy of multiple dose ingestion of bael fruit herbal tea in the control and management of diseases associated with oxidative stress.

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Section: Phenolic Antioxidants Of Bael Fruit Herbal Tea and Effectsmentioning

confidence: 99%

Influence of processing on the phenolic compounds of feijoa pulp (Feijoa sellowiana)

Castelucci¹,

Toledo²,

Juliano³

et al. 2020

JFB

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“…Catechins are major flavan-3-ol found in various cocoa extracts and tea extracts, with demonstrated bioactivities for human such as cardiovascular health benefits, antioxidant activity, anti-inflammatory effect, improved skeletal muscle structure and endothelial function (Zhong et al, 2012;Chiu et al, 2018;Perera et al, 2018;Li et al, 2019;Ambigaipalan et al, 2020). Spadafranca et al (2010) studied the effect of dark chocolate on plasma epicatechin levels, DNA resistance to oxidative stress and total antioxidant activity in healthy subjects.…”

Section: Catechinsmentioning

confidence: 99%

Bioavailability and Metabolism of Food Bioactives and their Health Effects: A Review

Shahidi¹,

Ramakrishnam²,

Oh³

2019

JFB

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Numerous studies have demonstrated the availability of high-quality bioactive compounds in food along with their determination and quantification techniques. Many of these identified compounds have been claimed to possess health benefits such as anti-inflammatory, anti-cancer, antioxidant, anti-allergic, anti-fungal, antimicrobial and cardioprotective spasmolytic properties. However, mere presence of these compounds does not directly correlate with their potential health effects upon consumption. Since any food consumed does not reach the blood stream in the original form and as they are broken down to various compounds it is mandatory to consider their bioavailability and metabolism that takes place upon absorption. Furthermore, the efficacy of these bioactive compounds depends on various factors including the dosage, food matrix and stability of the compound during metabolism. Various bioavailability studies indicate that the parent bioactive compound is broken into various metabolites via oxidation, dehydroxylation, de-esterification, hydrolysis, carboxylation, α- and β-oxidation processes inside the human body. Therefore, this leads to an interesting conundrum that whether the proposed health effects are due to the parent bioactive compound or due to the metabolites formed during absorption. Some details in relation to the metabolism and metabolites of food bioactives are presented in this contribution.

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“…Green tea is a classic example of a source of galloylated catechins (Li et al, 2019). Furthermore, the presence of catechin, but not gallocatechin, has also been reported in date seed (John and Shahidi, 2019).…”

Section: Total Phenolics and Maldi-tof-ms Analysismentioning

confidence: 99%

Wood extracts as unique sources of soluble and insoluble-bound phenolics: reducing power, metal chelation and inhibition of oxidation of human LDL-cholesterol and DNA strand scission

Albishi¹,

Banoub²,

Camargo³

et al. 2019

JFB

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Palm date is an important crop in many Middle Eastern countries. In the present study, seedling date palm wood and old date palm wood were evaluated for their phenolics content. It was found that they may serve as rich source of soluble and insoluble-bound phenolics with promising reducing power and metal chelation. The observed effects were compared with those of oak, quibracho, banana, and pine woods. Syringic acid, (+)-catechin, and (+)-gallocatechin were present in five out of the six tested samples, as evaluated by MALDI-TOF-MS. Therefore, these compounds are good candidates to be monitored by the industry in order to define quality parameters. Additionally, due to their strong ability in counteracting DNA damage caused by peroxyl and hydroxyl radicals (up to 98.42%) and cupric ion-induced human low-density lipoprotein-cholesterol (LDL-c) peroxidation in vitro (up to 95.80%), wood phenolics may render antimutagenic effects and protection against cardiovascular diseases.

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Profiled tea extracts exemplifying the importance of characterizing food bioactives: opinion piece

Cited by 7 publications

References 24 publications

Influence of processing on the phenolic compounds of feijoa pulp (Feijoa sellowiana)

Influence of processing on the phenolic compounds of feijoa pulp (Feijoa sellowiana)

Bioavailability and Metabolism of Food Bioactives and their Health Effects: A Review

Wood extracts as unique sources of soluble and insoluble-bound phenolics: reducing power, metal chelation and inhibition of oxidation of human LDL-cholesterol and DNA strand scission

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