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How to prepare antioxidant water? 

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Our data indicate that ABA plays an important role in water stress-induced antioxidant defense against oxidative stress.
Concerning the extraction process, it is possible to conclude that the mixture of water and ethanol is the best solvent to extract substances with antioxidant activity.
Based on the two extracting methods with different antioxidative reactions, it was shown that the enzyme-assisted water extracting method was more effective for antioxidant extraction from Du-zhong leaves.
Based on the results obtained, hot water extracts were more effective in antioxidant activity, reducing power and scavenging ability on hydroxyl radicals but less effective in chelating ability on ferrous ions.
Based on these findings, it can be concluded that S. amplexicaulis and S. ringens water extracts could be considered as possible source of antioxidant and cytotoxic agents.
In conclusion, prevention of protein oxidation using a water-soluble antioxidant has a protective effect on the lipid fraction and this approach deserves further attention in complex biological systems.
from this research, the cold and hot water extracts of green tea are good antioxidant.
Both methods are very useful for determination of antioxidant capacity of water soluble phenols.
Both approaches can be attributed to its antioxidant.
The results show that the water extract of jujube (WEJ) had a significant antioxidant effect which was evaluated by DPPH, ABTS, ORAC and FRAP assays.
The finding showed that the antioxidant-rich extracts or fractions had a significant potential to be use as a natural antioxidant agent.

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What plant samples demonstrated robust antioxidant activity but limited cytotoxicity against cancer cells?
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Among the plant samples studied, Dillenia serrata demonstrated robust antioxidant activity and limited cytotoxicity against cancer cells. The ethanolic extract from D. serrata's leaves exhibited the highest antioxidant activity, followed by the root and bark extracts, with IC50 values of 95.66, 270.5, and 335.96 ppm, respectively. On the other hand, the leaf and root ethanolic extracts showed moderate cytotoxicity against MCF-7 breast cancer cells, with IC50 values of 493.17 and 229.82 μg/mL, respectively. In contrast, other plant samples like Etlingera linguiformis and Smilax ovalifolia displayed potent cytotoxic potential against breast cancer cells but did not exhibit cytotoxicity towards human PBMCs, indicating a potential for further exploration in cancer management.
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Why despite some samples have high antioxidant,flavonoid content, and phenolic content did not induce cytotoxic effects against cancer cells.?
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How can ascorbic acid used as a detector for quercetin?
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