Riboflavin (vitamin B2) sensitized photooxidation of ascorbic acid (vitamin C): A kinetic study

Noreen, Aisha; Anwar, Zubair; Ahsan Ejaz, Muhammad; Usmani, Muneeba; Khan, Tooba; Ali Sheraz, Muhammad; Ahmed, Sofia; Mirza, Tania; Khurshid, Adeela; Ahmad, Iqbal

doi:10.1016/j.saa.2023.123813

Cited by 2 publications

(1 citation statement)

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“…The findings indicated that after photostability tests conducted with fruit juices and jellies packaged in both polyethylene terephthalate and glass bottles or flasks, L-ascorbic acid was undetectable, suggesting that the packaging failed to offer effective protection against vitamin C photodegradation. Noreen et al [15] examined the photoxidation of ascorbic acid sensitized by riboflavin across a pH range of 2.0 to 12.0, under ambient air and anaerobic conditions, employing UV and visible irradiation sources. The degradation kinetics of ascorbyl anion in aqueous solutions, in the presence of riboflavin, followed first-order kinetics for its photodegradation.…”

Section: Introductionmentioning

confidence: 99%

Mineral Water as a Sustainable Raw Material for Skincare Products and Protective Natural Antioxidant from Solar Irradiation: Stability of Vitamin C and In Vitro Antioxidant Assessments

Bognár,

Šojić Merkulov,

Finčur

et al. 2024

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Oxygen is crucial for life, but its reactive species, like free radicals, can damage health and accelerate aging. Antioxidants from natural and synthetic sources mitigate these effects. Kanjiža Spa’s mineral-rich thermal water is renowned for its therapeutic benefits and potential in eco-friendly pharmaceuticals and cosmetics. Hence, the utilization of mineral water in pharmaceutical and cosmetic applications when exposed to artificially generated free radicals under simulated solar irradiation and different experimental conditions (pH values and mineral concentrations in the thermal water) was researched. Three different dermocosmetic products designed with raw minerals and water from Kanjiža Spa were tested. Our findings confirmed the protective effect of mineral water, as evidenced by the higher stability of vitamin C in thermal water. The degradation of vitamin C was significantly reduced in the presence of mineral water, with the least degradation occurring at pH = 7, which closely matches human skin pH. These results were further validated using 2,2-diphenyl-1-picrylhydrazyl and ABTS tests. Overall, the obtained results underscore the therapeutic and commercial potential of Kanjiža Spa’s mineral water, suggesting that it could be a valuable ingredient in next-generation skincare and pharmaceutical products.

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Section: Introductionmentioning

confidence: 99%