דו״ח מאומת

Kiwis are an example of fruits with excellent bioactive properties worldwide appreciated and consumed generating tons of waste. Thus, the objective of this work was to compare two varieties of kiwi: Actinidia deliciosa cv. "Hayward" (green) and Actinidia spp. (red) regarding the nutritional value of their pulps, chemical composition and bioactivities of each pulp and peel. The results revealed that pulps have a high water content and low amount of other macronutrients. Both parts of red kiwi presented the highest tocopherols content and red kiwi pulp presented the highest content in ascorbic acid. In general, the peels exhibited the highest antioxidant activity and green kiwi peels showed cytotoxicity and anti-inflammatory activity, which could be related to its higher content in phenolic compounds, especially B-type (epi)catechin dimer. Therefore, kiwi components currently underutilized may be indicated as a source of natural functionalizing ingredients with several benefits for human health.…

PMID: 31882116

Both the Green® kiwifruit (Actinidia deliciosa)and the Sungold® one (A. chinensis)stand out among other commonly consumed fruits for their nutritional composition. They are fruits exceptionally rich in vitamin C, since green kiwi fruit have twice and Sungold® have three times the same amount of the vitamin of strawberries or oranges. Kiwifruit is very rich in vitamins E, K, folates, carotenoids, potassium, fiber and other phytochemicals. Regular consumption of kiwifruit, in the context of a balanced diet, has proven to have beneficial effects on immune function and antioxidant defense; also in the gastrointestinal function, improving protein digestion and constipation; and in the upper respiratory tract, preventing infections and improving their symptoms. Finally, regular consumption of kiwifruit has been associated with improvements in mood. Most of these benefits may be due not only to the high content of vitamin C of the kiwifruit, but also to other nutrients and phytochemicals that work synergistically in the food matrix. The results of the studies suggest that the daily consumption of kiwifruit can be an effective strategy for health promotion and prevention of numerous diseases. Los kiwis, tanto la variedad verde (Green®) (Actinidia deliciosa)como la de color amarillo (Sungold®) (A. chinensis), destacan entre las frutas de consumo habitual por su composición nutricional. Son excepcionalmente ricos en vitamina C, ya que los kiwis verdes duplican la cantidad que tienen las fresas o naranjas, y el kiwi de color amarillo incluso la triplica. Además, los kiwis tienen un elevado contenido en vitaminas E, K, folatos, carotenoides, potasio, fibra y otros fitoquímicos, que proporcionan no solo beneficios nutricionales, sino también sanitarios. El consumo regular de kiwi en el contexto de una dieta equilibrada tiene efectos beneficiosos sobre la función inmune y defensa antioxidante; en la función gastrointestinal, mejorando la digestión proteica y el estreñimiento; y en el tracto respiratorio superior, ayudando en la prevención de infecciones y mejorando su sintomatología. Por último, el consumo habitual de kiwi se ha asociado a mejoras del estado de ánimo. La mayoría de estos beneficios pueden deberse al elevado contenido de vitamina C del kiwi, pero también a los otros nutrientes y fitoquímicos que actúan de forma sinérgica en la matriz alimentaria. Los resultados de los estudios realizados hasta ahora sugieren que el consumo diario de kiwi puede ser una estrategia efectiva para la promoción de la salud y prevención de numerosas enfermedades.…

PMID: 27571859

<i>Actinidia arguta</i>, also known as mini kiwi (due to its small size) or hardy kiwi (due to its frost resistance), is becoming an increasingly popular fruit alongside its commercially older siblings, i.e., <i>A. deliciosa</i> (green kiwi fruit) and <i>A. chinensis</i> (golden kiwifruit), from the <i>Actinidiaceae</i> family. This review paper discusses the biological and pharmacological properties of <i>A. arguta</i> fruits, with a special focus on methods of the bioactive component analysis. Mini kiwi is a valuable source of bioactive compounds, which contribute to its health-promoting properties, among others: antioxidant, neuroprotective, anticholinergic, antitumor, anti-inflammatory, antidiabetic, antiobesity as well as antiatherosclerotic ones. They are briefly discussed, illustrating the action of bioactive ingredients and the methods of analysis, which are presented in the tables. This review includes a concise characterization of <i>A. arguta</i> and updates the current field of knowledge about its diverse biological activities, which are undoubtedly related to the content of bioactive components and the methods used for their isolation and analysis. The information included in this review paper will be helpful in perceiving mini kiwi not only as a tasty fruit but also as a source of bioactive ingredients with beneficial, health-promoting effects on the body. Effective isolation of these components can contribute to the future development of antiaging and anticancer drugs, which undoubtedly will lead to further research and promote this species.…

PMID: 41375275

<b>Background/Objectives:</b> Growing interest in natural, health-promoting ingredients for functional foods, nutraceuticals, and cosmetics has increased the demand for bioactive compounds from kiwi (Actinidia deliciosa). This study aimed to assess the antioxidant, anti-inflammatory, and antithrombotic properties of amphiphilic bioactives extracted from kiwi fruit and its by-products, including peel, seeds, and pulp. <b>Methods:</b> Bioactive compounds were extracted and analyzed using liquid chromatography-mass spectrometry (LC-MS) and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy. Antioxidant activity was evaluated using DPPH and ABTS radical scavenging assays. Anti-inflammatory and antithrombotic effects were assessed through inhibition of platelet aggregation induced by platelet-activating factor (PAF) and adenosine diphosphate (ADP) in human platelets. <b>Results:</b> All extracts showed significant antioxidant activity. FTIR and LC-MS analyses confirmed the presence of phenolics, flavonoids, carotenoids, and polar lipids. Kiwi peel extract exhibited the strongest inhibition of PAF- and ADP-induced platelet aggregation, attributed to its higher content of phenolics and unsaturated polar lipids. LC-MS data indicated a favorable fatty acid profile with high omega-9 levels and a low omega-6/omega-3 ratio. Polar lipid structural analysis revealed a predominance of phospholipids with unsaturated fatty acids at the sn-2 position. <b>Conclusions:</b> Kiwi by-products are valuable sources of health-promoting bioactives with antioxidant and anti-inflammatory potential. These findings support their incorporation into nutraceutical, nutricosmetic, and cosmeceutical products and lay the groundwork for further studies on safety, efficacy, and practical application.…

PMID: 40559424