Insights & Discussion
Green tea consumption has been found to be effective in preventing the contraction of influenza infections.
To identify the potential benefits of green tea in influenza prevention, a methodical review and combined analysis of eight distinct research studies involving 5,048 participants was completed. The effect of green tea catechin treatment was tested against control conditions and assessed based on infection rates. Five of these studies were randomized controlled trials involving 884 participants and three were cohort studies with 2,223 participants. Subgroups such as those who gargled or took orally ingested forms of green tea were also analyzed separately. Further to this, the possibility of publication biases was evaluated using Begg's and Egger's tests.
The results showed both the randomized trials and the cohort studies displayed significant preventative effects on influenza infection for those treated with green tea catechins. Notably, there was no evidence of non-uniformity within the data, reinforcing these findings. The pooled results of different consumption methods further supported these findings, showing no disparities among the subgroups. These results suggest the consumption of green tea has tangible prophylactic effects against influenza infection.
Discover Related Insights
Bee-collected pollen and bee bread, particularly when artificially fermented, demonstrate significant antiviral activity against the H1N1 strain of the influenza A virus.
2023 Foods Antiviral Activity of Beebread, Bee-Collected Pollen and Artificially Fermented Pollen against Influenza A Virus Dimitriou T, Asoutis Didaras N, Barda C, Skopeliti D, Kontogianni K, Karatasou K, et al.
Experimental Study Antiviral Bee Bread Bee Pollen
The research investigated the antiviral properties of bee-collected pollen (BCP) and bee bread (BB), including versions that had undergone artificial fermentation. The experiment also assessed separate proteins, water content, and -butanol portions of these substances. The analysis evaluated their effectiveness against the H1N1 strain of the influenza A virus (IAV). The antiviral behavior of these materials was taken in lab conditions via a comparative real-time PCR analysis working on their inhibitory concentration and selectivity index.
The outcomes revealed artificial fermentation improved the antiviral effectiveness of BCP. The protein fractions within the BCP and BB presented the greatest antiviral activity. Observations also highlighted that the chemical composition, prominent in proteins, and potentially microbiome metabolism determined the antiviral properties of BCP and BB. The chemical profile analysis emphasized the existence of some specialized metabolites that might be contributing towards this antiviral action.
Tea catechins, found in green tea, may reduce the rates of influenza infection and diminish certain cold symptoms.
2018 Molecules Effect of Tea Catechins on Influenza Infection and the Common Cold with a Focus on Epidemiological/Clinical Studies Furushima D, Ide K, Yamada H
Review Article Antiviral Common Cold Green Tea
The research methodology started with interpreting several experimental studies which reported that tea catechins can inhibit influenza viral adsorption and suppress replication and neuraminidase activity. These catechins were also found effective against some common cold viruses and helped to enhance immunity against such viral infections. Additionally, epidemiological studies conducted since the late 1990s were examined which suggested that regular consumption of green tea may decrease influenza infection rates and some cold symptoms, and gargling with tea catechin could potentially protect against the development of influenza infection.
For the discussion of results, the studies collectively showed that tea catechins have potential antiviral activity against influenza and some cold viruses. Although clinical evidence supporting these effects remained unconclusive, the review showed promising trends. The consumption of green tea and gargling with tea catechins could lead to potentially decreased rates of influenza infection and lessened cold symptoms according to the analyzed epidemiological studies.
Honey, in general, and particularly manuka honey, has potent inhibitory activity against the influenza virus, demonstrating a potential medicinal value.
2014 Archives of Medical Research Anti-influenza Viral Effects of Honey In Vitro: Potent High Activity of Manuka Honey Watanabe K, Rahmasari R, Matsunaga A, Haruyama T, Kobayashi N
Network Pharmacology Antiviral Honey Influenza
Antiviral activities of honey samples were evaluated using MDCK cells. To elucidate the possible mechanism of action of honey, plaque inhibition assays were used. Synergistic effects of honey with known anti-influenza virus drugs such as zanamivir or oseltamivir were tested.
Manuka honey efficiently inhibited influenza virus replication (IC50 = 3.6 ± 1.2 mg/mL; CC50 = 82.3 ± 2.2 mg/mL; selective index = 22.9), which is related to its virucidal effects. In the presence of 3.13 mg/mL manuka honey, the IC50 of zanamivir or oseltamivir was reduced to nearly 1/1000th of their single use.
Manuka honey exhibits significant anti-influenza viral activity, inhibiting replication with virucidal effects. Combining manuka honey with existing drugs enhances their efficacy, suggesting its medicinal potential.
2014 Archives of Medical Research Anti-influenza Viral Effects of Honey In Vitro: Potent High Activity of Manuka Honey Watanabe K, Rahmasari R, Matsunaga A, Haruyama T, Kobayashi N
Network Pharmacology Antiviral Honey Influenza
This study aimed to address the urgent need for novel anti-influenza drugs by evaluating the anti-viral activity of honey, focusing on manuka honey. Antiviral activities were assessed using MDCK cells, revealing that manuka honey efficiently inhibited influenza virus replication with an IC50 of 3.6 ± 1.2 mg/mL and a CC50 of 82.3 ± 2.2 mg/mL, resulting in a selective index of 22.9. Virucidal effects were identified as the underlying mechanism. Furthermore, combining manuka honey with zanamivir or oseltamivir significantly enhanced their efficacy, showcasing the potential medicinal value of honey, particularly manuka honey, against the influenza virus.
The study underscores the potent inhibitory activity of honey, especially manuka honey, against influenza viruses, offering promising medicinal implications. The observed virucidal effects and the synergistic enhancement of known anti-influenza drugs highlight the multifaceted potential of honey in combating influenza infections. Further exploration of the specific mechanisms underlying these effects could contribute to the development of effective anti-influenza therapies.