Fasting
With all the focus on how certain foods affect your immune system, you may also wonder, what about fasting? One study in mice showed that fasting, or more specifically refeeding after a fast, restored immune function that had been suppressed by chemotherapy.
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During the fasting period itself, however, it appeared to impair the immune system. In addition, the beneficial response to refeeding may be lessened in the elderly.
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These are very important caveats. Over the long term, intermittent fasting and refeeding may boost the immune system. However, during an acute pandemic, where the immediate risk of infection is higher than usual, it may not be a good time to try fasting, given the potential for a temporary decrease in immunity.
This may sound surprising for those who have heard the phrase, “starve a fever.” The theory is that humans have evolved to not feel hungry and purposely avoid food during an acute illness as a protective mechanism, which may in turn limit nutrients the virus needs to replicate. To be clear, this is all conjecture without any quality supporting evidence.
Other evidence suggests that ketones are beneficial for immune function, and perhaps that could be why some recommend fasting.
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But considering all of the data together, if that were the case, you would likely be better off eating a keto diet and not fasting.
Based on the limited data available, we suggest not fasting longer than 36 hours during the outbreak of the coronavirus, especially if you are older than 60 years old. It’s logical that you can continue with shorter-duration time-restricted eating, although there is no data on this either.
This is taken from a comprehensively article on DietDr.com. Generally the advice seems to be keto is good, extended fasts not so good during a pandemic!
Keep well guys!