New Zealand Study: High-Fiber Diet Improves COVID-19 Vaccine Immune Response

A study from the Malaghan Institute of Medical Research has found that a high fiber diet can improve the immune response to the first dose of a vaccine.  Published in Frontiers in Immunology, the finding has implications for how we might tailor our diets to stimulate the best protective effect from novel vaccines.

The study, funded by High Value Nutrition Ko Ngā Kai Whai Painga National Science Challenge, investigated immune responses to the influenza vaccine. Participants were asked to report on their diets, with samples of their gut microbiome tested to understand which types of bacteria were prevalent prior to vaccination. After being given the influenza vaccine, participants’ blood was then analysed to assess the resulting antibodies they produced and determine how responsive their immune system was to the vaccine.

Fiber-Rich Diet Important

“Initially, our goal was to see if there were any specific types of bacteria that could predict the immune response to the vaccine,” says the Malaghan Institute’s Dr Alissa Cait. “Interestingly, we found that for participants who were receiving their influenza vaccine for the first time, those who had ...

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