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With age, insufficient tryptophan alters gut microbiota, increases inflammation

Scienmag

Credit: Augusta University With age, a diet lacking in the essential amino acid tryptophan — which has a key role in our mood, energy level and immune response — makes the gut microbiome less protective and increases inflammation body-wide, investigators report.

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Delayed immune responses may drive COVID-19 mortality rates among men and the elderly

Scienmag

Immune responses to SARS-CoV-2 may depend on viral load and infection time course COVID-19 (SARS-CoV-2) infections tend to be more severe among older adults and males, yet the mechanisms underlying increased mortality in these two demographics are unknown.