Eating This Refrigerator Staple Is an Easy Way To Strengthen Your Immune System

Reported by Vogue.

Vitamin C gets all the immune-system credit, but there's a quieter overachiever sitting in your refrigerator right now. Eggs — yes, the unglamorous, under-$5 dozen — are one of the most nutrient-dense foods you can eat when your body needs to defend itself, according to Vogue.

The science starts in the gut. A review published in Nutrients found that 70 to 80% of immune cells live there, and that the gut microbiome directly influences T cells — the white blood cells responsible for fighting disease — while helping suppress inflammatory responses. What you eat shapes that environment, which is why Heather Viola, DO, primary care physician and medical director at Mount Sinai Doctors Primary Care Faculty Practice, is careful about the language she uses: diet doesn't boost immunity so much as it furnishes the raw materials — minerals, vitamins, protein — that immune cells need to develop and respond.

Why eggs specifically

Eggs are classified as a high-quality protein, meaning they contain all essential amino acids in proportions the body can actually use. That matters because, as Viola explains, immune cells and antibodies are built from amino acids. One in particular — tryptophan — pulls significant weight. A review in Frontiers in Nutrition identifies tryptophan as essential for protein synthesis and cell division, and Jan Stritzke, medical director of German health resort Lanserhof Sylt, points out that it connects immune regulation to serotonin and melatonin pathways, linking metabolism, sleep, and immunity in one chain. Beyond protein, eggs deliver selenium, vitamin B12, folate, choline, and trace amounts of vitamin D — what Stritzke calls "cellular resilience" nutrients. He stops short of calling eggs a miracle food, but confirms they belong in any immune-supportive eating pattern.

Method matters too. Viola recommends boiling, poaching, or low-heat scrambling to preserve micronutrients — high heat degrades more than you'd think. And if eggs genuinely aren't your thing, fruits, vegetables, legumes, nuts, seeds, fatty fish like salmon and sardines, and fermented dairy like yogurt all support immune function. Viola singles out vegetables high in vitamins A and C as particularly useful.

The real takeaway isn't to eat more eggs — it's that immune health is built daily, in ordinary meals, long before you feel that scratch in your throat.

Read the original at Vogue.