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Recent studies have shown that even if you feel healthy and fit, your immune system could be aging quicker than you think, which could increase the risk of infections and immune-related disorders.

"Immune aging, like all aging, means that our immune systems start to slow down, make more mistakes and be less effective at protecting us from infection as we get older ," Chris Rhodes, Ph.D., a nutritional biochemist and longevity expert in California, told Fox News Digital.

When the immune system ages, immune cells become less able to perform crucial functions like fighting infection, destroying cancer cells and healing wounds, according to Rhodes, who is also the CEO and co-founder of Mimio Health in San Francisco.

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