Many factors affect how our immune system works. But one of the most important remains our lifestyle, as well as our daily habits, which can actually do enough harm to our body, according to the publication Eat This, Not That.!

Eating a lot of processed foods.

A diet of predominantly processed foods and no fresh fruits and vegetables can weaken your immune system. Processed foods are often high in saturated fat or loaded with added sugars. Excessive consumption can lead to chronic inflammation in the body, which can ennoble the immune system..

Not getting enough sleep.

As Harvard experts point out in this year's guide, lack of sleep, or lack of rest in general, can hinder the body's ability to fight infection.. When we sleep, a cytokine (a molecule that is critical to immune function) is released that helps fight infection. Thus, reducing your sleep can then reduce the number of cytokines and other important immune cells..

Alcohol.

Many of us look forward to a glass of wine, whiskey, or beer at the end of the day.. But excessive alcohol consumption can also negatively affect your immune system.. More specifically, alcohol can impair or suppress the normal activity of immune cells, Harvard experts say..

Smoking cigarettes.

Smoking cigarettes can not only harm the immune system, making it less successful at fighting disease, but also upset its balance, increasing the risk of a number of autoimmune diseases, according to the CDC..

Ignoring stress.

Chronic stress can quietly harm your immune system. The stress that releases the hormone cortisol can suppress the inflammation required to activate immune cells and, according to Harvard, the action of white blood cells. White blood cells, also known as lymphocytes, help fight infection, according to the Cleveland Clinic.

Excess weight.

According to experts from Harvard, the presence of obesity is associated with low-grade chronic inflammation..

Adipose, or adipose, tissue produces adipocytokines, which may contribute to inflammation. "

Chronic diseases.

This is not a habit. For some people, chronic diseases such as autoimmune disorders are inevitable, no matter how healthy, what they eat, or how many hours per week they exercise.. Very often people are born with an autoimmune disease that makes itself felt at a later age. Some of these disorders can attack and potentially disable immune cells, Harvard experts note..

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