While some foods can support your immune system, others may weaken it.
Second, gut bacteria produce short-chain fatty acids (SCFAs) byfermenting the fiber in your food.
Alcohol also disrupts sleep, which is essential for the immune system to be in tip-top shape.

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High blood sugar levels can also alter the gut’s permeability, contributing tochronic inflammation.
Fried Foods
Fried foods are higher in advanced glycation end products (AGEs).
These compounds naturally occur during cooking, especially at high temperatures like frying.
Caffeinated Beverages
Coffee andtea are high in antioxidantsthat can support a healthy immune system by reducing inflammation.
But if caffeinated, they can potentially interfere with quality sleep.
As noted in a 2021 review inCommunications Biology, numerous research studies have linked sleep with immune function.
In the case of sleep apnea, it can increase the risk of heart disease and stroke.
Most people generally eat a lotmore salt than is recommended.
According to theFDA, Americans consume about 3,400 milligrams of sodium per day.
And ideally, says theAmerican Heart Association, no more than 1,500 mg per day.
And limit how often you’re reaching for the salt shaker.
Instead, swap the salt out forherbs and spicesto ramp up the flavor in your dishes.
After all, you still need to enjoy life, too.
We also know that staying hydrated andeating enough protein is important.