Almonds

In an in vitro study funded by the Almond Board of California, a group of scientists found that finely ground almonds significantly increased the levels of certain beneficial gut bacteria. The almond preparation was found to lose its prebiotic effect its fat content was removed, suggesting that the probiotic bacteria only use the lipids in almonds for growth.

 

But there's also another reason why almonds make it to this list of the best foods to eat after antibiotics: A 2010 study found that almonds can help fight off viral infections such as the common cold and flu. After taking antibiotics, you are more prone to new infections as a result of a weakened immune system.

The researchers responsible for this almond study found that naturally occurring chemicals found in almond skins improved the ability of the white blood cells to detect viruses and to boost the body's ability to prevent viruses from replicating. Even after the almonds had been digested in the gut, there was still an increase in the body's ability to fight viruses.