Immunity supplements for adults are available over the counter at any chemist, but if you are looking to increase immunity in adults, the best way is to do it naturally, with the right diet. Here is a list of natural immune boosters immune boosters for adults that you can add to your diet. Image Source 1: Turmeric If you want to improve immunity in adults, then this is the first spice you should turn to. Thankfully, Indians are no strangers to turmeric, as almost all of our native foods, from dal to sabzis, are cooked using turmeric. The main active ingredients in turmeric, curcumin and theracurmin, help build immunity and provide relief from cough, cold and sore throat. It can also reduce hay fever symptoms like sneezing, itchy runny nose, and congestion. The body cannot absorb the benefits of turmeric as-is, though - it needs to be combined with some kind of fat and black pepper for better absorption. This makes haldi-doodh or turmeric milk a good option to ga