Usually, in order to maintain the immune system, a person will take a supplement containing nitric oxide. This is the only thing to do, but it is well known that not only is it necessary to be pursued for good immunity. Because there are some other things you should do to get a good immune system and not easily decline.
One of the things you should do is consume the fruit with a stable and regular period of time. There are several types of fruit that you can consume to keep the immune system, like
This fruit is considered to have a good source of vitamin E for the body. Kiwifruit is rich in nutrients for immunity. And what you know is that this fruit has a lot of vitamin C compared to citrus fruits.
Apple is fruit that has a vitamin C content is high enough. Because of this content, apples are often processed as health drinks.