Hi Dinesh, welcome to HCM.
You seem to be very healthy. Your concern towards having a healthy life is appreciated. However, its better not to rely on any supplements unless necessary. Stick to your healthy eating and consume a lot lot of fruits and vegetables which will help you in being immune. You can try organic foods if you feel there is a lot of adulteration. Fruits and vegetables are good sorces of vitamins and minerals
which will help you in getting the immunity.