Hi, Natural sources of
Vitamin C are always better than any supplements. Amla, Lemon, Guava are rich sources and should be included. All Herbs and condiments of our Indian diet like Sauf,Kesar,Elaichi,Clove,Tulsi can improve our immunity.Put it in water and boil it to half then drink this concoction 2-3 times a day. Also Chyawanprash has a lot of herbs but its got lot of
sugar too. Deep coloured fruits and vegetables like Carrot,Beetroot,Leafy vegetables,Papaya,Watermelon,Oranges will also help.Lemon added to water 2-3 times a day will also help.