What types of foods need to be developed based on cereals, pulses, millets, herbs as well as with processing treatments such as fermentation, germination,soaking, roasting etc.
— Vitamin C from fresh fruits especially orange, lemon, Mango. Also, Apple, banana (should be fresh, not cooked as vitamin C can evaporate while cooking, even sun/air drying).
- Vitamin D from Sunlight, at least 15 minutes a day outdoor ( some studies do not recommend Supplement for this vitamin).
As we know that dark-skinned people need to spend more time under the sun to get this D. can take both.
- Vitamin B12 better from the Nuts, egg; the supplement is ok for B12.
People taking fish & meat need not worry about this vitamin as far as it is cooked well. Not advisable to consume more meat during this COVID or any other bacterial or viral outbreak like now.
But, some professionals‘ work-life is so busy that they do not find time to eat a balanced diet without meat to get all nutrients, for example, B-12.
'Chyawanprash' - an Indian traditional bioactive health supplement, is also an interesting nutraceutical formulation to promote immunity and treat respiratory disorders: Article Chyawanprash: A Traditional Indian Bioactive Health Supplement
Please see the RG links below.
Article Protective Foods to Develop Immunity of Individuals against COVID 19
Article Antiviral Functional Foods and Exercise Lifestyle Prevention...