A : Improves immunity and is crucial for growth & development. When stressed or exhausted after workout , it helps to bounce back.
Found in Milk, dark leafy vegetable, orange & yellow vegetables.
Can read more at https://www.healthline.com/nutrition/vitamin-a-benefits
D- Aids in calcium absorption so important for muscles and bones.
Human body is capable to produce vitamin D when exposed to sunlight. That is the natural and the best source. However a person can also boost their vitamin D intake through certain foods like fish and egg yolk or also via supplements which are extremely popular these days.
Can read more at https://www.medicalnewstoday.com/articles/161618