Peaches: It contains carbohydrates, protein, dietary fibre, vitamin C and vitamin A.

It also contains boron, known to boost estrogen levels in postmenopausal women and prevent osteoporosis. It is recommended to have two to three in numbers per day.

Are Ready made Health Boosters Effective?

"Supplementing your diet with vitamin pills is good, as we don't tend to eat all the foods that are rich in all essential daily nutrients. However, there are no studies to prove that having packaged health boosters that are available in market helps to boost your immune system," states Sushila.

According to Mumbai based Ayurvedic Doctor Anand Warrier, a health booster like Chyavanprash is definitely good for your immune system.

"However, it is better to buy it from an authentic Ayurvedic manufacturer like Kottakal Ayurvedashala than go for packaged and branded items," he informs.

Poor nutrition is the common cause of a weakened immune system. The next time you feel a cold or a fever coming get a dose of these immune boosting foods.