Your immune system consists of a complex collection of cells, processes, and chemicals that constantly defends your body against invading pathogens, including viruses, toxins, and bacteria. Keeping your immune system healthy. Making healthy lifestyle choices by consuming nutritious foods and getting enough sleep and exercise are the most important ways to bolster your immune system.

Here, Nutracore supplement suggest Following Supplement that are known for Boost immune system.
 
  1) Vitamin-D

Vitamin D is a fat-soluble nutrient essential to the health and functioning of your immune system.

Many people are deficient in this important vitamin, which may negatively affect immune function. low vitamin D levels are associated with an increased risk of upper respiratory tract infections, including influenza and allergic asthma. Some studies show that supplementing with vitamin D may improve immune response. Vitamin D helps regulate the amount of calcium and phosphate in the body.

         Sources of Vitamin-D

• oily fish: such as salmon, sardines, herring and mackerel
• red meat
• liver
• egg yolks
• fortified foods

       How much vitamin-D do I need?

Babies up to the age of 1 year need 8.5 to 10 micrograms of vitamin-D a day.

Children from the age of 1 year and adults need 10 micrograms of vitamin-D a day.

     2) Vitamin-C

Vitamin C, also known as ascorbic acid, has several important functions. This vitamin supports the function of various immune cells and enhances their ability to protect against infection. It’s also necessary for cellular death, which helps keep your immune system healthy by clearing out old cells and replacing them with new ones.
Vitamin C is vital for immune health. Supplementing with this nutrient may help reduce the duration and severity of upper respiratory tract infections, including the common cold.

    Sources of Vitamin-C

Vitamin-C is found in a wide variety of fruit and vegetables.

Good sources include:

• citrus fruit, such as oranges and orange juice
• peppers
• strawberries
• blackcurrants
• broccoli
• brussels sprouts

How much Vitamin-C do I need?

Adults aged 19 to 64 need 40mg of vitamin-C a day.

You should be able to get all the vitamin-C you need from your daily diet.

Vitamin-C cannot be stored in the body, so you need it in your diet every day.

    3) Vitamin-E

Vitamin-E helps maintain healthy skin and eyes, and strengthen the body's natural defence against illness and infection.

     Sources of Vitamin-E

Vitamin E is a group of compounds found in a wide variety of foods.

       Good Sources Include:

• plant oils – such as rapeseed (vegetable oil), sunflower, soya, corn and olive oil
• nuts and seeds
• wheatgerm – found in cereals and cereal product

    How much vitamin-E do I need?

The amount of vitamin E you need is

• 4mg a day for men
• 3mg a day for women

You should be able to get all the vitamin-E you need from your diet.

Any vitamin-E your body does not need immediately is stored for future use, so you do not need it in your diet every day.

      4) Vitamin-A

also known as retinol, has several important functions.

      Sources of Vitamin-A

• Cheese
• Eggs
• oily fish
• fortified low-fat spreads
• milk and yoghurt
• You can also get vitamin A by including good sources of  beta-carotene in your diet, as the body can convert this into retinol.

The main food sources of beta-carotene are:

• yellow, red and green (leafy) vegetables, such as spinach, carrots, sweet potatoes and red peppers
• yellow fruit, such as mango, papaya and apricots

       How much vitamin-A do I need?

The total vitamin A content of a food is usually expressed as micrograms (µg) of retinol equivalents (RE). The amount of vitamin A adults aged 19 to 64 need is:

• 700 µg a day for men
• 600 µg a day for women

       5) Vitamin-K

Vitamin-K is a group of vitamins that the body needs for blood clotting, helping wounds to heal. Vitamin K is actually a group of compounds. The most important of these compounds appears to be vitamin K1 and vitamin K2. Vitamin K1 is obtained from leafy greens and some other vegetables. Vitamin K2 is a group of compounds largely obtained from meats, cheeses, and eggs

Sources of Vitamin-K

• green leafy vegetables – such as broccoli and spinach
• vegetable oils
• cereal grains

How much vitamin K do I need?

Adults need approximately 1 microgram a day of vitamin K for each kilogram of their body weight. You should be able to get all the vitamin K you need by eating a varied and balanced diet. Any vitamin K your body does not need immediately is stored in the liver for future use, so you do not need it in your diet every day.

Many supplements on the market may help improve immune health. Zinc, elderberry, and vitamins C and D are just some of the substances that have been researched for their immune-enhancing potential. Aiming to eat a nutrient-dense balanced diet, getting enough sleep, engaging in regular physical activity, and not smoking (or considering quitting, if you smoke) are some of the most important ways to help keep your immune system healthy and reduce your chances of infection and disease.