Regular exercise is also crucial for boosting your lifespan. Everyone should aim for at least 150 minutes of moderate-intensity activity every week.
Making some small dietary changes could also help to increase your life expectancy.
Eating more lemons could help you to avoid an early death and boost your immune system.
Lemons could improve the immune system as they contain plenty of vitamin C, said dietitian Juliette Kellow and nutritionist Dr Sarah Brewer.
Vitamin C is needed by certain immune cells to help them fight off diseases.
It’s also needed to help the body absorb iron – a nutrient that’s needed for wound healing.
“An optimally functioning immune system needs access to many micronutrients and omega-3 fats,” they said in their book ‘Eat Better Live Longer – Understand What Your Body Needs To Stay Healthy’.
“What’s more, a healthy does of ‘friendly’ bacteria goes a long way to supporting immunity and keeping you free of disease for longer.
“[Citrus fruits] are rich in vitamin C, a vital nutrient for keeping the immune system in tip-top shape.
“Several immune cells need vitamin C to perform their tasks, including T-cells and phagocytes [such as macrophages].
“Vitamin C also aids the absorption of iron, a nutrient needed for for immunity and wound healing.”
You could also improve your immune system by eating more mushrooms, they said.
Mushrooms contains copper, which is need by white blood cells to avoid infection.
They’re also a prebiotic that provide food for ‘good’ gut bacteria, which keeps the digestive tract healthy.
Eating at least five portions of fruit and vegetables every day is one of the best ways to live a healthy life.
Regular exercise is a crucial aspect to improving overall health, and helping you to live longer.
All UK adults should aim for about 150 minutes of moderate-intensity activity every week.
People that do regular exercise are up to 50 per cent less likely to develop type 2 diabetes and some cancers, said the NHS.
It may even slash the chances of coronary heart disease and stroke by up to 35 per cent.