The National Institute for Health and Clinical Excellence (NICE) has issued a series of guidelines in an attempt to cut the "terrible toll of ill health" across the country.
The health organisation has suggested that people make small dietary changes, such as reducing their intake of salt and saturated fats.
NICE claims eating healthier would prevent tens of thousands of deaths from heart disease and stroke and would save millions of pounds every year.
Experts are urging the food sector as a whole to reduce salt and saturated fats levels and want trans fats, which can increase the risk of heart disease, removed from foods.
Professor Mike Kelly, public health director at NICE, said: "This isn't about telling individuals to choose salad instead of chips – it's about making sure that the chips we all enjoy occasionally are as healthy as possible.
"That means making further reductions in the salt, trans fats and saturated fats in the food we eat every day."
According to NICE, such changes could cut the "huge numbers of unnecessary deaths" from heart disease and stroke and save millions of pounds each year.
Nearly six million people in the UK are currently living with the disabling effects of cardiovascular disease, putting "substantial" strain on the NHS.
Some 40,000 people are killed by the condition each year.