Insulin is an important part of bodily function as it moves glucose from your blood into your cells where it is then converted into energy.
If someone has developed diabetes, the symptoms that could show include increased thirst and urination, increased hunger, fatigue, blurred vision and unexplained weight loss.
A person diagnosed with diabetes will need to look after their health very carefully for the rest of their life.
Simple diet changes are believed to help – including having two tablespoons of vinegar before a meal.
In a study carried out by professor of nutrition at Arizona State University. Carol Johnston, two tablespoons of the condiment before a meal – perhaps as part of a vinaigrette salad dressing – can dramatically reduce the spike in blood concentrations of insulin and glucose that come after a meal.
Excessive spikes in blood sugar can result in heart disease and stroke, nerve damage, diabetic retinopathy and kidney disease.
As part of the research, one-third of 29 volunteers had been diagnosed with type 2 diabetes, another third had signs they could become diabetic and the rest were healthy.
Each participants were given the vinegar dose or a placebo to drink right before they ate a high-carbohydrate breakfast that consisted of orange juice, a bagel and butter.
One week later they returned and had the opposite pre-meal treatment followed by the same breakfast.
After both sets of meals samples of their blood were taken.
All three groups had better blood readings after having meals which started with vinegar.
The people with signs of developing diabetes in the future saw the biggest gains.
Diabetes cases have hit 4.3 million in the UK, including 500,000 people that don’t even know they have the condition.
But what happens if symptoms go undetected?
The NHS says: says: “High glucose levels can damage blood vessels, nerves and organs.
“Even a mildly raised glucose level that doesn’t cause any symptoms can have long-term damaging effects.”