Around three million people in the UK have been diagnosed with diabetes, and it's believed figures could reach five million by 2025.
Every three minutes in the UK, somebody is diagnosed with either Type 1 or Type 2 diabetes. Both types can lead to devastating complications, including blindness, amputation and kidney failure.
Type 1 diabetes: This is believed to be an autoimmune disease with possible genetic factors, and it can occur at any age but most often starts in late childhood.
• With this type, the body destroys its own insulin-producing cells, so people have to inject insulin daily in order to regulate their blood sugar levels.
• Symptoms include feeling extremely thirsty, frequent need to urinate, excessive tiredness, frequent skin infections and unexplained weight loss.
Type 2 diabetes: This is far more common, making up 90% of all cases.
• It's Type 2 which is linked to lifestyle, with being overweight or obese the biggest risk factor. It mostly affects over 40s and the elderly, though in people of black or South Asian origin, known to be at higher risk, it can occur in people as young as 25.
• Symptoms are similar to Type 1, though weight loss isn't usually seen. However, unlike Type 1, the signs can progress slowly over time and it's believed there are thousands of people with Type 2 currently undiagnosed.
• Healthy diet and lifestyle are crucial for controlling it, but medication may also be required.
The NHS spends £10 billion (10% of its entire budget) on treating diabetes, 80% of which goes on treating complications.
The good news is that these can be avoided, providing people manage their condition well and have regular check-ups to spot the early warning signs of problems.
Here, three people share their advice on living with the condition: