Both involve high blood sugar, but the underlying cause and typical management are quite different.
| Feature | Type 1 | Type 2 |
|---|---|---|
| Cause | Immune system attacks insulin-producing cells | Body becomes resistant to insulin |
| Usual onset age | Often in childhood/young adulthood | Usually adults, increasingly younger |
| Insulin needed | Always, from diagnosis | Sometimes, depends on progression |
| Linked to weight | Not typically | Often linked to excess weight |
| Onset speed | Can develop quickly | Develops gradually, often unnoticed |
An autoimmune condition where the body's immune system destroys the cells that make insulin. It's not preventable and always requires insulin therapy from diagnosis onward.
The more common form, where the body doesn't use insulin effectively. It develops gradually and is strongly linked to lifestyle factors, though genetics play a role too — it can often be managed or delayed through diet, exercise, and weight management, with medication added as needed.
Extreme thirst, frequent urination, unexplained weight loss, or fruity-smelling breath can signal dangerously high blood sugar (diabetic ketoacidosis) — this needs emergency care, especially in Type 1.
This comparison is for general awareness only and cannot replace a medical diagnosis. Many conditions share overlapping symptoms — a doctor can examine and test to tell them apart accurately.