Name the disease caused due to lack in insulin secretion.

Explanation

**Step-by-Step Solution:**

1. **Understanding Insulin**: Insulin is a hormone that is crucial for regulating blood sugar levels. It is produced by the beta cells in the pancreas.

2. **Role of Insulin**: Insulin helps in converting glucose (sugar) in the blood into glycogen, which is stored in the liver and muscles for energy.

3. **Lack of Insulin**: When there is a lack of insulin secretion, the body cannot effectively convert glucose into glycogen. This leads to an increase in blood sugar levels.

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