What is a characteristic of slow-acting insulin?

Slow-acting insulin is designed to provide a longer duration of glucose control, which is essential in managing blood sugar levels throughout the day. The characteristic of slow-acting insulin is that it generally takes 4 to 8 hours to start acting after injection. This onset period allows for gradual and steady absorption into the bloodstream, ensuring that insulin is available to help regulate blood glucose levels over an extended period.

This slower onset is particularly beneficial in helping to prevent spikes in blood sugar that can occur when food is ingested. It allows for better glycemic control, especially in patients with Type 1 and Type 2 diabetes who require a stable and long-term management strategy. The use of slow-acting insulin suits individuals who need a more predictable and sustained release of insulin, which is different from fast-acting insulins that are intended for rapid management of blood glucose surges associated with meals.