stella
Type 2 DiabetesMarch 2023Summary reviewed August 2026

A Once-Weekly Insulin Shot Controlled Blood Sugar as Well as Daily Insulin

People with type 2 diabetes who switched to a once-weekly insulin injection had the same blood sugar control as those on daily insulin. Both groups lowered their HbA1c (a measure of average blood sugar) by about 0.6-0.7% over 32 weeks. The weekly shot also caused 25% fewer low blood sugar episodes.

What the trial was testing

The trial enrolled 399 patients with type 2 diabetes. The study was sponsored by Eli Lilly and Company and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was initial testing (phase 2). Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

The once-weekly insulin caused 25% fewer low blood sugar episodes compared to daily insulin.

The lancet. Diabetes & endocrinology · 2023 · NCT03736785

These findings — that weekly insulin caused fewer dangerous blood sugar drops than daily insulin — were published in the The lancet. Diabetes & endocrinology and represent the headline result of the study.

Researchers tracked outcomes across 399 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with type 2 diabetes, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

This treatment is still in testing and not yet FDA-approved. If you're on daily insulin and struggling with the routine, this research suggests a once-weekly option might work just as well with fewer lows. Talk to your doctor about whether you might qualify for a clinical trial testing this approach.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.