Old mice that got MOTS-c for a week had muscle glucose uptake as good as young mice, reversing age-related insulin resistance.

Old mice that got MOTS-c injections responded to insulin just as well as young mice, meaning the peptide might fix the insulin resistance that comes with aging.

When mice were given a daily shot of a peptide called MOTS-c, their bodies became better at using sugar for energy and responding to insulin, especially in their muscles.

Diabetic rats given MOTS-c had lower blood sugar levels after fasting, showing better control of glucose.

After a week of MOTS-c injections, mice could process insulin better, needing 30% more glucose to keep blood sugar stable during a test.