# MCT1-driven mitochondrial lactate import supports heart metabolism

Researchers report that cardiac mitochondria import lactate through MCT1, helping sustain heart metabolism. The finding clarifies how the heart uses lactate as a fuel and may inform understanding of cardiac energy failure.

**Importance:** 3/5

## Sources

### Science
- [Nature](https://www.nature.com/articles/s41586-026-11182-3) — 2026-10-28