factually
Index/People/Chen

Chen

Family name

Fact-Checks

2 results
Jan 30, 2026

What peer-reviewed studies exist on contrail formation and atmospheric persistence?

A substantial body of peer‑reviewed research describes how , when they persist, and how long they can influence climate: foundational thermodynamic theory and the Schmidt–Appleman Criterion explain fo...

Jan 19, 2026

What randomized controlled trials compare berberine plus metformin versus metformin alone for glycemic outcomes and adverse events?

Randomized controlled trials exist that directly compare berberine combined with metformin versus metformin alone, mostly small, short-duration studies conducted in China and pooled in recent meta-ana...