sagging skin.
Xavier Brennan

Health Reporter · Editorial staff

Xavier Brennan

Reports on the research and technology behind skin tightening treatments, with a focus on what the evidence actually supports.

1 story by Xavier Brennan

Treatments · 5 min · Xavier Brennan

Why Depth Matters: How RF, Ultrasound, and Lasers Heat Different Layers of Sagging Skin

Most skin tightening devices work by heating tissue, but where that heat lands, and how deep it goes, largely determines what a treatment can and cannot do. A plain-English guide to the anatomy behind the marketing.

August 6, 2026

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