Why is fat tissue used as a source of stem cells?
Fat is plentiful and easy to collect by liposuction. A single procedure can produce from 100 ml to more than 3 litres of lipoaspirate. Breaking down this tissue releases the stromal vascular fraction (SVF), a mix of cells in which stem cells make up only about 2–10%. In the United States, the FDA lists fat-derived SVF among regenerative products marketed without approval, and it has received reports of serious harms linked to unapproved products.
Answer
SVF is separated from fat either with enzymes such as collagenase or with mechanical methods. The enzyme step is one reason US regulators treat SVF as more than a minimally manipulated product [9].
Stem cells in cosmetic surgery
In cosmetic surgery, "stem cell" procedures almost always use adipose-derived stem cells. The stromal vascular fraction (SVF), which contains them, is separated from liposuctioned fat and mixed into the fat being grafted, as in stem cell breast augmentation and stem cell fat grafting.
Sources
- journalComparative anatomy and metabolic profiles of brown and white adipose tissue in humans — Frontiers in Endocrinology · accessed Nov 10, 2026 · Evidence page
- journalPlasticity of Adipose Tissues: Interconversion among White, Brown, and Beige Fat and Its Role in Energy Homeostasis — Biomolecules (MDPI), via PubMed Central · accessed Nov 10, 2026 · Evidence page
- organizationAdipose Tissue (Body Fat): Anatomy & Function — Cleveland Clinic · accessed Nov 10, 2026 · Evidence page
- organizationVisceral Fat: What It Is & How It Affects You — Cleveland Clinic · accessed Nov 10, 2026 · Evidence page
- journalBrown adipose tissue: what have we learned since its recent identification in human adults — Arquivos Brasileiros de Endocrinologia & Metabologia · accessed Nov 10, 2026 · Evidence page
- journalLeptin 30 years – A chat with Jeffrey M. Friedman — Archives of Endocrinology and Metabolism, via PubMed Central · accessed Nov 10, 2026 · Evidence page
- journalLipodystrophies - StatPearls — NCBI Bookshelf, U.S. National Library of Medicine · accessed Nov 10, 2026 · Evidence page
- governmentObesity and overweight (fact sheet) — World Health Organization · accessed Nov 10, 2026 · Evidence page
- journalA Simple and Effective Mechanical Method for Adipose-Derived Stromal Vascular Fraction Isolation — Cureus, via PubMed Central · accessed Nov 10, 2026 · Evidence page
- governmentImportant Patient and Consumer Information About Regenerative Medicine Therapies — U.S. Food and Drug Administration · accessed Nov 10, 2026 · Evidence page