Does freezing reduce SVF cell viability after thawing?

Cryopreservation means cooling and storing cells, tissues or organs at very low or freezing temperatures so they can be used later[1]. For adipose-derived SVF, cells are mixed with a cryoprotectant, cooled in a controlled way and held in liquid nitrogen at about −196 °C. The process is not loss-free, because some cells do not survive freezing and thawing.

A 2019 study in Plastic and Reconstructive Surgery – Global Open reported that cryopreservation reduced SVF cell counts. The stem cell potency of the surviving cells was not reduced[3]. A 2026 systematic review in Tissue Engineering and Regenerative Medicine examined the effects of cryopreservation on SVF viability in human adipose tissue across published studies[4]. How much viability is lost depends on the freezing medium, the cooling and thawing protocols and how long the cells are stored. The cited sources do not give one viability percentage that applies to every cell bank.

In practice, a stored product's usefulness depends on measured results, not on storage alone. International guidance from the ISSCR covers quality standards and documentation for cell products used in clinical translation[2]. Before banking, it is reasonable to ask a provider:

• how viability is tested after thawing, and what its own results are;
• whether any approved future use exists for the cells;
• whether the facility is licensed for cell processing and storage.

A specialist can explain whether a post-thaw cell count would be enough for any intended use.