How much can stem cell therapy change your skin? What to expect and what remains unknown

Stem cell therapy for aesthetic purposes primarily uses cells extracted from your own fat or substances produced by those cells, applied to the skin to improve firmness and hydration[1][2]. While there are reports of increased skin thickness and hydration, high-quality research confirming efficacy and safety remains limited.[1][3][4]. What is understood differs depending on whether whole cells are used versus culture medium or exosomes.[5][6].

What is actually applied to your skin in stem cell therapy?

In aesthetic applications, cells extracted from your own fat are commonly used.[1] Fat is known to contain the highest concentration of stem cells — cells that serve as precursors for various cell types.[7].

When used without in-clinic cultivation, the extracted material contains not only stem cells but also many other cell types.[1]. Some treatments use culture medium (the liquid in which cells are grown) or exosomes (small particles released by cells) rather than the cells themselves.[2][5].

What improvements can you expect for your skin?

Reports indicate that injecting fat-derived stem cells into the skin can improve skin thickness, appearance, and hydration.[1]. Stem cells are thought to release growth factors (substances that support cell function) and inflammation-suppressing substances.[1].

For culture medium and exosomes, there is a report synthesizing 19 studies involving 624 people.[2]. Results showed skin elasticity increased by 27.07% and wrinkles reduced by over 10%.[2].

However, application methods varied across studies—some applied topically, some used microneedling, and some combined with lasers.[2]. Be mindful that these figures cannot be directly compared.

Can it be used for acne scars or hair loss?

For acne scars, one study of 25 people used an exosome gel after carbon dioxide laser treatment.[5]. Comparing each side of the face, the acne scar score decreased by 32.5%, exceeding the 19.9% reduction on the untreated side.[5].

The side treated with exosomes showed less redness and faster recovery, according to the report.[5]. For hair loss, research is advancing on hair regeneration using fat-derived stem cells and their components, but the field remains at the stage of demonstrating potential.[8].

What are the limitations? What remains unknown?

The primary challenge is that high-quality research confirming efficacy and safety remains scarce.[3][4]. In 2011, the American Society of Plastic Surgeons issued a statement that scientific evidence for assessing safety and efficacy in aesthetic stem cell therapy is very limited.[3].

A report synthesizing 82 clinical trials on fat-derived stem cells found that the median study size was 40 participants.[4]. Cell extraction and storage methods varied across trials, and long-term follow-up studies are few, according to the report.[4].

How many of the injected cells survive is a major factor affecting outcomes.[1]. Results vary with many conditions such as age, and predicting the final appearance is difficult—a point noted in textbooks.[1][7].

What differs between using cells versus using components?

Treatments using whole cells face challenges such as poor cell engraftment, potential tumor formation, and difficulty in quality control.[5]. Because exosomes do not contain cells, they are thought to avoid these stem cell therapy risks.[5].

On the other hand, exosomes have their own challenges: inconsistent manufacturing and purification methods, and unclear long-term effects.[6]. Large adverse effects have not been reported in culture medium and exosome studies; only minor temporary redness was observed. However, longer-term safety requires further research.[2].

How should you evaluate whether to pursue this treatment? What should you confirm during consultation?

Stem cell therapy is one option for addressing skin concerns, but we are not at a stage where we can guarantee the magnitude or duration of results.[3][4]. Start by asking how this treatment is positioned compared to other options for your specific concern.

During consultation, confirm whether whole cells, culture medium, or exosomes are used, and what research supports the treatment. This will make it easier to compare with other options.