The Kimera Collection: Find Your Signature

A scientific review of exosome concentration in published research

Laboratory studies consistently report that the amount of extracellular vesicle (exosome) material applied changes how cells respond [1, 2]. Studies often express that amount as a particle count, such as vesicles per cell [2], the same kind of figure Kimera Labs states for each vial.

• Cell studies

  What the research shows

  Human skin fibroblasts exposed to more mesenchymal stem cell exosome material proliferated and migrated more, and secreted more type I and III collagen and elastin, in a dose-dependent way [3, 4]. In a study of vesicles from 12 cell sources, given at 20 to 200,000 vesicles per cell, dose shaped the response more than the source did [2].

  Where research is heading

  Researchers are now mapping how vesicle amount and cell source work together, with distinct cellular response profiles observed across the concentration range [2].

• Animal studies

  What the research shows

  A systematic review of 39 animal studies found that vesicles from stem cells sped skin closure and re-epithelialization in a dose-dependent manner [5].

  Where research is heading

  A review of 64 preclinical studies describes the field moving toward potency-based dosing, which measures the active cargo a preparation carries [1]. International guidelines set out complementary methods for characterizing vesicles, from particle counts to marker profiles [6].

• Human studies

  What the research shows

  A 2026 systematic review of 16 studies with 503 participants found that most facial studies reported improvement in at least one skin quality measure, and none reported a serious adverse event [7].

  Where research is heading

  Clinical research in aesthetics is building quickly: 16 studies with 503 participants met the criteria for the 2026 review, with facial skin quality as a leading focus [7].

This review summarizes the published research literature on exosome material. Kimera Labs states the particle count of every vial, the same metric researchers report, so practices can compare formats on the scientific terms the literature uses. How much material is used in a session is the licensed practitioner's decision.

References

1. 1.Gupta D, Zickler AM, El Andaloussi S. Dosing extracellular vesicles. Adv Drug Deliv Rev. 2021;178:113961. DOI article · PubMed record
2. 2.Hagey DW, Ojansivu M, Bostancioglu BR, et al. The cellular response to extracellular vesicles is dependent on their cell source and dose. Sci Adv. 2023;9(35):eadh1168. DOI article · PubMed record
3. 3.Shabbir A, Cox A, Rodriguez-Menocal L, Salgado M, Van Badiavas E. Mesenchymal stem cell exosomes induce proliferation and migration of normal and chronic wound fibroblasts, and enhance angiogenesis in vitro. Stem Cells Dev. 2015;24(14):1635-1647. DOI article · PubMed record
4. 4.Zhang J, Guan J, Niu X, et al. Exosomes released from human induced pluripotent stem cells-derived MSCs facilitate cutaneous wound healing by promoting collagen synthesis and angiogenesis. J Transl Med. 2015;13:49. DOI article · PubMed record
5. 5.Dalirfardouei R, Gholoobi A, Vahabian M, et al. Therapeutic role of extracellular vesicles derived from stem cells in cutaneous wound models: a systematic review. Life Sci. 2021;273:119271. DOI article · PubMed record
6. 6.Welsh JA, Goberdhan DCI, O'Driscoll L, et al. Minimal information for studies of extracellular vesicles (MISEV2023): from basic to advanced approaches. J Extracell Vesicles. 2024;13(2):e12404. DOI article · PubMed record
7. 7.Gaebe K, Lowe K, Bosnalie D, et al. Effectiveness and safety of extracellular vesicle-based therapies for nonsurgical facial rejuvenation: a systematic review. Facial Plast Surg Aesthet Med. Published online July 22, 2026. DOI article · PubMed record

Also in the collection

Vive

A ready-to-use topical serum with MSC exosomes, hyaluronic acid, amino acids and trehalose. 5.0 mL vial, reference VPI0501, 2 trillion microvesicles as stated by the manufacturer.

View Vive