- ITS Liquid Media Supplement is a widely used serum‑free additive designed to support cell growth, viability, and metabolic stability in mammalian cell‑culture systems. The supplement contains three essential components—insulin, transferrin, and selenium—that collectively enhance nutrient uptake, iron transport, antioxidant protection, and cellular metabolism. ITS is frequently used in serum‑free culture, cell‑line maintenance, stem‑cell expansion, and specialised differentiation workflows where controlled, defined media conditions are required. Its ability to replace or reduce serum makes it valuable in experiments requiring reproducibility, reduced variability, and regulatory‑compliant culture conditions.
- The insulin component of ITS promotes glucose uptake and supports anabolic metabolism, helping cells maintain energy balance and biosynthetic activity under low‑serum conditions. Transferrin functions as an iron‑transport protein, delivering iron safely to cells while preventing oxidative stress associated with free iron. Selenium acts as a cofactor for antioxidant enzymes such as glutathione peroxidase, protecting cells from reactive oxygen species and supporting redox homeostasis. Together, these components create a stable biochemical environment that supports cell proliferation, viability, and metabolic function without relying heavily on undefined serum components.
- ITS Liquid Media Supplement is used across a wide range of cell‑culture applications. In serum‑free and low‑serum media formulations, ITS provides essential growth factors that maintain cell viability and reduce stress responses. In stem‑cell workflows, ITS supports expansion of mesenchymal stem cells, neural progenitors, and epithelial stem cells by providing controlled nutrient and antioxidant support. In endocrine and metabolic studies, ITS allows researchers to examine hormone‑responsive pathways without interference from serum‑derived hormones. ITS is also used in hepatocyte cultures, pancreatic islet studies, and adipocyte differentiation protocols, where defined media conditions are critical for reproducibility. Because ITS reduces reliance on serum, it is frequently used in regulatory‑compliant and xeno‑free workflows.
- Several manufacturers supply high‑quality ITS supplements for research and industrial use. Sigma‑Aldrich (Merck) offers ITS and ITS‑X formulations, with ITS‑X providing additional albumin for enhanced stability in sensitive cell types. Gibco (Thermo Fisher Scientific) provides ITS supplements compatible with a wide range of basal media, including DMEM, RPMI‑1640, and serum‑free formulations used in stem‑cell and primary‑cell culture. Corning® and other suppliers offer ITS blends tailored for specialised applications such as epithelial‑cell culture, metabolic studies, and organoid systems. These formulations vary in concentration, purity, and additional stabilisers, allowing researchers to select the optimal supplement for their specific workflow.
- Proper use of ITS Liquid Media Supplement requires attention to concentration, media compatibility, and experimental design. ITS is typically added to basal media at defined working concentrations, ensuring consistent nutrient and antioxidant support. Because ITS contains insulin, researchers must consider its effects on metabolic pathways, glucose uptake, and hormone‑responsive signalling. In serum‑free workflows, ITS may be combined with additional supplements such as growth factors, albumin, or B27 depending on cell‑type requirements. When used correctly, ITS provides reproducible, stable, and defined culture conditions that support high‑quality experimental outcomes.
- Overall, ITS Liquid Media Supplement is a cornerstone additive in modern cell‑culture practice. Its defined composition, metabolic support, and antioxidant protection make it indispensable in serum‑free media formulations, stem‑cell workflows, metabolic studies, and regulatory‑compliant culture systems. Whether used to reduce serum, stabilise cell metabolism, or support sensitive cell types, ITS provides reliable and reproducible performance that enhances the quality and consistency of cell‑culture experiments.
