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WANNA KNOW WHY THEY ARE PUSHING THE COLLAGEN ON THE TRUTHER MLM SITES ? Collagen-based scaffolds 15.4 Collagen gel Collagen gels are very attractive for tissue engineering applications because they can retain cells and carry bioactive molecules such as growth factors. Collagen gels can be formed by shifting the pH of dispersion away from its isoelectric point. Alternatively, the collagen material can be subjected to a chemical modification procedure to change its charge profile to a net positively charged or negatively charged protein before hydrating the material to form a gel matrix. https://www.sciencedirect.com/topics/chemistry/collagen-gel