The most abundant are type I and III3. It should be noted that in the dermis there are seven distinct types of collagen that differ both in their quaternary structure and in their amino acid disposition nulante. The most abundant are type I and III3.
Senescence and finally death are considered as two facts that fall within the normal perspectives of any living cell or organism. To combat physiological aging, man seeks methods that alleviate it. We know that in 1990, 12% of the population in civilized countries was at least 65 years old.
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