Depends on how big the demand is and the type of cell we are talking about. According to a 2011 study published in the journal Environmental Science & Technology, we shed between 0.03 and 0.09g of skin cells every hour. regarding hair cells, it’s normal to shed between 50 and 100 hairs a day. These cells are fairly quick to regenerate because they are the cells that are most exposed, and therefore, take the most environmental wear n tear. As you know, healing a cut in the face, or regrowing your hair when it is cut or plucked out, takes a much shorter time than fixing say, a muscle that is bruised, or a bone that is fractured.
https://www.businessinsider.com/how-long-it-takes-the-body-to-grow-hair-nails-cells-2018-4?amp
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