ts for increasing keratinocyte proliferation (such as retinoids, including retinol and retinyl palmitate, adenosine, phloroglucinol, walnut cake extracts sold by the company Gattefosse, and the extracts of Solanum tuberosum sold by the company Sederma) and/or fibroblast proliferation (such as plant proteins and polypeptides, extracted, for example, from soybean, and plant hormones such as giberrel