Related by context. Frequent words. (Click for all words.) 58 collagen 58 biotin 57 chitin 55 hyaluronic acid 54 fibers 53 cuticle 52 Collagen 52 epidermis 52 calcium phosphate 52 fibrous 51 cellulose 50 follicle 50 peptide 50 epithelial cells 50 outer layer 50 retinol 49 hair follicles 49 hair follicle 49 hydrogel 49 elastin 49 connective tissue 49 amino acids 49 salicylic acid 49 skin 49 peptides 48 fibrin 48 protein 48 enzymes 48 polysaccharides 48 cysteine 48 cultured cells 48 microspheres 47 spider silk 47 glycoprotein 47 granules 47 bioactive 47 connective tissues 47 moisturizing 47 sebum 47 polymer 47 epithelial 47 proteins 47 Cartilage 47 exfoliation 47 digestive enzymes 47 polymers 47 polymeric 46 Peptide 46 lignin 46 amino acid 46 esters 46 dermis 46 glycerol 46 dermal 46 chemically 46 enzymatic 46 hormone estrogen 46 exfoliating 46 telomere 46 mucosa 46 epidermal 46 aluminum oxide 46 extracellular matrix 46 fibroblasts 45 fibrils 45 moisturize 45 myelin sheath 45 monomers 45 osteoclasts 45 exfoliate 45 colorants 45 biofilms 45 glial cells 45 cuticles 45 epithelium 45 lipids 45 articular cartilage 45 fatty tissue 45 hydrolysis 45 macromolecules 45 membrane 45 cell adhesion 45 tooth enamel 45 filaments 45 nanotubes 44 oxidants 44 moisturisers 44 riboflavin 44 alkali 44 nerve cells 44 tensile strength 44 pigments 44 pigmentation 44 glutamine 44 axons 44 pigment 44 nanotube 44 mesenchymal stem cells 44 gel 44 hoof wall 44 inorganic materials