The invention relates to synergistically active, ternary mixtures which boost collagen synthesis and to the uses thereof, in particular for slowing down skin ageing and for wound healing of damaged skin. The invention furthermore relates to the use of the ternary mixtures according to the invention for treating the oral cavity and pharynx, and in particular therein for preventing and slowing down periodontitis, for building up periodontal connective tissue and for preventing and treating infections in the oral cavity and for wound healing in the oral cavity.