Teprenone, a synthetic active produced by manufacturer Sederma, is believed to provide all-round anti-ageing benefits by supporting the cells natural replication process, and preventing telomere lengthening in the process. Whilst the research is not robust enough to prove this, the study carried out showed promising in-vivo results after 1 month, with instrumental results showing an improvement in skin firmness, elasticity & tone. The same study also showed an improvement in skin smoothness and skin redness, as well as a reduction in pore size.