Results can be inconsistent
10.1016/0885-4505(92)90067-9 [DOI] [PubMed] [Google Scholar] 30.Gambichler T, Kreuter A, Susok L, Skrygan M, Rotterdam S, Hxtermann S, et al
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& Katz, P
Approval may be retracted if the trials fail to meet their primary and secondary endpoints
In actual skincare products, that research translates into formulas marketed for firmer, smoother-looking skin, a more even-looking texture, and a softer look to fine lines over time
