Thom, E A randomized, double-blind, placebo-controlled study on the clinical efficacy of oral treatment with DermaVite on ageing symptoms of the skin. [electronic resource] - The Journal of international medical research - 267-72 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial ISSN: 0300-0605 Standard No.: 10.1177/147323000503300301 doi Subjects--Topical Terms: Administration, OralAdultAgingDietary SupplementsDouble-Blind MethodFemaleHumansMiddle AgedPinusPlacebosPlant BarkPlant Extracts--administration & dosageProteins--administration & dosageSkin--drug effectsSkin Aging--drug effectsThioctic Acid--administration & dosageTime Factors