A study investigated the effects of a topical application of an aqueous extract of Kelp (Fucus vesiculosus) on the thickness and the mechanical properties of human skin.
A gel formulation that included 1% of the extract was applied topically to human cheek skin twice daily for five weeks.
A significant decrease in skin thickness measured by B-mode ultrasound was elicited. There was a significant improvement in elasticity, as measured with a Cutometer, compared with controls.
In cheek skin, the thickness normally increases and the elasticity usually decreases with age.
The results of this study suggest that the Fucus vesiculosus extract possesses anti-ageing activities and should be useful for a variety of cosmetics.
Reference: Fujimura T et al. Treatment of human skin with an extract of Fucus vesiculosus changes its thickness and mechanical properties. J Cosmet Sci. 2002 Jan-Feb;53(1):1-9.