A magnesium-based system suitable for use in skincare comprises (a) a first magnesium source in the form of a progressive-release oral tablet exhibiting in vitro, after 2h in 0.1N HCl medium, a rate of dissolution (delta) of the magnesium contained therein of less than or equal to 60% by weight relative to the total weight of the Mg provided by the first magnesium source, and (b) a second magnesium source in a topical preparation. A method for treating skin for stress, fatigue or skin barrier deficiencies, as well as for stratum corneum hydration, includes orally and topically administering magnesium sources (a) and (b), respectively.
