Bio-active microalgae shield skin from the damaging effects that the chronic stress hormone, cortisol, has on skin. The cortisol hormone is a response to inner stress and a key contributor to premature ageing through its ability to damage the integrity and structure of skin cells. In turn, this leads to barrier depletion, dryness, redness, visible signs of fatigue, dullness, loss of firmness and lines and wrinkles. Excess cortisol can compromise skin’s ability to repair at night, and therefore by shielding cells from inner stress signals, microalgae restores the circadian rhythm.. Skin repair is optimised and balance is restored, increasing skin hydration and reducing signs of fatigue and stress for an energised, well-rested and refreshed appearance.