A woman with long brown hair smiles with her eyes closed. Sunlight filters through blinds, casting striped shadows across her face—her radiant glow a testament to her live probiotic skincare routine.

The Vitamin D You Can’t Get From a Pill

Most people know that sun exposure produces vitamin D. Fewer people know that vitamin D is only part of what it produces, and that the supplement industry has built an…

Split image: On the left, a woman in a straw hat looks at the ocean on a sunny beach. On the right, a woman in a white jacket gazes at snowy mountains under a bright sky—reminding us to consider the causes of accelerated ageing.

Your Skin Doesn’t Take Time Off

Holidays are supposed to be restorative. For you, perhaps. For your skin, the reality is more complicated. Different UV levels, a new climate, the drying effect of cabin air, and…