General Advice

Oily forehead and nose, dry or flaky cheeks, the same product rarely works on both. Here's how a dermatologist-informed combination skin routine treats each zone differently, with the specific actives that belong on oily areas versus drier ones, and why one moisturizer alone rarely covers a whole face.

Tight, flaky skin isn't always "dry" skin. Learn the real difference between dehydrated skin vs dry skin, why hyaluronic acid alone can fall short, and where ceramides fit into the routine.

Stinging serums, dull skin despite a full routine, and products that stop working are all signs of a damaged barrier. Here is how to identify it and repair it with /PHD/'s 1% Ceramides Barrier Repair Cream.

Stinging serums, dull skin despite a full routine, and products that stop working are all signs of a damaged barrier. Here is how to identify it and repair it with /PHD/'s 1% Ceramides Barrier Repair Cream.