341. Acne, Rosacea or Pigmentation? You Need to Know About Azelaic Acid

This week on Expert, we’re diving deep into the multitasking skincare ingredient everyone’s talking about: azelaic acid. From pigmentation to rosacea, we cover what it does, how to layer it, and why it deserves a spot in your routine. Plus, we answer a listener’s question about how long it actually takes to see results from skincare — and what to expect along the way. Also: novelty toothpaste, a serious eyeliner situation, and a PSA on patience.