Guides

Five free guides. Each one is written to be useful on its own, with sources at the end.

• Damaged Skin Barrier: a 14-Day Reset

  Signs your skin barrier needs a break, the 3-step reset routine and how to bring products back one at a time.

• The EU Retinol Limit (0.3%) Explained

  What Regulation (EU) 2024/996 changes: 0.3% in face products, 0.05% in body lotion, the vitamin A warning, and what it doesn't cover.

• How to Start Retinol: a Calm 12-Week Schedule

  How often to use retinol in weeks 1–12, how much to apply, what to pause and what's normal. A calm beginner schedule with sources.

• Retinol Purging or Breakout? How to Tell

  Purge or reaction? Where, when and what kind of spots, and what to do about each. With a simple flowchart.

• Vitamin C and Retinol: Can You Use Both?

  Yes, usually: vitamin C in the morning, retinol at night. When to drop one, and other common pairings explained.