Product

The Ordinary Caffeine Solution 5% + EGCG

No eye product erases genetics or sleep debt, and anyone promising otherwise is selling you the jar. What a well-formulated caffeine serum can do is reduce morning puffiness and modestly brighten the look of circles with consistent use — and this one does, for under £10.

Set expectations accordingly: it is a sharpener, not a cure. The cure is in the sleep chapter.