If you thought Halle Berry’s eternal youth was solely down to good genes, you will be surprised to know that she is a firm believer in Ole Henriksen Truth Serum Collagen Booster (£40; www.selfridges.com), which is like a daily vitamin pill for your face. This high-powered vitamin C complex helps to smooth out wrinkles and prevents further damage. Packed with antioxidants, from green tea to vitamin E, it helps to fight off environmental aggressors. Its moisture-binding ingredients help to hydrate the skin, keeping it nourished and protected all day. This award-winning aromatic serum absorbs instantly into the skin, so there is no sign of greasy residue, and it penetrates to the deeper layer of the skin for long-term results. It is gentle enough for sensitive skin that is prone to irritation thanks to its skin-calming properties.