If you've tried any skincare product and given up before at least four weeks have elapsed, you're not doing your skin a favour. Skin takes 28 days to renew, and in this time period, you can expect to see a dramatic transformation with the right product. Skin Inc's Skin Revival Infusion Serum is an intensive treatment that is handily divided into four vials for easy use — just apply one per week for ultimate freshness. The new packaging is a sleek, silver dropper bottle inspired by the brand's iconic My Daily Dose. It contains Uttwiler Spätlauber apple extract — a fruit that can stay fresh for up to four months. It has remarkable regenerative properties that translates to a potent anti-ageing ingredient for your skin.

Use this whenever you need a skin boost (as a booster serum), or as a one month intensive anti-ageing treatment. The results are deeply hydrating and this is actually a godsend for very dry or eczema-prone skin. It also improves signs of age, including fine lines and wrinkles.

$318. At Skin Inc stores