La Roche-Posay Thermal Spring Water

What you are looking at is La Roche-Posay Thermal Spring Water, a skincare product in a 300 ml size. Active ingredients can be effective and irritating at the same time, which is why the usual advice is to introduce one at a time. Patch test on the inner arm or along the jaw first, especially if you are already using retinoids, acids or vitamin C. Whether it is discounted this week says more about the shop's stock than about the product. Follow with SPF in the morning: plenty of active ingredients leave skin more sensitive to sunlight than usual. Whoever is cheapest today may not be tomorrow, so it is worth looking again before settling on the best deal.