Dermalogica Biolumin-C Serum

This skincare product in a 30 ml size is Dermalogica Biolumin-C Serum. Skincare works on a schedule of weeks rather than days — most formulas need consistent use before there is anything to see. Patch test on the inner arm or along the jaw first, especially if you are already using retinoids, acids or vitamin C. A discounted listing is only a saving if it is the same size and edition as the one beside it. Check the period-after-opening symbol on the pack; once opened, a formula is on a shorter clock than the printed expiry. Whoever is cheapest today may not be tomorrow, so it is worth looking again before settling on the best deal.