Biotherm Biosource Hydrating & Tonifying Toner, 13.52 oz / 400 ml

Biotherm Biosource Hydrating & Tonifying Toner, 13.52 oz / 400 ml is a skincare product. Active ingredients can be effective and irritating at the same time, which is why the usual advice is to introduce one at a time. Start with a small amount every other day and build up frequency once your skin has settled. Discounted listings come and go, and rarely at the same shop twice. Keep the lid closed and the pack out of direct sun — light and air degrade most actives faster than time does. The best deal and the cheapest sticker price are not always the same listing once delivery is counted.