![Concentrated Retinol Serum 3](http://sperrinskincare.com/cdn/shop/products/Concentrated-Retinol-Serum-3_{width}x.jpg?v=1549572418)
Only use when acclimatised to Vitamin A (Skin EssentiA 5 or Youth EssentiA 4+) Only move to Serum 3 following 2 bottles of Serum 2.
Only use when acclimatised to Vitamin A (Skin EssentiA 5 or Youth EssentiA 4+) Only move to Serum 3 following 2 bottles of Serum 2.