![Concentrated Retinol Serum 2](http://sperrinskincare.com/cdn/shop/products/Concentrated-Retinol-Serum-2_{width}x.jpg?v=1549572340)
Only use when acclimatised to Vitamin A (Skin EssentiA 5 or Youth EssentiA 4+) Only move to Serum 2 following 2 bottles of Serum 1.
Only use when acclimatised to Vitamin A (Skin EssentiA 5 or Youth EssentiA 4+) Only move to Serum 2 following 2 bottles of Serum 1.