Gradually Darker and Stronger Hair with Alpecin Gray Attack Alpecin Gray Attack simply darkens your hair again step by step. Designed to enhance both the color and thickness of your hair, giving you the hair you've been missing. New Shampoo | New Hair With its unique simply darkens your hair again step by step - with a particularly natural color effect. Control Color | Control Effect Use daily for the first few weeks until desired result is achieved. Then alternate with normal shampoo to maintain the shade. New Science | New Effect Patent applied formula contains the ingredient 5,6 DHI which reacts with oxygen to form color pigments on your hair. This ingredient accumulates in the hair and reacts with atmospheric oxygen to form color pigments. Leave in for 2-5 minutes Simply lather into the scalp, leave for just 2-5 minutes & rinse off. Application time Control color intensity through application time. Longer application time intensifies the color effect. Frequency Control color intensity through frequency. Use daily for the first few weeks until desired result is achieved. Then alternate with normal shampoo to maintain the shade. Alpecin Gray Attack Caffeine & Color Shampoo Alpecin C1 Caffeine Shampoo Alpecin Caffeine Hair Booster Add to Cart Add to Cart Add to Cart Customer Reviews 3.3 out of 5 stars 282 4.2 out of 5 stars 686 4.4 out of 5 stars 114 Price $33.87 $ 33 . 87 $16.95 $ 16 . 95 $19.99 $ 19 . 99 Product Type Shampoo Shampoo Scalp Tonic Hair Type Gray, thinning hair Thinning hair All hair types Caffeine Complex ✓ ✓ ✓ Use Daily until preferred color is achieved Alternate shampoo when maintaining color Alongside shampoo routine