What is Redken Extreme Conditioner? An extreme strengthening conditioner, formulated with Redken's Strength Complex which contains Amino Acids and Arginine to strengthen and fortify the hair, and Citric Acid to condition and add smoothness. Using the full protein powered strength repair system with Extreme's Shampoo, Conditioner and Anti-Snap will help your hair to have a 73% decrease in breakage* and become 3x stronger. What are the benefits? One of Redken's bestselling products, this hair strengthening conditioner protects shine, repairs damaged hair and leaves it supple and shiny. Helps to fortify weakened hair leaving it supple and shiny.