This ingenious formula, which includes keratin, caffeine and other key nutrients, helps to strengthen hair by penetrating the hair shaft with moisture to improve its elasticity, meaning it is less brittle and therefore less susceptible to breaking. This is some seriously clever science in a tube! Consumer panel testing on 100 people showed a significant increase in the perception of less breakage after four weeks used with give me strength strengthening conditioner, with 82% of people agreeing they saw less visible breakage and 87% agreeing their hair felt stronger.