Beauty buzzwords such as "collagen-boosting" and "paraben-free" sound reassuringly scientific, something beauty brands have capitalised on in the fierce battle to win customers. But, on a scale of one to 10, how accurately could you describe the purpose of collagen in our skin, the chemical formulas of sulphates or the scientific benefit of antioxidants? If your answer is above seven, you are either a trained scientist or just plain cheating. It's time to learn what the buzzwords mean.