You need to first remember that you cannot prevent your skin from ageing, what you can achieve at best is to prevent visible signs of ageing with a healthy skincare ritual and a good balanced diet. If all else fails, it is always safest to seek advice and treatment from experienced dermatologists instead of risking damage with over-the-counter products. These products cannot help you ascertain how your skin may react if used or how to deal with your specific need based on your skin type or genetics. These are assessments only a trained dermatologist can do. Do not EVER risk your skin to the untrained tubes and jars of lotions and creams.