SUNSCREEN.....No I'm not going into the explanations or the the differences as there are so many and I mean a ton of explanations on these things out there. I will just point a few things that one needs to keep in mind at the thought of sunscreen. I never wore sunscreen and had bad skin throughout my life as there were too many responsibilities to shoulder and no one to explain such details frankly. FRankly, it was only after I got married, I took care of myself and was able to reverse most damage. Of course, hormonal issues and health issues can affect our body but such things might help us age gracefully, if that makes any sense.But in this day and age of the internet...its a blessing we can gather so much info and arm ourselves with basic knowledge and know what to choose...on what basis to choose and how to defend our skin and everything else under the beautiful sun. SPF 30 is okay for normal days but if you plan to be by the beach...its better to opt for SPF 50....