of course u don't need a drop of sunscreen even in your a**hole. you need at least half an hour daily sun exposure to your head, arms, torso at least for vitamin D which is the FATHER of all vitamins and has multiple health benefits from strengthening bones, boosting immunity, fighting cancer etc etc
Nice of Rediff to spread consumer awareness on products available in the market place. Every product worth its salt screams that it is the best available but as we read from your report its contrary to what they say and in some cases the price is exhobirant. Nice to know which sunscreen is best for a Indian Summer..
Your next target should be the shampoo, soap and the array of whitning creams...god only know which work and which dont.