The best way to keep your hands of from looking too much aged is by protecting it from all external factors. Your hands are the most exposed part of your body and it needs greater protection. According to dermatologist and nail specialist Dr. Dana Stern, a moisturizer that has got an SPF of at least 30 and broad spectrum protection, should be a part of your daily routine. Why so? Because this contains a formula that has zinc oxide, and titanium oxide which prevent the damaging UV rays from affecting your hands physically.