Using sunscreen or sunblock may lower your skin’s production of vitamin D. If you have any concerns regarding getting enough vitamin D, you should consider talking to your doctor to try any other approaches to getting the vitamin D you need.  There are better alternatives for you to get vitamin D, such as in the form of foods or vitamin supplements. These approaches are far less harmful to your skin, given that an extended amount of direct exposure to the sun increases your risk of getting skin cancer.