A_557 - It's important to remember that your lifestyle should be aligned with your skin color: your sun exposure, in terms of time, should also depend on your skin color. To produce vitamin D, your skin must receive an amount of sun that depends not only on your skin color but also on your latitude. Using sunlamps or sunscreens to adjust the amount of sunlight your skin receives is a method that comes with costs, time spent on maintenance, and perhaps even side effects that we don't know about in the medium to long term... so it might be worth thinking about it a little...