To reap the benefits of sunlight, how much time should the skin be exposed to direct sunlight?

Question

And how long until the sunlight becomes harmful?

Answer 1

they say to absorb the benefecial vitamin D from the sun, all we need is about 15 minutes a day
more than that can be harmful

Answer 2

realy depends on the skin type and colouring if your fair and burn easy wear skin block til you have a bit of tan and yes fair skin tans with skin block