Ouch! I was about 14, and forsook "My son, hear the instruction of thy father, and forsake not the law of thy mother" (Proverbs 1:8) in (among other things) not "covering up" after about 25 minutes in the sun as I was exhorted to. For I wanted to be like my friends from the dairy bar where i worked, and just stayed out for the whole time they did.
As a result my legs were so badly burned that I vomited that night, and could not walk, and had a blister on one ankle the size of a tennis ball and one the size of a golf ball in the other, with sheets of skin coming off my back. Doc said I had 2nd degree burns and that my skin would not be normal for 6 months. Praise God I came thru it all though.
About the only tan i get is to some degree on my arms and back of my neck in the summer, but the early days of spring and summer is when we need to be most careful. My Mom got skin cancer on her back when she was in her 70's, but thank God they got is all out and she died at about 93.
The next day, I was heavily burned, and arms swollen like sausages. That was my last day light exposure of longer than 20 minutes. Been taking Vit D3 ever since. I prefer to be tanned, but I am what I am, so I just go around being my natural pale face.
I take some old D3 also, though you are sppsd to take it with K2.
Yes, I do take Vit. k2 along with other stuff. I make sure to get the Calcium, D3, K2, Vit. C in at least the 100% daily doses. Take a multi vitamin every other day—it’s a high potency and has way more than the minimum required doses.