"Vit.D3..made in the living cells in the epidermis..after e…

"Vit.D3..made in the living cells in the epidermis..after exposure to sunlight vitamin D3 remains in the skin even when the skin is washed with soap and water immediately after the exposure to sunlight" https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3897598/