DEAR DR. ROACH: I walk outside almost every day for at least an hour. I cover myself from head to toe -- long pants and long sleeves, with the backs of my hands covered and a wide-brimmed hat with a bandanna covering my neck and lower chin. With sunglasses on, ready to go, my husband jokes that I look like I am going to rob a bank! But after numerous skin cancers, I do not want any sun. Therefore, the only skin exposed to the sun is on my 10 fingers. Is that enough exposure to get a daily dose of vitamin D? -- J.P.