Not my post you responded to, but during winter months in northern Europe, vitamin D in diet is recommended. http://norden.diva-portal.org/smash/get/diva2:7042

Not my post you responded to, but during winter months in northern Europe, vitamin D in diet is recommended. http://norden.diva-portal.org/smash/get/diva2:704251/FULLTEXT01.pdf http://norden.diva-portal.org/smash/get/diva2:704251/FULLTEX... Page 351.