We don’t know much about mountaineering, but we do know that it takes will, concentration and strong legs. Yes, a good skeleton. For those who want to strengthen their bones, we’ve combined D3 with K2 (the vitamin, not the mountain) to help you get through your next expedition (or walk down the street when you go shopping). Vitamin D increases the absorption of calcium and vitamin K helps transport it to the bones. Together they help maintain normal bone and muscle function. So get out your ice axes, tent and oxygen – here come strong mountaineering bones!