(WHAS11) -- How much weight you gain may be directly related to how much time you spend outside.
Vitamin D is often called the "sunshine vitamin" because most of us get our vitamin D from the sun. It helps maintain our bones and muscles.
New research shows that women are not getting enough of the vitamin and it could be why they are gaining weight.
Scientists say since the vitamin's main source is sunlight and those lacking in it may not spend enough time outdoors.