Vitamin D sends signals via a hormone made in fat cells to the brain centers that tells your stomach to stop eating. This satiety signal is what gives you the urge to stop eating a meal. The hormone that does the actual signaling is called Leptin. Studies at Aberdeen University in Scotland show those with low vitamin D have low Leptin. Those also with low vitamin D had less control of eating and higher obesity. This may be due to more obese subjects body mass that over absorbs vitamin D in body fat , so less availability of active vitamin D is in the blood.
A Canadian study showed that women with normal vitamin D levels had lower obesity rates as well. According to a Norweigian study more obese people may have less of a potential to convert inactive forms of vitamin D to active vitamin D thus causing an increased risk in obesity.
But, vitamin D seems to help the release of insulin the hormone that helps regulate absorption of glucose and helps balance fat.
As vitamin D helps you lose weight, the weight loss will turn back to help you improve vitamin D production.
It appears that vitamin D helps restore sugar balance, fat balance, helps control hunger, helps lose weight and reduces risk of type 2 diabetes.
This means the connection of insulin resistance( risk of type 2 diabetes), high blood sugar, high triglyderide fat, obesity and high blood sugar , all together which are known as the Cardio-Metabolic Syndrome could possibly be reduced with the use of vitamin D being present in one's diet.
References include:
Dr. Helen Macdonald, Aberdene University Dept. of Medicine and Therapeutics
Vitamin D Status of Women Living at Higher Latitudes in the UK in Relation to Bone Health, Overweight, Sunlight exposure and Dietary Vitamin D. Bone , 2008
