place before noon. You can also use vitamin D supplements. Advances in current research suggest that the average adult needs to take 8000 IU of vitamin D daily to raise levels above 40 ng ml, which is the minimum required for disease prevention. 7. Make sugar your enemy! levels decrease after ingestion of sugar. Indeed, sugar raises insulin levels which is another factor leading to low levels. The US Department of Agriculture (USDA) estimates that the average American consumes teaspoons of sugar per day, consuming two tons of sugar throughout his life! When we think of our ancestors who did not consume at all ... except the one coming from the berries and fresh natural fruits. Amazing! Do not be .