“Poor vitamin D absorption can be caused by underlying health conditions such as Crohn’s disease or cystic fibrosis as the intestines are directly affected and cannot absorb all the vitamin D from your food.
“Similarly, if you are overweight, high-fat levels can trap vitamin D. If you have symptoms of a deficiency, your doctor may recommend supplements, a vitamin-rich diet, or further testing.”
If you think you are deficient what should you do?
He advised seeking professional advice from your GP if you think you are deficient.
“They may recommend getting more sunlight by going outside, but vitamin D supplements are another excellent way to get your daily dose of vitamin D,” he said.