10 Dangerous Symptoms of Vitamin D Deficiency By Amy J. Smith , Health Blogger & Cosmetologist - May 1, 2020 0 Symptom No. 9: Weight gain We need to keep up a sufficient consumption of vitamin D sources to maintain a balanced metabolism. Lack of vitamin D can orchestrate a slow metabolism function which can result in obesity or weight gain. Prev10 of 11NextUse your ← → (arrow) keys to browse