10 Indicators of Vitamin D Deficiency You Must Not Overlook – Page 2

4. Depression and Mood Swings

Low vitamin D levels have been linked to depression, especially in older adults. Some studies suggest that supplementing with vitamin D may improve mood and alleviate symptoms of depression. A meta-analysis of observational studies found a strong association between low vitamin D levels and increased risk of depression, highlighting its importance for mental health.

5. Impaired Wound Healing

Slow healing of wounds following surgery or injury can be a sign of vitamin D deficiency. The vitamin plays a critical role in skin regeneration and tissue repair. One study involving dental surgery patients found that healing was compromised in those deficient in vitamin D. Its anti-inflammatory and infection-fighting properties are also essential for proper wound healing.

6. Bone Loss and Osteoporosis

Vitamin D is vital for maintaining bone density and preventing osteoporosis. Deficiency can lead to decreased bone mineral density and increased fracture risk. A large observational study found a strong link between low vitamin D levels and bone loss in postmenopausal women.

7. Hair Loss

While hair loss is often linked to stress, nutrient deficiencies — including vitamin D — can also be a contributing factor. Some evidence connects low vitamin D levels to hair thinning, especially in women. Additionally, alopecia areata — an autoimmune condition that causes significant hair loss — has been associated with rickets, a condition caused by severe vitamin D deficiency.

8. Muscle Pain and Weakness

Vitamin D deficiency can lead to muscle weakness and pain in both children and adults. In one study, 71% of people with chronic pain were found to be deficient in vitamin D. This may be due to the presence of vitamin D receptors in nociceptors — the nerve cells responsible for sensing pain. The vitamin also plays a role in muscle strength and function through calcium regulation.

9. Weight Gain

Although the relationship is complex, some studies suggest that low vitamin D levels may contribute to weight gain and obesity. Vitamin D may influence how the body stores and processes fat. A study published in the American Journal of Clinical Nutrition found that women with insufficient vitamin D levels gained more weight over five years than those with adequate levels.