White spots on the skin
are not usually caused by a vitamin deficiency alone. Although nutritional deficiencies can affect skin pigmentation, several much more common skin conditions can produce
pale or white spots.
Possible nutritional links
- Vitamin B12 deficiency: Can occasionally be associated with changes in skin pigmentation, but isolated white spots aren’t a typical diagnostic sign.
- Vitamin D deficiency: Very common, but it doesn’t usually directly cause white spots on the skin.
- Folate or other nutritional deficiencies: Severe nutritional problems can cause various skin changes, but they aren’t a common explanation for sharply defined white patches.
More common causes of white spots
- Vitiligo: An autoimmune condition in which pigment-producing cells are destroyed, producing well-defined white patches.
- Tinea versicolor: A superficial fungal infection that can cause lighter patches, often with fine scaling.
- Idiopathic guttate hypomelanosis: Small, smooth, pale spots, particularly on sun-exposed arms and legs, often becoming more common with age.
- Post-inflammatory hypopigmentation: Skin may become lighter after eczema, an injury, or another rash.
What should you do?
Don’t start high-dose vitamins simply because you have white spots. A clinician or dermatologist can examine the spots and determine whether testing for deficiencies is appropriate.
If the patches are rapidly spreading, completely white, scaly, itchy, or associated with hair losing its pigment, getting them examined is particularly worthwhile.
