Linked from

The 33 pages that link to Vitamin D, each with the reason it gives.

• Dietary supplementBroader topic: Vitamin D supplements can address deficiency, but routine use depends on individual needs.

• CholesterolBroader topic: The skin makes vitamin D from 7-dehydrocholesterol, a cholesterol precursor.

• Multiple sclerosisRelated: Low levels are associated with increased risk, though their causal role is not fully settled.

• MelaninRelated: Skin pigmentation affects how much ultraviolet radiation reaches the processes that produce vitamin D.

• Lactose intoleranceRelated: Dairy avoidance can also reduce intake when fortified milk is a dietary source.

• UltravioletRelated: UVB initiates vitamin D production in human skin.

• Vitamin ACompared with: It shares fat solubility with vitamin A but has different principal functions and deficiency effects.

• SteroidRelated: Vitamin D is made from a cholesterol-related precursor after ultraviolet exposure.

• Seasonal affective disorderRelated: Low winter levels have been studied as a possible contributor, but their causal role remains unsettled.

• MicronutrientBroader topic: Vitamin D illustrates how a micronutrient can also act through hormone-like signaling.

• Ascorbic acidCompared with: Its fat solubility and hormone-like actions contrast with ascorbic acid's water solubility and redox chemistry.

• Vitamin KCompared with: Both vitamins are linked to bone health, but only vitamin K activates clotting proteins.

• OsteomalaciaRelated: Deficiency is a common cause of inadequate mineral supply in osteomalacia.

• VitaminBroader topic: Its distinctive production in skin links nutrition with sunlight exposure.

• Vitamin ECompared with: Its main physiological role differs from vitamin E's antioxidant function.

• Fat-soluble vitaminBroader topic: Its production in skin and role in mineral balance distinguish it from the other three.

• Cow's milkRelated: Many countries fortify cow's milk with vitamin D to support calcium absorption.

• HypocalcemiaRelated: Deficiency can reduce intestinal calcium absorption enough to lower blood calcium.

• RicketsRelated: Deficiency is the most common cause of rickets because it impairs mineral availability for growing bone.

• Ultraviolet indexRelated: UV exposure can support vitamin D production, creating a trade-off with skin damage.

• SterolRelated: Ultraviolet light converts a cholesterol-related skin precursor into vitamin D3.

• Parathyroid glandRelated: The hormone stimulates renal activation of vitamin D, increasing intestinal calcium absorption.

• Ultraviolet-BRelated: Ultraviolet-B initiates vitamin D production in skin by converting 7-dehydrocholesterol.

• Sun protectionCompared with: Sunlight helps the body produce vitamin D, creating a balance considered in protection advice.

• Calcium gluconateRelated: Low vitamin D can contribute to deficiency that calcium supplementation alone may not correct.

• CholecalciferolNarrower topic: Cholecalciferol is one member of this broader vitamin group.

• Elmer McCollumBroader topic: McCollum’s experiments distinguished the antirachitic factor from vitamin A in cod-liver oil.

• SunlightRelated: Ultraviolet B in sunlight enables vitamin D production in human skin.

• Adolf WindausRelated: Windaus’s sterol studies helped identify vitamin D’s chemical relationship to cholesterol.

• Itai-itai diseaseRelated: Kidney damage can disrupt vitamin D activation, worsening bone disease.

• ErgocalciferolNarrower topic: Ergocalciferol is one member of this broader vitamin group.

• Bone (anatomy)Related: Adequate vitamin D enables normal mineralization of bone.

• PogonaRelated: Its production and dietary availability matter for healthy Pogona bone development.