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MSD Manual
Consumer Version
HEALTH TOPICS
HEALTHY LIVING
SYMPTOMS
EMERGENCIES
RESOURCES
NEWS
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Disorders of Nutrition
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Vitamins
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Vitamins
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Overview of Vitamins
Fat-soluble vitamins
Water-soluble vitamins
Causes
Folate Deficiency
Causes
Symptoms
Diagnosis
Prevention and Treatment
Niacin Deficiency
Causes
Symptoms
Diagnosis
Treatment
Niacin Excess
Riboflavin Deficiency
Causes
Symptoms
Diagnosis
Prevention and Treatment
Thiamin Deficiency
Causes
Symptoms
Dry beriberi
Wet beriberi
Brain abnormalities
Infantile beriberi
Diagnosis
Treatment
Vitamin A Deficiency
Causes
Symptoms
Diagnosis
Prevention
Treatment
Vitamin A Excess
Symptoms
Diagnosis
Treatment
Vitamin B6 Deficiency
Causes
Symptoms
Diagnosis
Treatment
Vitamin B6 Excess
Symptoms
Diagnosis
Treatment
Vitamin B12 Deficiency
Causes
Inadequate consumption
Inadequate absorption
Inadequate storage
Symptoms
Diagnosis
Prevention
Treatment
Vitamin C Deficiency
Causes
Scurvy
Symptoms
Diagnosis
Prevention
Treatment
Vitamin C Excess
Vitamin D Deficiency
Causes
Inadequate exposure to sunlight
Other causes
Symptoms
Diagnosis
Prevention
Treatment
Spotlight on Aging: Vitamin D Deficiency
Vitamin D Excess
Symptoms
Diagnosis
Treatment
Vitamin E Deficiency
Causes
Symptoms
Diagnosis
Treatment
Vitamin E Excess
Symptoms
Diagnosis
Treatment
Vitamin K Deficiency
Causes
Symptoms
Diagnosis
Treatment
Vitamin K Excess