Fat Soluble Vitamins (Deficiency)

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  1. Vitamin A
    Slow recovery of vision after flashes of bight light at night is the first ocular symptom; can progress to xeropthalmia and blindness

    Bone growth ceases; bone shape changes; enamel-forming cells in teeth malfunction; teeth crack and tend to decay

    Skin becomes dry, scaly, rough, and cracked; keratinization or hyperkeratosis develops; mucous membrane cells flatten and harden: Eyes become dry (Xerosis); irreversible drying and hardening of the cornea can result in blindness

    Decreased saliva secretion-> difficulty chewing, swallowing-> anorexia

    Decreased mucous secretion of the stomach and intestines-> impaired digestion and absorption-> Diarrhea, increased excretion of nutrients

    Impaired immune system functioning-> increased susceptibility to respiratory, urinary tract, and vaginal infections diseases
  2. Vitamin D
    Rickets: (In infants and children) Retarded bone growth, bone malformations (Bowed legs), enlargement of ends of long bones (knock-knees), deformities of the ribs (bowed with beads or knobs), delayed closing of the fontanel-> rapid enlargement of the head, decreased serum calcium and/or phosphorous, malformed teeth; decayed teeth, Protrusion of the abdomen related to relaxation of the abdominal muscles, increased secretion of parathyroid hormone

    Osteomalacia: (In adults) softening of the bones-> deformities, pain, and easy fracture, Decreased serum calcium and/or phosphorous, increased alkaline phosphatase, involuntary muscle twitching or spasms
  3. Vitamin E
    Increased red blood cell hemolysis

    In infants, anemia, edema, and skin lesions
  4. Vitamin K
Card Set
Fat Soluble Vitamins (Deficiency)
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