| 
Nutrients | 
Deficiency | 
Excess | 
  | 
Carbohydrates | 
Low energy | 
Diabetes, obesity | 
  | 
Fats | 
None | 
Cardiovascular
  disease, obesity | 
  | 
Cholesterol | 
none | 
Cardiovascular disease | 
  | 
Protein | 
Kwashiorkor 
(edema, anorexia,
  inadequate growth) | 
Rabbit starvation
  (diarrhoea, headache, low BP, low heart rate 
Discomfort/hunger that
  can only be satisfied by eating fats and carbohydrates | 
  | 
Sodium | 
Hyponatremia 
(electrolyte
  imbalance) | 
Hypernatremia,
  hypertension | 
  | 
Iron | 
Anaemia | 
Cirrhosis (chronic
  liver disease), heart disease | 
  | 
Iodine | 
Goitre, hypothyroidism | 
Iodine toxicity | 
  | 
Vitamin A | 
Night blindness, Xeropthalmia
  (dry eyes) | 
Hypervitaminosis A
  (birth defects, liver problems, osteoporosis) 
 | 
  | 
Vitamin B1 | 
Beri-beri |  | 
  | 
Vitamin B2 | 
Cracking of skin |  | 
  | 
Vitamin B12 | 
Pernicious anaemia |  | 
  | 
Niacin (Vitamin B3) | 
Pellagra (diarrhoea,
  dermatitis, dementia, death) | 
Dyspepsia
  (indigestion), cardiac arrhythmias | 
  | 
Vitamin C | 
Scurvy | 
Diarrhoea | 
  | 
Vitamin D | 
Rickets | 
Hypervitaminosis D
  (dehydration, vomiting, constipation) | 
  | 
Vitamin E | 
Nervous disorders | 
Hypervitaminosis E
  (anticoagulant) | 
  | 
Vitamin K | 
Haemorrhage |  | 
  | 
Calcium | 
Osteoporosis | 
Fatigue, vomiting,
  depression, cardiac arrhythmias | 
  | 
Magnesium | 
Hypertension | 
Weakness, nausea,
  vomiting | 
  | 
Potassium | 
Hypokalaemia, cardiac
  arrhythmias | 
Hyperkalaemia,
  palpitations | 
 
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