Protein or vitamin C deficiencies are contributing factors to necrotizing ulcerative gingivitis (NUG).These deficiencies commonly occur in nursing mothers and overweight older adults.

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The first statement is true; the second is false.Nutrient deficiencies,such as protein or vitamin C or B complex deficiency,are contributing factors to NUG because of lowered host resistance.These deficiencies commonly occur in young adults with poor eating habits (high kilocalorie and low nutrient intake)or those who rely primarily on convenience or fast food meals.

Protein or Vitamin C Deficiencies Are Contributing Factors to Necrotizing