Nutrient Deficiency Overview Table
Nutrition & Sports Nutrition Reference Tables
Nutrient Deficiency Overview Table
Selected findings can prompt assessment but cannot establish a nutritional diagnosis alone.
| Possible finding | Nutrient concern to consider | Other context |
|---|---|---|
| Persistent fatigue | Iron, energy and other possible inadequacies | Sleep, illness and training also matter |
| Bone stress injury | Energy availability, calcium and vitamin D | Mechanical and endocrine factors matter |
| Neurologic symptoms | B12 and other clinical possibilities | Requires timely medical assessment |
| Impaired wound healing | Protein, zinc, vitamin C and other factors | Disease and injury severity matter |
| Diet restriction | Multiple nutrient gaps | Review the actual pattern and reliable sources |
Nutrient Deficiency occurs when the usable supply of a nutrient is insufficient to maintain normal function, affecting related stores or functions. Causes include low intake, impaired absorption, increased losses or higher needs. One small meal alone does not diagnose deficiency.
Deficiency usually develops when usable supply fails to meet needs over time or absorption and utilisation are impaired. Stores may change before obvious symptoms appear. Eating little of one food on one day is not equivalent to diagnosing a bodily nutrient deficiency.
Nutritional status reflects intake, absorption, stores, and nutrient use over time. Assessment may combine dietary history, body changes, examination, and laboratory testing when appropriate. A symptom such as fatigue does not on its own establish a specific nutritional cause.
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