Biological Variation, Individual

**Definition:** Differences in measurable biological values, characteristics, or traits, within one individual under different conditions for the individual such as fasting, season of the year, age, or state of wellness.

**Tree numbers:** - G16.115

**Synonyms:** - Intra-Individual Biological Variation - Within-Person Variation - Within-Subject Variation - Within-Individual Biological Variation - Biological Variation, Within-Individual