Nutrition and Lifestyle Counseling
What this domain tests
This domain covers nutrient roles in hair and skin, dietary assessment, behavior-change counseling, and the limits of your scope. Expect questions on deficiencies, supplement risk, and counseling technique.
Core rules and concepts
- Hair is protein: adequate protein, iron (ferritin), zinc, and vitamin D support normal growth. Deficiency can produce telogen effluvium.
- Biotin caution: evidence for benefit in people without deficiency is weak, and high doses interfere with immunoassays such as troponin and thyroid tests.
- Counseling frameworks: motivational interviewing - open questions, affirmations, reflective listening, summarizing - supports change better than instruction alone.
- Lifestyle factors: sleep, stress, smoking (vasoconstriction), crash dieting, and tight hairstyles all affect hair.
- Scope: educate and coach; do not prescribe therapeutic diets for disease without the appropriate qualification.
Worked example
A client reports diffuse shedding with no scalp disease, a recent crash diet, and heavy menses. Reasoning: the pattern fits telogen effluvium driven by iron deficiency and caloric restriction. Plan: refer for ferritin and CBC, counsel on protein and iron-rich foods paired with vitamin C, and avoid promising a regrowth date, because the hair cycle takes months to recover.
Traps that cost marks
- Recommending megadose biotin without indication.
- Ignoring supplement interference with lab tests.
- Making medical claims beyond your scope.
- Promising timelines that ignore the hair growth cycle.