AAFCS CFCS-HNFS study guide
AAFCS CFCS-HNFS · Work through your exam, one topic at a time.
The AAFCS Certified in Family and Consumer Sciences – Human Nutrition and Food Science (CFCS-HNFS) credential is a professional certification for family and consumer sciences educators and practitioners who specialize in nutrition and food science. It is designed for individuals who teach, coordinate programs, or work in community and educational settings where human nutrition, food safety, and food systems knowledge are central. The AAFCS CFCS-HNFS study guide has 8 sections and about 1,926 words.
01Nutrition Science and Nutrient Metabolism
Candidates must be fluent in macronutrient energy values (carbohydrate 4 kcal/g, protein 4 kcal/g, fat 9 kcal/g, alcohol 7 kcal/g), the distinction between essential and conditionally essential nutrients, and the logic of digestion and absorption: carbohydrates as monosaccharides via brush-border enzymes and SGLT1/GLUT transporters, proteins as amino acids and di/tripeptides via PepT1, and lipids packaged into chylomicrons that enter lymph before circulation. Know the roles of coenzymes (B vitamins), the fat-soluble vitamin absorption dependency on bile and micelles, and the basics of energy expenditure (BMR/RMR, thermic effect of food, activity).
313 words, about 2 min02Food Science and Food Safety
Understand food chemistry and preservation: water activity (aw), pH, temperature, and oxygen control microbial growth. Know the danger zone (40–140°F / 4–60°C), the temperature ranges for bacterial growth, and that aw below ~0.85 generally inhibits pathogen growth.
256 words, about 1 min03Human Growth, Development, and Nutrition Across the Lifespan
Trace nutrient needs across the life cycle. Infancy: exclusive breastfeeding or formula for about the first six months, introduction of complementary foods around six months, iron and zinc as key concerns, and vitamin D supplementation for breastfed infants.
262 words, about 1 min04Diet-Related Disease Prevention and Medical Nutrition Therapy
Distinguish primary prevention (population and lifestyle) from medical nutrition therapy (MNT) for diagnosed conditions. Know the nutrition care process (assessment, diagnosis, intervention, monitoring/evaluation) and the role of the registered dietitian nutritionist in MNT.
216 words, about 1 min05Food Systems, Sustainability, and Food Security
Understand the food supply chain from production through processing, distribution, retail, consumption, and waste. Distinguish food security (consistent access to sufficient, safe, nutritious food) from food safety and food sovereignty.
266 words, about 1 min06Community Nutrition, Health Promotion, and Program Planning
Know the program-planning cycle: needs assessment, goal and objective setting, intervention design, implementation, and evaluation. Distinguish goals (broad) from objectives (specific, measurable, achievable, time-bound).
214 words, about 1 min07Professional Practice, Ethics, and Communication
Understand scope of practice, credentialing, and professional standards. Know the principles of ethics: autonomy, beneficence, nonmaleficence, justice, and confidentiality.
181 words, under 1 min08Research, Evidence, and Data Literacy in Nutrition
Understand study designs (randomized controlled trials, cohort, case-control, cross-sectional, ecological), their strengths and biases, and the difference between association and causation. Know key terms: confounding, selection bias, measurement error, generalizability, statistical versus clinical significance, relative versus absolute risk, sensitivity/specificity, and p-values and confidence intervals.
218 words, about 1 min