CCN study guide
CCN · Work through your exam, one topic at a time.
The Certified Clinical Nutritionist (CCN) credential is issued by the Clinical Nutrition Certification Board (CNCB), a 501(c)(3) non-profit certification agency based in Plano, Texas, that provides professional training, examination, and certification for health care practitioners. The CCN assessment focuses on human clinical nutrition, which applies principles from current biochemical and physiological science to promote optimal health while recognizing biochemical individuality. The CCN study guide has 5 sections and about 2,013 words.
01Clinical Nutrition Assessment
This domain covers the data-gathering half of practice: anthropometrics, laboratory values, clinical signs, dietary intake, and medication/supplement history. The exam rewards candidates who integrate all streams rather than anchoring on one abnormal lab.
426 words, about 2 min02Nutrition and Lifestyle Modification
This domain tests whether you can convert assessment findings into a plan a real person will follow. Expect questions on behaviour-change stage, counselling technique, dietary pattern selection, and quantified lifestyle targets.
411 words, about 2 min03Nutritive Supplementation
Supplement questions reward a disciplined recommendation: indication, form, dose, timing, and stop rule. Candidates who jump to a product name without an indication lose marks.
406 words, about 2 min04Physiological and Biochemical Pathways
This domain tests the mechanistic base beneath clinical decisions: how fuel becomes ATP, how one-carbon metabolism links B vitamins to methylation, how biotransformation phases handle xenobiotics, and how fatty acid balance shapes inflammation. Glycolysis nets 2 ATP and 2 NADH per glucose; pyruvate dehydrogenase (thiamine-dependent) feeds acetyl-CoA into the TCA cycle, which yields NADH/FADH2 for oxidative phosphorylation, roughly 30–32 ATP per glucose.
383 words, about 2 min05Regenerative Processes
This domain addresses tissue repair: wound healing, bone remodelling, muscle protein synthesis, and gut mucosal renewal. The exam tests sequencing and substrate priorities, so candidates must know when nutrition supports repair and when it cannot compensate for poor perfusion, offloading, or drugs.
387 words, about 2 min