| Course | NS465 Functional Nutrition |
|---|---|
| Unit | Unit 7 |
| Paper type | Protocol critique |
| Length | About 890 words, 6 pages double-spaced |
| Format | APA 7 student paper |
| School | Purdue University Global |
| Program | BS in Nutrition Science |
| Updated | October 2026 |
Free sample paper for NS465 Unit 7
Grading Each R on Its Own: A Unit 7 Protocol Critique of the Five-Step 5R Gut Protocol
[Student Name]
Purdue University Global
NS465: Functional Nutrition
Unit 7 Protocol Critique
[Instructor Name]
[Date]
The critique and its grades are the student's own; the dietary network meta-analysis, the probiotic meta-analysis and the glutamine trial cited are real.
Why Grade the Steps Separately
The 5R protocol is usually presented as a package for digestive complaints, from bloating to irritable bowel syndrome. Packages are hard to evaluate. If a client improves, any one step, or none, may deserve the credit. Grading each step on its own evidence shows which parts a practitioner can defend and which are borrowed authority. The grades used here are: supported by controlled trials for a defined group; plausible from mechanism with limited trials; and not testable as usually stated.
Remove
The first step removes foods, organisms or substances thought to irritate the gut. In practice it often means elimination diets, and sometimes antimicrobial herbs.
For dietary removal in irritable bowel syndrome, the evidence is strongest for the low FODMAP diet. In a network meta-analysis of 13 randomized trials with 944 patients, it ranked first among diets for improving global symptoms, abdominal pain and bloating (Black et al., 2022). That is a specific, defined removal tested in a defined group. Broad removal lists based on food sensitivity tests, or antimicrobial herb protocols aimed at unproven overgrowth, do not share that support.
Grade: supported when it means a defined diet such as low FODMAP for irritable bowel syndrome; weak when it means broad or test-based removal.
Replace
The second step adds digestive enzymes, stomach acid supplements or bile acids, on the theory that digestion is incomplete. Specific enzyme replacement is well established for diagnosed conditions such as pancreatic insufficiency, and lactase helps people with lactose intolerance. For general digestive complaints in people without a diagnosed deficiency, controlled evidence is thin.
Grade: supported for diagnosed deficiencies; mechanism only for routine use.
Reinoculate
The third step adds probiotics, and sometimes prebiotic fibers. A meta-analysis of 53 randomized trials with 5,545 patients with irritable bowel syndrome found that some combinations and strains appeared to help global symptoms and abdominal pain, but which ones work remained unclear (Ford et al., 2018).
Reinoculate has more trial evidence behind it than most of the protocol, yet that evidence cannot tell a practitioner which product to choose, which is exactly the decision the step asks them to make.
Grade: plausible with some trial support; not specific enough to guide a product choice.
Repair
The fourth step uses nutrients such as glutamine, zinc or collagen to "heal the gut lining." The strongest single trial found that in people who developed irritable bowel syndrome with diarrhea after an infection and who had increased intestinal permeability, glutamine for eight weeks improved symptoms and normalized a permeability test far more often than placebo (Zhou et al., 2019). That is a striking result in a narrow group. It does not show that glutamine repairs the gut in people without measured permeability, or that collagen or bone broth do anything similar.
Grade: supported in one defined group by one trial; mechanism only for most uses.
Rebalance
The fifth step addresses sleep, stress, exercise and relationships. Few would argue against better sleep or less stress, and both can affect digestion. But "rebalance" names no specific action, dose or outcome. A practitioner cannot test whether a client has been rebalanced, and a study cannot measure it as defined.
Grade: not testable as usually stated. Specific actions within it, such as a sleep schedule, could be tested on their own.
The Order of the Steps
The protocol presents the five steps as a sequence, with removal first and rebalancing last. No trial has tested whether that order matters, or whether doing all five steps beats doing the single most relevant one. A client with irritable bowel syndrome and diarrhea might gain most from a structured low FODMAP trial alone, while another might need nothing beyond better sleep and meal timing. Treating the sequence as fixed can add cost and complexity without adding benefit.
What the Grades Add Up To
Two steps, remove and reinoculate, have meaningful trial support when narrowly defined. Repair has one promising trial in a specific group. Replace is supported only where a deficiency has been diagnosed. Rebalance is a reasonable idea phrased too loosely to evaluate. The protocol as a whole has never been tested as a package in a controlled trial, so its overall effect is unknown.
Implications for Practice
A practitioner using the 5R framework should be able to say, for each step, what specific action is planned, for what diagnosis or finding, and on what evidence. "Remove" should become a named diet with a reintroduction plan. "Reinoculate" should name a strain studied for the client's condition, or admit uncertainty. "Repair" should be reserved for situations resembling the trial evidence. Clients with alarm features, such as weight loss, bleeding or symptoms starting after age 50, should see a physician before any of it.
Limits of This Critique
This critique uses selected high-quality sources rather than a full systematic review of each step, and evidence is changing. Protocols differ between practitioners, so a version of 5R may be more or less defensible than the general form critiqued here.
References
Black, C. J., Staudacher, H. M., & Ford, A. C. (2022). Efficacy of a low FODMAP diet in irritable bowel syndrome: Systematic review and network meta-analysis. Gut, 71(6), 1117-1126. https://doi.org/10.1136/gutjnl-2021-325214
Ford, A. C., Harris, L. A., Lacy, B. E., Quigley, E. M. M., & Moayyedi, P. (2018). Systematic review with meta-analysis: The efficacy of prebiotics, probiotics, synbiotics and antibiotics in irritable bowel syndrome. Alimentary Pharmacology & Therapeutics, 48(10), 1044-1060. https://doi.org/10.1111/apt.15001
Zhou, Q., Verne, M. L., Fields, J. Z., Lefante, J. J., Basra, S., Salameh, H., & Verne, G. N. (2019). Randomised placebo-controlled trial of dietary glutamine supplements for postinfectious irritable bowel syndrome. Gut, 68(6), 996-1002. https://doi.org/10.1136/gutjnl-2017-315136
The Purdue Global NS465 Unit 7 instructions
The seventh NS465 unit asks students to critique a functional nutrition protocol using published evidence. Prompts typically name the protocol and ask for a structured evaluation and implications for practice. Explain why you will evaluate the parts separately. Define a simple grading scale before applying it. For each step, describe what it usually involves in practice, then report the best evidence with study sizes and populations. Distinguish defined, testable versions of a step from vague ones. Note where evidence exists only for a narrow group. Consider whether the protocol as a whole has been tested. Draw implications for how a practitioner should use or adapt it, including referral for warning signs. State the limits of your own critique. Most critiques run four to six pages.
Inside the NS465 Unit 7 example
The sample begins by explaining why packages resist evaluation and defines three grades. Remove is split into the low FODMAP diet, with its network meta-analysis, and broad test-based removal. Replace separates diagnosed deficiencies from routine enzyme use. Reinoculate reports the 53-trial probiotic meta-analysis, and a highlighted sentence explains why that evidence cannot guide product choice. Repair reports the glutamine trial's dramatic but narrow result. Rebalance is graded untestable as stated. A section questions the fixed order of the steps. The summary tallies the grades and notes that the package is untested. Implications turn each step into a specific, defensible action, with referral for alarm features, and the critique ends with its own limits.
NS465 Unit 7 rubric: what earns full points
Protocol critiques are usually evaluated on fair representation of the protocol, accurate evidence, a consistent grading approach and useful implications. Most credit tends to depend on grading each component on its own evidence instead of judging the protocol as a whole. Instructors reward accurate reporting of trial populations, since a result in one group does not transfer to all. Distinguishing defined actions from vague ones shows analytical skill. Recognizing that a package can be untested even when parts are supported earns credit. Implications should help a practitioner act more defensibly. Admitting the critique's limits shows rigor. A heading for each R, plus a correct APA 7 list, finishes the critique.
NS465 Unit 7 help: mistakes that cost points
Many 5R critiques either endorse the whole protocol because one step has evidence or reject it all because another does not. Writers often cite studies without saying who was studied. Vague steps are graded as if they were specific treatments. The fact that no one has tested the package is overlooked. Implications stay general, such as use with caution. Referral for warning signs is missing. Sources come from practitioner websites rather than trials. If you have a protocol to critique but find the evidence scattered, our team can help you grade each step on its own studies and draw practical conclusions.
Get an NS465 Unit 7 example written to your instructions
Share the protocol assigned in Unit 7, the published version or handout you were given, and the rubric. Each component is graded against the same stated criteria, supported parts credited and undefined claims named, with a summary table of grades. A first sample is free of charge and ready in 24-48h, sources dated throughout. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.
More NS465 papers and BS in Nutrition Science samples
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- NS465 Unit 6: Yeast Belief Case Narrative
- NS465 Unit 8: Referral Decision Memo
- NS465 Unit 9: Eating Pattern Plan
- NS465 Unit 10: Functional Case Study
- NS460 Unit 7: Ashwagandha Botanical Case Study
- NS455 Unit 7: Sugar Substitute Bibliography
- NS420 Unit 7: DAP Client Case Note
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NS465 Unit 7 questions, answered
What if the protocol has never been tested as a whole?
That is common and worth stating as a finding. Grade the components where evidence exists, then say the combined protocol lacks direct testing, which means its overall effect is unknown even if some parts are supported. Avoid inferring that a bundle works because its pieces do, since interactions and adherence can change the result considerably.
Can I critique a protocol from a practitioner's website?
Yes, if it is the protocol your prompt assigns or allows. Cite the specific page and date, quote the protocol accurately, and describe it as its authors do before evaluating it. A practitioner's website is a primary source for what the protocol claims, but never for evidence that it works; for that, go to published research.
How harsh should the grades be?
As harsh as the evidence warrants and no harsher. A step with trial support in a defined condition deserves credit, even where the protocol oversells it. A step resting only on mechanistic reasoning should be graded as such, with the mechanism described fairly. Consistency matters more than severity: apply identical criteria to every step and let the grades differ where the evidence does.
Where can I find a free NS465 Unit 7 sample paper?
This page holds a complete Unit 7 critique of the 5R gut protocol, grading remove, replace, reinoculate, repair and rebalance separately against trial evidence and drawing implications for practice.
Which 5R step has the strongest evidence, per the NS465 Unit 7 sample?
Remove, when it means a defined diet such as low FODMAP for irritable bowel syndrome, which ranked first among diets in a network meta-analysis. Reinoculate also has many trials, but they cannot identify which probiotic to choose.