Current Topics & Controversies in Nutrition
Two separate assignments, two different skills being tested. The first asks you to find and evaluate actual research. The second asks you to watch a documentary and push back on it with a critical eye. Neither is asking you to just summarize — both are asking you to think. Here’s how to approach each one without wasting time going in the wrong direction.
The hardest part of this assignment isn’t the writing. It’s the setup — picking a topic with enough real scientific debate behind it, finding four qualifying articles that actually fit, and then reading them with enough attention to fill out the worksheet meaningfully. Do that part well and the rest follows. Skip it and you’ll end up either restarting mid-assignment or submitting something that reads like a topic summary rather than a research evaluation.
What This Guide Covers
What Each Part Is Actually Testing
These are two separate tasks and they test different things. Don’t conflate them.
Assignment 1 — The Worksheet
This one tests your ability to find, evaluate, and analyze scientific research. The instructor wants to know: can you identify a credible source, understand what a study actually found, and think critically about whether that evidence is strong or limited? It’s a research literacy exercise. The topic matters less than the quality of your analysis.
Assignment 2 — The Discussion Post
This one tests your critical thinking in the context of popular media. Documentaries like What the Health are made with an agenda. The instructor wants to see that you can identify what the film argues, separate fact from framing, and apply scientific skepticism to media claims. 200 words minimum — but your grade depends on the depth, not just hitting the count.
The assignment explicitly states a grade of zero if article PDFs aren’t attached. This isn’t a minor formatting issue — it’s a hard rule. Download the full PDFs (not just the abstracts) from your database and attach them when you submit. Many students lose points here not because of weak analysis but because they forgot the attachments. Do it before you submit, not after you’re graded.
Choosing a Nutrition Topic That Works
The instruction says to choose something you’re curious about. That’s good advice — genuine interest makes reading four research articles much less painful. But there’s a practical constraint: the topic needs to have genuine scientific debate behind it, and it needs to be researchable within your article count.
Real Scientific Debate — Not Just Social Media Noise
A controversial nutrition topic, in the context of this assignment, means one where peer-reviewed researchers genuinely disagree on the evidence — not just one that gets argued about on TikTok. That distinction matters because your worksheet asks you to analyze what the research says. If there’s no actual scientific tension in the literature, there’s nothing to evaluate critically.
Topics with real scientific debate: Ultra-processed foods and metabolic health. Saturated fat and cardiovascular disease risk. Low-carbohydrate vs. low-fat diets for weight management. Artificial sweeteners and gut microbiome effects. Intermittent fasting and long-term health outcomes. Red meat consumption and cancer risk. Plant-based diets and nutrient adequacy. The role of dietary cholesterol in heart disease.Topics to avoid: Anything so settled that there’s no real debate (vitamin C and scurvy — not controversial). Anything so broad that you can’t find four focused articles (nutrition and health — too wide). Anything currently so new that peer-reviewed literature is sparse.
A fast test: search your topic in PubMed. If the first page of results shows studies with conflicting conclusions — one saying X helps, another finding limited effect, a review noting inconsistent evidence — that’s a topic worth choosing. If every result says the same thing, pick something else.
| Topic Area | Specific Angle That Works | Why It Has Scientific Debate |
|---|---|---|
| Dietary Fat | Saturated fat and cardiovascular disease risk | Evidence has shifted significantly since the low-fat era; meta-analyses conflict |
| Sweeteners | Non-nutritive sweeteners and appetite/gut microbiome | Some studies show metabolic effects; others show no harm — design differences explain discrepancies |
| Plant-Based Diets | Nutrient adequacy and long-term outcomes vs. omnivore diets | Strong evidence on some outcomes; gaps on others; confounding variables are a major discussion point |
| Ultra-Processed Food | NOVA classification and health outcomes | Growing evidence of harm, but classification methodology itself is debated |
| Intermittent Fasting | Time-restricted eating vs. continuous calorie restriction for weight and metabolic health | Some RCTs show similar outcomes to standard dieting; longer-term data still limited |
| Red Meat | Processed vs. unprocessed red meat and colorectal cancer risk | IARC classification generates ongoing debate about magnitude of risk and confounders |
Finding the Right Articles
Most students go to Google first. That’s fine for orientation — but Google Scholar and general searches don’t filter for peer review. Your database does.
Use PubMed, CINAHL, or Your University’s Library Database — Not Google Scholar Alone
PubMed (pubmed.ncbi.nlm.nih.gov) is free, covers the major nutrition and health journals, and lets you filter by article type. CINAHL and your library’s licensed databases add access to full-text PDFs without paywalls. Google Scholar can help you find article titles and confirm something is peer-reviewed, but you’ll often hit a paywall for the full text — use your institution’s access instead.
Search strategy: Start with 2–4 keywords specific to your topic. “Saturated fat cardiovascular disease” or “artificial sweeteners gut microbiome.” Use PubMed’s filters to narrow to “Journal Article” and set a date range (last 5–10 years for recency). Once you find a strong article, check its references — you’ll often find two or three more relevant studies cited within it. That’s the most efficient way to build your article list quickly.For the review article: Use the PubMed filter for “Review” or “Systematic Review” and search the same topic. A systematic review or meta-analysis is the strongest type of review article and will demonstrate more critical analysis in your worksheet than a narrative review. Either qualifies, but the systematic review will give you more to work with.
The National Library of Medicine’s PubMed database (pubmed.ncbi.nlm.nih.gov) indexes peer-reviewed biomedical and nutrition research and includes article-type filters that let you identify original research vs. reviews directly. The Advanced Search function lets you combine terms, filter by date, and narrow by study type. For full-text access, use the “Free full text” filter or connect via your institution’s library proxy. This is the most reliable single source for qualifying articles for this assignment.
Peer-Reviewed vs. Review Article — The Difference
These terms trip up a lot of students. Both are peer-reviewed. The difference is what type of article they are.
Original Research Article (x3 required)
- Reports a study that was actually conducted
- Has a Methods section: participants, design, procedures
- Has Results: data, statistics, findings
- Has a Discussion: what the findings mean
- Examples: randomized controlled trial, cohort study, cross-sectional study, clinical trial
- Answers: “What did this study find?”
Review Article (x1 required)
- Synthesizes multiple existing studies on the same topic
- No original data collected — analyzes what others found
- May be a systematic review, meta-analysis, or narrative review
- Has broader conclusions about the state of the evidence
- Systematic reviews and meta-analyses are the most rigorous type
- Answers: “What does the body of evidence collectively say?”
The review article must be a peer-reviewed scientific review — published in an academic journal, with a methods section describing how studies were selected and analyzed. A news article about nutrition research, a blog post summarizing studies, or a government dietary guidelines document does not qualify. When in doubt, check: is it published in a peer-reviewed journal? Does it have a DOI? Does it review multiple primary research studies and synthesize their findings? If yes to all three — it qualifies.
How to Approach the Worksheet
The worksheet is described as a draft for your outline and final paper. That framing is useful: think of each section as building a piece of the larger argument you’ll eventually make about what the science says on your topic.
Read Each Article With a Specific Purpose — Don’t Just Skim
Before you read, know what the worksheet asks you to extract. Most worksheets for this type of assignment ask for: the research question or purpose, the methodology (study design, participants, sample size), the key findings, the limitations, and how the article relates to the controversy on your topic. Read with those questions in mind and take notes as you go. Trying to fill out the worksheet from memory after a surface read leads to vague, incomplete answers.
Evaluate Credibility — Not Just the Journal Name
Credibility evaluation means looking at: Who conducted the study? What institution funded it? Is the journal peer-reviewed and indexed in PubMed or a comparable database? What study design was used — and is that design capable of establishing causation, or only correlation? A well-designed randomized controlled trial carries more evidential weight than an observational study. Note that distinction in your worksheet analysis.
Compare What the Articles Say Against Each Other
The assignment asks you to evaluate the research — which means looking at it as a set, not just describing each article separately. Do your three original research articles agree? Do they conflict? Does the review article resolve the tension or acknowledge it? Noting where studies align and where they diverge is what makes the worksheet reflect real critical analysis rather than a list of summaries.
Write in Complete, Detailed Sentences — The Assignment Explicitly Requires This
The assignment prompt says “complete and detailed sentences.” That means no bullet-point fragments, no one-line answers. Even if the worksheet has short fields, write full sentences. “The study found that participants who consumed X showed Y outcome compared to controls, suggesting a possible link between X and Y, though the observational design limits causal inference.” That’s the register the instructor is looking for — specific, complete, and analytically aware.
Download and Attach PDF Files Before You Submit
This is a zero-points-if-missing requirement. Download the full PDF of each article from PubMed, your library database, or the journal’s website. Don’t attach just the abstract page — the full article PDF. Save each file with a clear name (Author_Year_Topic.pdf) so it’s easy to attach in the correct order. Check the submission before you finalize it to confirm all four files are there.
Watching What the Health With a Critical Lens
What the Health (2017) is a documentary that argues animal products are the primary driver of chronic disease and that a plant-based diet is the solution. It’s persuasive, well-produced, and selectively uses research. That combination is exactly what makes it a good assignment — it gives you plenty to engage with critically.
Take Notes on Specific Claims as You Watch — You Can’t Analyze From Memory
Have a notepad or document open while the film plays. Write down specific claims the film makes, especially ones that feel surprising or absolute. Note when studies or experts are cited — and note what those experts’ actual credentials are and whether any context about their research is provided. Pay attention to what the film doesn’t say: what counterevidence is ignored? What alternative explanations are never addressed?
Types of claims to flag: Claims presented as settled science where the evidence is actually more nuanced. Comparisons that take quantities out of context (e.g. saying processed meat is “as dangerous as cigarettes” — technically based on IARC Group 1 carcinogen classification, but the magnitude of risk is very different). Expert interviews where the expert’s position is fringe within their field. Industry conspiracy framing used as evidence. Any statistic cited without a source you can verify.What the Film Gets Right
Strong evidence supports that diets high in processed meat are associated with increased colorectal cancer risk. Strong evidence supports that plant-forward diets are associated with lower rates of cardiovascular disease and type 2 diabetes. These are not fringe claims — they reflect mainstream nutritional epidemiology. Acknowledging what the film gets right makes your critical analysis more credible.
Where the Film Overstates
The film presents associations as causation without acknowledging confounders. It treats heterogeneous study populations and very different dietary patterns as equivalent. It frequently conflates processed and unprocessed animal products. It selects experts whose views sit outside the mainstream of peer-reviewed nutritional science without disclosing that. Noting specific examples of these patterns in your discussion post demonstrates the critical nutrition lens the assignment asks for.
One useful external reference for checking specific claims: the Academy of Nutrition and Dietetics maintains a position paper on vegetarian and plant-based diets (Journal of the Academy of Nutrition and Dietetics) that reflects the peer-reviewed consensus on nutrient considerations. It’s a good benchmark for what mainstream registered dietitians and nutrition scientists actually conclude vs. what the documentary presents.
Writing the Discussion Post
200 words is not a lot. But “minimum” is doing real work in that instruction. A post that hits 200 words by summarizing the documentary’s plot will not earn full marks. The instructor wants critical engagement — which means your post should do at least three things.
Identify a Claim. Evaluate It. State Your Reasoned Position.
1. Reference at least one or two specific claims from the film. Not “the film talked about meat” — name the specific assertion. “The film claims that eating one egg a day is as bad for your health as smoking five cigarettes a day.” That level of specificity shows you actually engaged with the content.
2. Apply what you know from your nutrition coursework. Does the claim match the evidence you’ve studied? Is it oversimplified? Does it ignore important context — like the difference between correlation and causation, or the role of overall dietary patterns vs. single foods?
3. State your own reasoned position. The assignment says personal opinions are welcome in a non-judgmental setting. You don’t have to agree or disagree with the film’s overall message — but you should say something about what you found credible, what you found questionable, and why. “I was skeptical of X claim because Y” is more valuable than “I found the documentary interesting.”
A critical lens in nutrition means asking: What evidence is this claim based on? Is that evidence strong or weak? Is it being presented accurately, or is context being stripped away? What incentives or biases might be shaping how the information is framed? A documentary can reach a defensible conclusion through flawed reasoning — or reach a questionable conclusion through cherry-picked but real data. Your job is to notice the reasoning, not just the conclusion. That’s what the instructor is evaluating.
Commenting on up to three classmates’ posts earns up to 3 additional points. Comments like “Great post, I agree!” won’t count as substantive participation. Respond to something specific in their post — add a piece of evidence they didn’t mention, respectfully push back on a point, or share a contrasting experience or perspective. Short, focused, specific comments are worth more than long agreements.
What Gets Students Off Track
Choosing a Topic and Then Failing to Find Four Qualifying Articles
Picking a topic because it sounds interesting, then discovering the peer-reviewed literature is too thin or too tangential to fill the worksheet. This wastes significant time and often forces a topic switch mid-assignment.
Confirm Article Availability Before Committing to a Topic
Run a quick PubMed search for your topic before you commit. If you can find 5–6 relevant peer-reviewed studies in under 10 minutes, the topic works. If you’re struggling to find even 3, change the topic now, not after you’ve started writing.
Using a Website, Blog, or News Article as One of the Four Sources
Healthline, WebMD, nutrition blogs, and even some government websites are not peer-reviewed journal articles. They don’t qualify. Using them as one of the four required sources means you’re short on qualifying sources — and the worksheet grade reflects it.
Check: Does It Have a DOI, Author Credentials, and a Journal Name?
Peer-reviewed articles are published in academic journals with DOIs, named authors with institutional affiliations, and a clearly identified journal title. If it doesn’t have all three, it doesn’t qualify as a peer-reviewed source for this assignment.
Writing the Discussion Post as a Film Summary
“The documentary covered nutrition and disease. It interviewed doctors who said meat is bad for you. The main takeaway was that a plant-based diet is healthier.” This hits 200 words but doesn’t demonstrate a critical nutrition lens. It will earn minimal points.
Identify a Specific Claim, Question the Evidence Behind It, State Your Position
Name one specific claim from the film, note what evidence was used to support it, identify what’s missing or overstated, and say what you actually think — with a reason grounded in nutrition science. That structure, even at 200 words, earns the grade.
Forgetting to Attach the PDF Files
The assignment states a zero grade if PDFs aren’t attached. This is not a late-submission deduction — it’s a complete loss of points for the assignment. Students lose this grade every semester not because of weak writing but because of a missed submission step.
Download Full PDFs First, Then Start the Worksheet
Download all four full-text PDFs before you begin writing. Attach them at the start of your submission document, not as an afterthought. Confirm they’re attached before you hit submit. This is the easiest way to protect your grade on the entire assignment.
Frequently Asked Questions
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Before You Start Either Assignment
For the worksheet: pick the topic first, confirm the literature exists, then download all four PDFs. Don’t start writing until you have the articles in hand. Reading with the worksheet questions in mind is ten times faster than reading first and trying to reverse-engineer what you need afterward.
For the discussion post: watch the documentary once through without stopping. Then go back to the two or three claims that felt most surprising or questionable and look them up. What does the peer-reviewed evidence actually say? That gap — between what the film claims and what the research shows — is your material. Write about that gap directly, with specific examples, and you’ll have a strong post.
Both assignments are asking the same underlying question: can you tell the difference between a claim and the evidence behind it? That skill is the whole point of a nutrition curriculum, and it’s what gets tested here.
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