Notable Research Findings

The most groundbreaking individual studies from the latest supplement and nutrition research — in plain language, with the evidence caveats built in. Research signals worth knowing about, not health advice.

Eating 80 grams of sorghum daily for 12 weeks shrank visceral fat in Japanese adults with excess belly fat — but the same study found no effect on a liver enzyme tied to metabolic health.
- 2026-06-11
- Clinical Trial
- Nutrients
This is among the first clinical trials to test sorghum for visceral fat loss, so the finding is intriguing but far from settled — especially since it was a small, single-arm (uncontrolled) study in a specific population, and a related marker of liver stress didn't budge.
Surprisingsorghum for Reduced Visceral Fat
A 5-week trial of 10 g/day soy protein improved insulin sensitivity in overweight adolescent boys — but the effect is from a single, small study in a narrow population.
- 2026-06-23
- RCT
- Nutrients
This is early evidence that soy protein might help with insulin sensitivity, but with only one study in a specific group (overweight teenage boys) and a short duration, it's far from a universal recommendation.
New evidenceSoy Protein for Improved Insulin Sensitivity
A systematic review of 7 studies found no evidence that protein helps older adults with multiple chronic conditions build muscle — but only 2 of those studies actually tested protein.
- 2026-08
- Systematic Review
- n = 932
- Clinical nutrition ESPEN
This doesn't disprove protein's role in muscle health; it reveals that the existing research simply hasn't asked the right question in this specific population, so the popular belief that protein is a reliable muscle booster for all older adults is now contested for those with multiple long-term conditions.
Myth-busterProtein for Improved Muscle Mass
Coffee after C-section cut time to first gas by 2.75 hours in a meta-analysis — but the evidence rests on a small set of low-quality trials.
- 2026-02-04
- Meta-Analysis
- n = 555
- BMC public health
This is the first pooled analysis on coffee and post-surgical flatulence, and while the reduction is real in these studies, the underlying trials were small and unblinded, so the effect may shrink — or vanish — once better research comes in.
New evidenceCoffee for Reduced Flatulence
Black cohosh failed to beat placebo in two RCTs — a systematic review finds the evidence for hot flash relief is thin and mixed.
- 2026-06-23
- Systematic Review
- Nutrients
This null result undermines the popular belief that black cohosh reliably reduces menopausal hot flashes, but with only three studies total (one positive, two neutral), the picture is far from settled — the overall strength of the evidence is low.
Myth-busterBlack Cohosh for Reduced Vasomotor Symptom
Resveratrol lowered diastolic blood pressure by 3.55 mmHg in type 2 diabetes patients — a clean signal from a meta-analysis, but the benefit hasn't been tested in healthy people.
- 2026-04-15
- Meta-Analysis
- Nutrition journal
This is one of the first rigorous summaries to pin a specific, moderate-sized drop in diastolic pressure on resveratrol, but because the effect was seen only in people with type 2 diabetes, it's too early to assume the same would happen for someone without that condition.
Big effectResveratrol for Reduced Diastolic Blood Pressure
Ashwagandha slashed cortisol by a large margin in a meta-analysis of 1,706 adults — but the same study found no effect on TSH, T3, or estradiol.
- 2026-02-25
- Meta-Analysis
- n = 1,706
- Planta medica
This is among the first pooled analyses on ashwagandha and cortisol, so the result is promising but far from settled — especially since the underlying trials weren't blinded, which can inflate perceived benefits.
TrendingAshwagandha for Reduced Cortisol Levels
A meta-analysis tied higher coffee consumption to a 48% greater odds of heart attack — yet the same review found it protective against stroke and arrhythmia.
- 2026-05-07
- Meta-Analysis
- n = 2
- BMC cardiovascular disorders
This finding flips the usual narrative that coffee is mostly protective for the heart, but it comes from a tiny pool of just two studies and contradicts the review’s own results for other cardiovascular outcomes, so the picture is now contested rather than settled.
Myth-busterCoffee for Reduced Myocardial Infarction Risk
NAC plus hydration slashed contrast-kidney injury risk by 29% in a meta-analysis — but the data comes from clinical patients, not healthy supplement users.
- 2025-11-12
- Systematic Review
- n = 671
- Frontiers in medicine
For people undergoing contrast-dye procedures (like CT scans or angiograms), adding NAC to standard hydration meaningfully reduced acute kidney injury — but this is early evidence from a specific clinical population, not a general health recommendation.
Big effectN-Acetyl Cysteine for Reduced Contrast-Associated Acute Kidney Injury
NAC linked to a large rise in progesterone in women with PCOS — but the same meta-analysis found no effect on estradiol, FSH, or butyrate.
- 2025-01-14
- Meta-Analysis
- Nutrients
This is the first solid meta-analytic evidence tying NAC to progesterone in PCOS, but with only a handful of studies behind it, the finding is intriguing rather than definitive.
New evidenceN-Acetyl Cysteine for Increased Progesterone Level
Anthocyanins showed no link to lower obesity odds in a meta-analysis of 302 people — even as total flavonoids and isoflavones did in a much larger analysis.
- 2026-04-02
- Meta-Analysis
- n = 302
- BMC endocrine disorders
This tells us that, so far, the evidence for anthocyanins specifically is weak and inconclusive; don't treat this single small meta-analysis as the final word, but it does pop the bubble of any hype that 'all polyphenols work the same' for weight.
Myth-busterAnthocyanins for Reduced Obesity
A meta-analysis found that olive oil was tied to slightly higher systolic blood pressure than mixed nuts — a statistically significant difference (p<0.001) — while other heart risk markers showed no advantage for either option.
- 2025-11
- Meta-Analysis
- Nutrition, metabolism, and cardiovascular diseases : NMCD
This challenges the blanket assumption that olive oil is always the superior choice for heart health, but the finding is preliminary and based on a single meta-analysis where the olive oil group didn't actually worsen blood pressure on its own — it just didn't lower it as much as the mixed-nut group did.
Myth-busterOlive Oil for Increased Systolic Blood Pressure
Acute mountain sickness struck just 2% of quercetin users vs. 25% on placebo — but the trial included only 55 people.
- 2026-07-11
- RCT
- n = 55
- European journal of nutrition
This is among the first controlled studies linking quercetin to altitude sickness prevention, and while the effect is unusually large, it comes from a small, early-phase trial that needs independent replication before drawing firm conclusions.
Big effectQuercetin for Reduced Acute Mountain Sickness Incidence
In a meta-analysis of 424 hospitalized COVID-19 patients, NAC was tied to a 51% lower odds of death — but the results varied considerably across the 10 small trials.
- 2025-07-29
- Meta-Analysis
- n = 424
- Inflammopharmacology
This is a large effect from a moderately strong body of evidence (4 of 7 studies show benefit, none show harm), but the small total sample and moderate statistical heterogeneity mean the precise size of the benefit is still uncertain.
Big effectN-Acetyl Cysteine for Reduced Mortality Risk
A double-blind trial of 153 women with early-onset preeclampsia found that 600 mg/day of N-acetylcysteine did not significantly delay progression to severe disease — casting doubt on hopes for a low-cost option in resource-limited settings.
- 2026-06-17
- RCT
- n = 153
- PloS one
This is one of the first randomized trials testing NAC for this condition; the null result suggests it is not effective in this population, but the body of evidence is still too thin to draw a final conclusion.
Myth-busterN-Acetyl Cysteine for Reduced Time-to-Disease Progression
Curcumin cut BMI by 0.69 kg/m² in type 2 diabetes patients — but only at doses above 1,000 mg/day and in a clinical population.
- 2025-11-10
- Meta-Analysis
- n = 699
- Nutrition reviews
This is a moderately large effect for a supplement, but the evidence comes from a specific clinical group (type 2 diabetes), so results may not apply to people without the condition. Across 7 studies, most found a benefit, giving moderate confidence in the finding.
Big effectTurmeric for Reduced Body Mass Index
First systematic review ties vitamin E to NASH resolution in children with fatty liver — but dose and long-term effects remain unknown
- 2025-12-08
- Systematic Review
- n = 1,503
- BMC gastroenterology
This is early evidence from a single meta-analysis; while promising, the unspecified dose and clinical population mean the findings need replication before we can trust them broadly.
New evidenceVitamin E for Increased NASH Resolution
A meta-analysis of 1,257 stroke patients found L-DOPA had no effect on mood (SMD -0.10, 95% CI -0.30 to 0.10) — a null result that challenges the popular belief that boosting dopamine lifts spirits, though the finding is limited to a clinical population.
- 2026-04-03
- Meta-Analysis
- n = 1,257
- Neurorehabilitation and neural repair
This null result contradicts the common assumption that L-DOPA improves mood, but because it comes from a single meta-analysis in stroke rehabilitation — and is among the first studies on this pairing — the picture is far from settled, especially for healthy people or other conditions.
Myth-busterL-DOPA for Improved Mood
NAC failed to improve attention or any other cognitive measure in a 12-week trial of 481 children — despite promising mouse data.
- 2026-07
- RCT
- n = 481
- Pediatric neurology
This is the first large, rigorous test of NAC for attention in a clinical population, and the null result directly contradicts the hype from earlier animal studies — but because the trial was done in children with a specific genetic condition (neurofibromatosis type 1), the finding may not apply to healthy adults or other groups.
Myth-busterN-Acetyl Cysteine for Improved Attention Span
A meta-analysis of 16 studies found higher selenium tied to a 19% lower risk of colon cancer — but not for rectal cancer or colorectal cancer overall.
- 2026-04-07
- Meta-Analysis
- n = 16
- BMC public health
This is among the first meta-analyses to link selenium levels with colon cancer risk, but the same study failed to find a significant effect on rectal or overall colorectal cancer, so the result is intriguing but far from settled.
New evidenceSelenium for Reduced Colitis-Related Mortality
The only randomized trial on vitamin D for jaw pain found it worked no better than diclofenac — but that's based on a single study.
- 2026-06-23
- Systematic Review
- BMC oral health
This is the first systematic review to look at diet and temporomandibular disorder, but with just one small trial on vitamin D, the evidence is too thin to draw any conclusion — treat this as an early signal, not a settled answer.
New evidenceVitamin D for Reduced Pain Intensity
First review links low-bioavailable tocotrienols to white matter protection — but the evidence is still sparse
- 2025-06-30
- Systematic Review
- International journal of molecular sciences
This is among the first studies to flag a specific role for tocotrienols in brain structure, but because it's a scoping review of heterogeneous studies, it's a signal, not a conclusion.
New evidenceVitamin E for Improved White Matter Structural Protection
A meta-analysis found no link between vitamin D levels or intake and melanoma risk — but the evidence is too thin to call it settled.
- 2026-03-11
- Meta-Analysis
- Journal of translational medicine
This is one of the first comprehensive looks at the question, so the null result challenges the popular idea that vitamin D protects against melanoma, but the limited quality of the underlying studies means we can't rule out a real effect — the picture is now contested, not closed.
Myth-busterVitamin D for Reduced Melanoma Risk
A meta-analysis of 27 trials linked 3,000 mg/day taurine to lower HbA1c — but every participant had long COVID, so the result may not apply to healthy people.
- 2026-03-10
- Meta-Analysis
- n = 308
- BMC infectious diseases
This is the first moderately strong evidence that taurine might improve blood sugar control, but it comes entirely from people recovering from COVID-19, and the underlying studies disagreed on how much it helped — so treat it as an early signal, not a settled fact.
New evidenceTaurine for Reduced Hemoglobin A1c
IV iron cut heart failure hospitalizations and cardiovascular death by 21% in a meta-analysis — but only in patients with chronic kidney disease.
- 2026-03-27
- Meta-Analysis
- n = 7,009
- BMC cardiovascular disorders
This is a promising signal for a specific, high-risk group, but the finding comes from only a handful of studies and needs replication before it changes practice.
Big effectIron for Reduced First Heart Failure Hospitalization or Cardiovascular Death
A meta-analysis of 54,621 people found that excessive iodine intake (median 350 μg/L) was linked to a 13% higher odds of thyroid nodules — but that increase was not statistically significant, meaning it could be due to chance.
- 2026-01-27
- Meta-Analysis
- n = 54,621
- Frontiers in endocrinology
This is among the first large-scale analyses to test the link between high iodine and thyroid nodules, and the null result means the picture is still contested — don't treat this as settled evidence either way.
Myth-busterIodine for Increased Risk of Thyroid Nodule
Even at 3,200 IU/day, vitamin D3 didn't reduce falls in a 5-year trial of 2,495 healthy older adults — who already had adequate levels
- 2026-01-13
- RCT
- n = 2,495
- Journal of the American Geriatrics Society
This large, long-term RCT challenges the common assumption that high-dose vitamin D prevents falls, but it's one study — the overall body of evidence on this specific pairing is still thin, so the picture isn't settled.
Myth-busterVitamin D3 for Reduced Fall Risk
Iodine supplementation in iodine-deficient pregnant women was linked to a larger thyroid volume — but the effect surfaced only in Europe and among those who kept taking it until after giving birth.
- 2026-06-10
- Meta-Analysis
- Frontiers in public health
This is an early finding from a meta-analysis, so the picture is far from settled — but it suggests that while iodine helps correct thyroid function in deficient mothers, it might also trigger a temporary gland enlargement in specific subgroups, leaving a nuance worth watching as more evidence accumulates.
SurprisingIodine for Increased Thyroid Volume
A meta-analysis of 4 studies and a genetic analysis found no link between vitamin D levels and celiac disease risk – challenging the common belief that the vitamin protects against autoimmune conditions, though the evidence remains thin.
- 2026-07-03
- Meta-Analysis
- n = 4
- Medicine
This null result questions a popular assumption, but because it's among the first studies on this specific pairing and relied on genetic proxies rather than supplementation, it does not settle the question – treat it as a cautious first look, not a final answer.
Myth-busterVitamin D for Reduced Celiac Disease Risk
Vitamin C cut bronchopulmonary dysplasia risk by 41% in very preterm infants — but evidence for this single early finding is low certainty.
- 2025-07-09
- Meta-Analysis
- n = 538
- PloS one
This is the first solid data linking vitamin C to a specific lung complication in premature babies, but with only 538 infants and no neurodevelopmental benefit seen, it's too early to recommend supplementation based on this result alone.
New evidenceVitamin C for Reduced Bronchopulmonary Dysplasia