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.

Pre-workout protein edged out post-workout for leg press strength in a meta-analysis — but only just (SMD: 0.70; p = 0.048; I² = 31%).
- 2025-06-21
- Meta-Analysis
- Nutrients
This is the first meta-analysis to directly compare before versus after exercise protein timing for strength, and while it found a modest benefit for leg press, the effect was borderline significant and didn't replicate across chest press or lean mass gains — so it's intriguing, but too early to rewrite your routine around it.
New evidenceProtein for Improved Leg Press Strength
Vitamin D for at least three months lowered thyroid antibodies in autoimmune patients — but the benefit may depend on starting levels.
- 2025-06-16
- Meta-Analysis
- n = 577
- PeerJ
This meta-analysis is the first to pool evidence on vitamin D and thyroid antibodies, but with only 577 patients and a wide range of doses, the results are preliminary and need replication.
New evidenceVitamin D for Reduced Anti-Thyroid Peroxidase Antibody
Tribulus raised erectile function scores by about 3 points on a 25-point scale in a meta-analysis — but the same review found it did not budge testosterone levels at all.
- 2025-05-13
- Meta-Analysis
- International journal of impotence research
This is a small, low-strength body of evidence (3 studies, 2 positive, 1 neutral) from a clinical population of men with erectile dysfunction, so the modest improvement may not apply to healthy men or general supplement users.
TrendingTribulus for Improved Erectile Function
L-carnitine supplements didn't lower total cholesterol in a meta-analysis of 28 trials — but the patients were all on dialysis
- 2024-12-02
- Systematic Review
- n = 28
- Frontiers in medicine
This contradicts the popular notion that L-carnitine helps manage cholesterol, but only in a specific clinical group. Since this is among the first indexed studies on this pairing, the picture is far from settled for healthy people.
Myth-busterL-Carnitine for Reduced Total Cholesterol Levels
A double-blind trial of 500 mg Haritaki twice daily for angina found no improvement in symptoms — and no effect on cholesterol, inflammation, or quality of life either.
- 2026-01-24
- RCT
- n = 100
- BMC complementary medicine and therapies
This small but well-designed study contradicts the popular belief that Haritaki helps heart conditions, but since it's one of the first trials on this pairing, the verdict is far from final.
Myth-busterHaritaki for Improved Angina Symptom
A meta-analysis of 773 patients found NAC linked to a 34% lower risk of post-ERCP pancreatitis — but the result wasn't statistically significant, and it didn't reduce severity either.
- 2025-11-04
- Meta-Analysis
- n = 773
- BMC gastroenterology
This is among the first indexed studies on NAC for this specific clinical setting, so the evidence is too weak to support routine use; the null result and lack of effect on severity mean the popular notion that NAC prevents pancreatitis isn't backed by this analysis.
Myth-busterN-Acetyl Cysteine for Reduced Incidence of Post-ERCP Pancreatitis
A small trial in elite wrestlers linked 3 mg/kg of L-theanine (paired with caffeine) to lower trait anxiety — but seven other performance and cognitive measures showed no significant effect from the combination.
- 2025-09-22
- RCT
- Journal of the International Society of Sports Nutrition
This is an early, exploratory finding in a very specific group of athletes, so don’t assume the anxiety benefit or the performance edge applies to you — especially since the same study found zero benefit on grip strength, vertical jump, reaction time, and four other outcomes.
SurprisingL-Theanine for Reduced Trait Anxiety
Lactobacillus therapy nearly doubled the odds of cervical lesion resolution in women with HPV — a meta-analysis of five small trials, none of which specified the dose used.
- 2025-08
- Meta-Analysis
- n = 326
- The Journal of international medical research
This is an unusually large effect from a well-conducted meta-analysis, but it's based on just 326 participants across five studies, and this pairing has almost no prior indexed research — so the finding is promising but far from settled.
Big effectLactobacillus for Resolved Cervical Lesion
A probiotic slashed C. diff recurrence to 1.7% versus 13.1% when added to standard antibiotics — but the benefit was limited to mild-to-moderate cases and several other outcomes (diarrhea, gut microbiome, functional ability) showed no improvement.
- 2025-06-02
- RCT
- Scientific reports
This is an unusually large effect from a single, well-controlled trial, but it's one of the first studies on this specific combination, so the finding needs replication before you can count on it.
Big effectsaccharomyces boulardii for Reduced Recurrence Rate
A meta-analysis found that soy consumption (as miso) showed no statistically significant link to all-cause mortality — despite the broader fermented food category being tied to a lower risk.
- 2026-02-26
- Systematic Review
- Frontiers in nutrition
This null finding challenges any assumption that soy-based fermented foods like miso automatically carry the same mortality benefits as yogurt, cheese, or chocolate, but it’s one of the first systematic reviews on this specific pairing, so the picture isn’t settled yet.
Myth-busterSoy for Reduced All-Cause Mortality
A meta-analysis of 40 trials found soy isoflavones didn't significantly thicken the endometrium — but the result fell just short of statistical significance (p=0.059).
- 2025-01
- Meta-Analysis
- n = 3,285
- Advances in nutrition (Bethesda, Md.)
This contradicts the widespread belief that soy isoflavones act like estrogen in the body, but because the finding is on the edge of significance and this is among the first large-scale analyses of its kind, it doesn't settle the debate — it shifts the burden of proof.
Myth-busterSoy for Reduced Endometrial Thickness
Chromium cut triglycerides sharply in women with PCOS — a large effect in a clinical group, not a general population.
- 2025-10
- Meta-Analysis
- n = 683
- Endocrinologia, diabetes y nutricion
This is early evidence from a well-conducted meta-analysis, but the result is specific to women with PCOS; it does not yet tell us whether the same benefit would appear in healthy people or other conditions.
Big effectChromium for Reduced Triglyceride Levels
A meta-analysis found vitamin K intake linked to a 17% lower fracture risk — but the confidence interval crossed 1.0, meaning the result wasn't statistically significant.
- 2025-09-09
- Meta-Analysis
- n = 776
- Current rheumatology reviews
This early meta-analysis doesn't confirm the popular belief that vitamin K protects bones; the null result and lack of effect on hip fractures mean the picture is still contested, not settled.
Myth-busterVitamin K for Reduced Fracture Risk
Vitamin D halved the risk of post-surgery atrial fibrillation in heart bypass patients who were truly deficient — but showed no benefit for those with milder insufficiency.
- 2025-10-17
- Meta-Analysis
- n = 694
- BMC cardiovascular disorders
This is a large, precisely measured effect in a specific clinical population, but it's one of the first studies on this pairing. The finding likely applies only to vitamin D deficient individuals undergoing coronary artery bypass grafting — not to the general public or even to heart surgery patients with normal vitamin D levels. Notably, the same meta-analysis found the supplement did not shorten hospital stays or reduce time on a ventilator, suggesting the benefit is narrow.
Big effectVitamin D for Reduced Postoperative Atrial Fibrillation
Stroke survivors with lower serum albumin showed a clear cognitive decline difference — a meta-analysis of 9 studies found the gap averaged 3.85 units, but the link is only in a clinical population and hasn't been tested in healthy adults.
- 2025-08-13
- Systematic Review
- Frontiers in neurology
This is the first systematic review to tie low albumin to post-stroke cognitive impairment, but with no data on healthy people and no dose specified, it's an early clue — not a conclusion you can act on yet.
New evidenceAlbumin for Reduced Cognitive Impairment
A mouse study found a new Lactobacillus paracasei strain lowered three inflammatory markers — but the results come from animals, not humans.
- 2026-01-29
- Meta-Analysis
- Frontiers in microbiology
This is early animal research on a specific strain, so while the anti-inflammatory signal is promising, it's far from being a proven supplement for people with colitis.
TrendingLactobacillus paracasei for Reduced Inflammation
Folic acid improved cognitive scores in a controlled trial (P<0.05) – but the benefit appeared only in patients with cerebral small vessel disease.
- 2026-01
- RCT
- The journal of prevention of Alzheimer's disease
This single, early trial suggests folic acid may help offset cognitive decline in people with small vessel disease, but because it is among the first such studies, the result needs confirmation and may not extend to healthier populations.
New evidenceVitamin B9 for Improved Cognitive Function
A meta-analysis linked high-dose, long-course vitamin D3 to a moderate drop in insulin resistance — but the same analysis found no effect on visceral fat.
- 2026-02-20
- Meta-Analysis
- Medicine
This is one of the first pooled analyses to suggest vitamin D3, not D2, can improve how cells respond to insulin in people with obesity and metabolic syndrome, but a single meta-analysis — especially one that saw no benefit for a closely related outcome — is far from conclusive.
New evidenceVitamin D3 for Improved Insulin Sensitivity
Spirulina lowered HOMA‑IR by 0.68 in a meta‑analysis — but the dose that produced this effect wasn't specified.
- 2025-11
- Meta-Analysis
- Complementary therapies in medicine
This is the first indexed meta‑analysis on spirulina for insulin sensitivity, so while the drop in HOMA‑IR is promising, we can't yet say how much to take or who benefits most.
TrendingSpirulina for Improved Insulin Sensitivity
Vitamin D deficiency triples odds of surgical site infection in a meta-analysis of 12,000+ patients — but the link was strongest at a specific cutoff, and no trial has yet tested whether supplementation actually prevents infections.
- 2026-02
- Meta-Analysis
- n = 737
- Surgical infections
This is the first large-scale synthesis to link low vitamin D levels to a higher risk of surgical infections, but because it pools observational data rather than randomized trials, it can't prove that raising vitamin D levels would lower that risk — a key gap that limits how much we can act on it.
New evidenceVitamin D for Reduced Surgical Site Infection
In 488 dementia patients with a history of stroke, 240 mg/day of a specific ginkgo extract improved cognition — but the effect was modest and the p-value hovered near the borderline.
- 2026-03-13
- Systematic Review
- n = 488
- Frontiers in neurology
This meta-analysis adds to a moderate body of evidence (5 of 7 studies showing benefit) that ginkgo may help cognition in a very specific clinical population — people with dementia after a cerebral infarction — but the small effect size and narrow patient group mean the results don't apply to healthy adults or general memory concerns.
TrendingGinkgo for Improved Cognitive Function
Perioperative glutamine reduced infectious complications by 64% in a meta-analysis of 950 colorectal surgery patients — but the evidence is low-to-moderate certainty and may not generalize to healthy people.
- 2026-03
- Meta-Analysis
- n = 950
- Technology in cancer research & treatment
This large effect is promising for a specific clinical scenario, but because the studies are among the first on this pairing and the certainty is low, the finding needs replication before it can be considered reliable for broader use.
Big effectL-Glutamine for Reduced Infectious Complication
A meta-analysis of 7 trials found curcumin cut organ failure scores by a large margin in critically ill patients — but the results apply only to that specific, severely ill population.
- 2026-02-06
- Meta-Analysis
- n = 691
- Phytotherapy research : PTR
This is an unusually strong signal from a small body of evidence, but it's too early to assume healthy people would see any similar benefit.
Big effectTurmeric for Reduced SOFA Score
Vitamin D supplements taken during pregnancy didn't improve bone structure in children at age 6–7 — across nine separate measurements, none showed a statistically significant effect.
- 2026-06
- RCT
- n = 222
- Bone
This null result from a double-blind randomized trial challenges the assumption that boosting prenatal vitamin D will meaningfully shape children's bone architecture, though it's among the first studies to look at this specific question, so the picture is far from settled.
Myth-busterVitamin D for Increased Tibial Cross-sectional Area
A three-year trial of 2,000 IU/day vitamin D3 in 1,848 older adults found it did not budge a key bone-remodeling marker — but a simple home strength routine did.
- 2024-12-09
- RCT
- n = 1,848
- The Journal of clinical endocrinology and metabolism
This null result challenges any assumption that vitamin D alone meaningfully alters sclerostin, a protein that regulates bone formation, at this dose in healthy seniors — though the picture is far from settled, as this is one of the first studies to test the specific pairing head-to-head.
Myth-busterVitamin D3 for Reduced Serum Sclerostin Level
Vitamin D supplementation linked to a 0.60 drop in insulin in a meta-analysis — but only in people with fatty liver disease.
- 2026-04
- Meta-Analysis
- The Journal of nutrition
The finding is based on three randomized trials, all pointing in the same direction, making the evidence moderately reliable — but it only applies to patients with metabolic-associated fatty liver disease, not to healthy individuals.
Big effectVitamin D for Improved Insulin Levels
Curcumin showed a huge effect on rheumatoid arthritis response in a meta-analysis — but the evidence behind that number is rated very low certainty.
- 2026-01-12
- Meta-Analysis
- n = 244
- Frontiers in immunology
This is an early, promising signal from a small set of trials, but the evidence is too shaky to act on — larger, more rigorous studies are needed before anyone should change their treatment plan.
Big effectTurmeric for Improved ACR20 Response
One avocado a day slashed triglycerides by 17% in a tightly controlled feeding trial — but only in people with already-elevated levels, and three out of four prior studies found no effect.
- 2026-02
- RCT
- The American journal of clinical nutrition
This is the strongest signal yet that swapping in avocado for less healthy fats and sugars can meaningfully lower triglycerides, but the overall evidence is still weak and inconsistent, so don't treat this as settled.
Big effectavocado for Reduced Triglyceride Levels
Berberine plus cinnamon lowered fasting blood sugar in a 12-week trial — but only the combo was tested, not berberine alone.
- 2025-02-25
- RCT
- European journal of nutrition
This is an early look at a specific pairing, not a standalone verdict on berberine; the results are promising but come from a single clinical trial in people with type 2 diabetes, so they don't yet apply to the general curious supplement-taker.
TrendingBerberine for Reduced Fasting Blood Glucose Levels
A 3-year trial found green tea extract did not lower the risk of colon polyps returning overall — and for people with a specific gene variant, the placebo group actually had fewer recurrences (41.4% vs 35.7%).
- 2025-04-01
- RCT
- n = 550
- Pharmacogenomics
This rigorous, double-blind study challenges the common belief that green tea prevents colorectal polyps, though a possible benefit in a genetic subgroup needs replication before any conclusion can be drawn — the overall evidence remains too thin to change practice.
Myth-busterGreen Tea for Reduced Colorectal Adenoma Recurrence