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.

Blood orange trial found no cognitive boost overall — but higher blood carotenoids linked to slower decline in older adults with a key Alzheimer's gene variant.
- 2025-11
- RCT
- n = 442
- The American journal of clinical nutrition
This is among the first solid RCT data on blood orange for cognition, and it came up null for the average participant — the promising signal appeared only in a genetic subgroup, which means it's a preliminary lead, not a recommendation.
New evidenceBlood Orange for Improved Global Cognition
Pea protein slashed glucose spikes by 37% more than glucose alone in a single-blind trial — but the same study found it both lowered and raised insulin, a mixed signal that demands caution.
- 2026-01-30
- RCT
- PloS one
This is one of the first controlled trials to compare pea protein head-to-head with whey for glycemic control, so while the glucose effect is large and statistically robust, the contradictory insulin findings and the single-blind design mean we need replication before drawing firm conclusions.
New evidencePea Protein for Reduced Glycemic Response
Vitamin B6 among treatments that reduce pregnancy nausea, meta-analysis finds — but low-quality evidence tempers confidence
- 2026-04-20
- Meta-Analysis
- n = 3,017
- Nutrients
This meta-analysis adds vitamin B6 to the list of options for pregnancy nausea, but the low-to-moderate quality evidence and limited side-effect reporting mean the true benefit could be smaller, and the lack of a specified dose makes it hard to apply directly.
Big effectVitamin B6 for Reduced Nausea and Vomiting in Pregnancy Symptoms
Spirulina dropped body weight by nearly 3 kg in a 12-week trial — but the volunteers all had multiple sclerosis.
- 2025-08-28
- RCT
- n = 80
- Nutrition journal
This is an intriguing first look at spirulina for weight in a very specific clinical population; the effect is large and well-measured, but the results may not apply to healthy people looking to lose weight.
Big effectSeaweed for Reduced Body Weight
Vitamin D raised blood calcium in kidney transplant recipients — a harmful effect that outweighed some bone benefits in 985 patients.
- 2025-09-24
- Meta-Analysis
- n = 985
- Systematic reviews
This meta-analysis is among the first to rigorously tally the trade-offs in this specific population, so the findings are a serious heads-up but not a final verdict — especially since the same analysis found no overall fracture prevention and a significant uptick in hypercalcemia risk.
SurprisingVitamin D for Increased Serum Calcium Level
A meta-analysis of 17 trials found flaxseed oil lowered systolic blood pressure by less than half a point — a statistically meaningless shift.
- 2025-01
- Meta-Analysis
- n = 17
- Current hypertension reviews
This null result contradicts two earlier studies that suggested flax might help, so the overall picture is now genuinely contested — not settled.
Myth-busterFlax for Reduced Systolic Blood Pressure
Vitamin C lowered systolic blood pressure in a meta-analysis of 1,425 people with type 2 diabetes — but only when taken alone or with vitamin E, not with E alone.
- 2025-08-05
- Meta-Analysis
- n = 1,425
- Nutrition reviews
This is a moderate-strength signal from four studies, all pointing in the same direction, but until more trials confirm it in non-diabetic populations and settle the dose, it's early evidence — not a prescription.
New evidenceVitamin C for Reduced Systolic Blood Pressure
Three tablespoons of olive oil daily tied to 66% fewer neonatal complications — but the finding comes from a single trial in women with gestational diabetes
- 2026-03-31
- RCT
- n = 190
- Nutrients
This is one of the first rigorous tests of olive oil in gestational diabetes, and while the 66% reduction in neonatal complications is striking, the effect was measured in a specific clinical population and several other outcomes (like weight gain) didn't budge, so the benefit may be narrower than it appears.
Big effectOlive Oil for Reduced Neonatal Complication
A 16-week trial found Cissus quadrangularis boosted the fullness hormone GLP-1 by 42.2 pg/mL – the first solid evidence for this herb, pending replication.
- 2025-12-25
- RCT
- n = 248
- Medicina (Kaunas, Lithuania)
This large, double-blind RCT provides the first rigorous evidence that Cissus quadrangularis extract can raise GLP-1 levels in overweight adults, a promising signal for weight management — but because it's a single early study, caution is warranted until independent teams confirm the results.
New evidenceCissus quadrangularis for Increased Intestinal GLP-1 Levels
Stevia didn't dull appetite in a 428-person meta-analysis — and researchers couldn't even analyze its effect on calorie intake due to sparse data.
- 2025-01-30
- Meta-Analysis
- n = 428
- Obesity reviews : an official journal of the International Association for the Study of Obesity
This challenges the common assumption that stevia helps cut calories by suppressing appetite, but because the analysis rests on a small pool of clinical studies and couldn't directly test energy intake, the picture is far from settled.
Myth-busterStevia for Reduced Energy Intake
Vitamin D supplementation was linked to a 50-point drop in a measure of beta-cell function in type 2 diabetes — but the same meta-analysis found it improved insulin, HbA1c, and inflammation.
- 2025-07-30
- Meta-Analysis
- Nutrients
This is one of the first meta-analyses to report a harmful effect on HOMA-B alongside clear benefits on other markers, so the picture is now genuinely contested — not settled.
Myth-busterVitamin D for Reduced HOMA-B
A systematic review ranked L. rhamnosus GG among the most effective probiotics for children with functional abdominal pain — but the finding is based on a clinical population, not general wellness.
- 2026-03-10
- Systematic Review
- Frontiers in nutrition
This is one of the first indexed analyses to single out L. rhamnosus GG for complete pain resolution in a specific pediatric condition, so the result is promising but still early and may not apply to adults or general digestive discomfort.
TrendingLactobacillus rhamnosus GG for Complete Pain Resolution
A 12-week RCT found 200 mg/day of Gotu Kola cut maximum wrinkle depth by 13.3% in middle-aged Korean women — but the effect was modest on hydration, elasticity, and brightness, and the results may not generalize beyond this specific population.
- 2026-05-08
- RCT
- n = 112
- Nutrients
This is the first well-controlled study to show oral Gotu Kola can measurably reduce wrinkle depth, but the evidence is still early and limited to one demographic, so it’s a promising signal, not a settled benefit.
Big effectGotu Kola for Reduced Maximum Wrinkle Depth
Bovine colostrum didn't reduce musculoskeletal pain in a 3-month trial—even while it accelerated bone healing in hip fracture patients.
- 2025-04-18
- RCT
- n = 116
- The Journal of bone and joint surgery. American volume
For people hoping colostrum might ease general joint or muscle pain, this early study suggests it won't—though it did improve some aspects of recovery after a hip fracture. Because the population was clinical and the study is one of the first on this topic, the picture is far from settled.
Myth-busterBovine Colostrum for Reduced Musculoskeletal Pain
Selenium cut rheumatoid arthritis pain by roughly 13 points on a 100-point scale in a meta-analysis of 367 patients — but no measure of inflammation budged.
- 2025-10
- Meta-Analysis
- n = 367
- Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS)
This is the first decent-sized meta-analysis on selenium for RA joint pain, and the result is promising but preliminary: the pain relief was clear, yet the fact that inflammatory markers and stiffness didn't change means we still don't know why it worked or whether it generalises beyond this specific clinical group.
New evidenceSelenium for Reduced Pain
A 6-month trial of one avocado a day found no memory improvement in 251 overweight adults — the null result held across all cognitive tests.
- 2026-06
- RCT
- n = 251
- The journal of nutrition, health & aging
This well-designed but open-label trial challenges the popular notion that avocados are a brain food for memory, at least in overweight adults; the picture is now contested, and more blinded studies are needed to settle it.
Myth-busteravocado for Improved Memory Function
Cumin supplementation slashed fasting blood sugar by a massive effect size in a meta-analysis — but the finding comes from a single, early-stage review of people with existing metabolic disorders.
- 2026-01-13
- Systematic Review
- Frontiers in nutrition
This is a promising signal, not a settled fact: the effect is unusually large for a dietary intervention, but the body of evidence is still thin, and the result may not apply to healthy people or those without metabolic syndrome.
Big effectCumin for Reduced Fasting Blood Glucose Levels
Tart cherry juice helped athletes regain muscle strength after exercise — the effect size grew larger each measurement day, reaching ES 4.82 at 96 hours — but the underlying studies varied wildly, making the evidence low-to-moderate certainty.
- 2026-04-07
- Systematic Review
- Sports medicine - open
This is the first systematic review to gather the data on tart cherry and muscle recovery, and the numbers look impressive, but because the individual trials disagreed strongly and the certainty is low, it's too early to take this as settled — think of it as a promising signal, not a guarantee.
Big effecttart cherry for Improved Muscle Strength
Spirulina supplementation was linked to a large drop in total cholesterol in a meta-analysis of 35 studies — but the effect was clearest in overweight and obese adults, and other metabolic measures like blood sugar control didn't budge.
- 2025-06-27
- Systematic Review
- n = 35
- Frontiers in nutrition
This is one of the first systematic reviews to pull together the evidence on spirulina for cholesterol, and the effect size is unusually large by supplement standards — but because the studies weren't blinded and the benefit didn't extend to body composition or glycemic control, the finding is promising but far from settled.
Big effectSpirulina for Reduced Blood Cholesterol
Systematic review of 1,502 people finds Lactobacillus salivarius HA-118 and other probiotics left inflammation markers unchanged — fecal calprotectin, TNF-α, and hs-CRP all flat.
- 2025-08-01
- Systematic Review
- n = 1,502
- Iranian journal of medical sciences
This large systematic review contradicts the common belief that probiotics reliably lower inflammation, but because the evidence on this specific strain is still limited and the same review found hints of benefit for gut barrier function, the overall picture remains contested.
Myth-busterLactobacillus salivarius HA-118 for No Change in Inflammation Markers
In the largest trial yet of Manuka honey for children's tonsillectomy pain, 5 ml six times a day failed to outperform standard care across 400 patients.
- 2025-05-05
- RCT
- n = 400
- Anaesthesia
This well-designed, double-blind trial found no benefit from honey for pain, painkiller use, or recovery — and even reported vomiting as a side effect — making the once-popular home remedy a contested option at best.
Myth-busterManuka Honey for Reduced Postoperative Pain Score
Tart cherry juice consistently fails to reduce muscle soreness in a systematic review of soccer players — despite trending, none of the three studies reached statistical significance.
- 2026-05-21
- Systematic Review
- Nutrients
This review pooled very low‑certainty evidence from three small studies; the direction was neutral across all of them, so the popular claim that tart cherry beats post‑workout soreness is not backed by reliable data yet.
Myth-bustertart cherry for Reduced Muscle Soreness
Preoperative vitamin D was tied to a 65% lower risk of hypocalcemia after parathyroid surgery — but the evidence was low-grade and limited to a specific clinical population.
- 2026-02-26
- Meta-Analysis
- n = 2,750
- Head & neck
This is among the first meta-analyses on this pairing, and while the effect size is unusually large, the low quality of evidence and the fact that other outcomes like symptomatic hypocalcemia and calcium supplement needs didn't budge mean the finding should be treated as promising but far from definitive.
Big effectVitamin D for Reduced Hypocalcemia
Flaxseed (20 g/day) cut migraine severity by a 5-point drop versus 1-point for placebo — but it didn't reduce how often migraines came or how long they lasted.
- 2026-03
- RCT
- n = 68
- The Journal of nutrition
This small 8-week trial offers an early, intriguing signal that flaxseed might blunt the pain of a migraine when it hits, but don't expect it to prevent attacks — and because it's among the first studies on this pair, the result needs replication before it's trustworthy.
Surprisingflaxseed for Reduced Headache Severity
Neural tube defect deaths in Nigeria dropped from 33% to 4.6% across recent decades — but the data comes from just 390 patients in a single-country review.
- 2026-03
- Systematic Review
- n = 390
- Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia
This is the first systematic review to track folate-linked mortality trends in a Nigerian pediatric population, so the drop is promising but rests on a small sample and may not apply to other regions or healthcare settings.
New evidenceVitamin B9 for Reduced Neural Tube Defect Mortality
Zinc slashed severe mouth sore risk by 74% in a meta-analysis of 1,076 chemo patients — but the dose was high (≥150 mg/day) and the effect was measured at specific time points.
- 2026-03-24
- Meta-Analysis
- n = 1,076
- Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer
This is one of the first pooled analyses on zinc for oral mucositis, so the finding is promising but still preliminary — especially since the studies weren't blinded, which can inflate apparent benefits.
Big effectZinc for Reduced Oral Mucositis Severity
Black seed cut fasting blood glucose by 21 mg/dL in a meta-analysis of 16 diabetes trials — but had no effect on insulin, triglycerides, or body weight.
- 2025-04-08
- Meta-Analysis
- Complementary therapies in medicine
This is the strongest evidence yet that black cumin can meaningfully lower blood sugar in people with type 2 diabetes, but the benefit stops there — it didn't budge other key markers like insulin or weight, so it's not a metabolic cure-all.
TrendingBlack Cumin for Reduced Fasting Blood Glucose Levels
Lactobacillus acidophilus topped a meta-analysis for easing anxiety in IBS patients — the same analysis found it did nothing for quality of life.
- 2025-08-25
- Systematic Review
- n = 3,154
- European journal of gastroenterology & hepatology
This is one of the first systematic reviews to rank probiotics for mental health in IBS, but the evidence comes from a network of trials that were not double-blind, and the result hasn't been replicated — so treat the novelty with caution.
TrendingLactobacillus acidophilus for Reduced Anxiety
240 mg/day of Ginkgo biloba extract improved cognition in mild dementia (p = 0.04) — but only in those already struggling with memory
- 2025-02-03
- Meta-Analysis
- n = 782
- The world journal of biological psychiatry : the official journal of the World Federation of Societies of Biological Psychiatry
This is among the first solid pieces of evidence for Ginkgo on cognition in a clinical setting, but because everyone in the study had mild dementia, the results don't apply to healthy people looking for a mental boost — and as an early finding, it needs replication.
New evidenceGinkgo for Improved Cognition
High-dose vitamin C before and after gallbladder surgery failed to reduce pain or opioid use in a 320-patient trial.
- 2026-04
- RCT
- n = 320
- Journal of perianesthesia nursing : official journal of the American Society of PeriAnesthesia Nurses
This well-designed, randomized trial challenges the popular notion that vitamin C helps with acute postoperative pain, but because it's among the first studies on this specific question, the picture isn't settled yet.
Myth-busterVitamin C for Reduced Acute Pain