Nutrition Science

A Vegan Diet Changed Markers Tied to Aging

A four-week trial found shifts in DNA methylation and immune patterns, but it did not show that participants aged more slowly.

Fecal Transplants Raised Peanut Tolerance in Small Trial

Six of 15 adults tolerated more peanut months after treatment, but the experimental therapy did not eliminate their allergies or prove a lasting cure.

Edible Coating Helps Strawberries Stay Fresh Longer

A seaweed-derived coating reduced moisture loss and mold in laboratory tests, but researchers have not yet shown how it performs in stores, homes or commercial supply chains.

Omega-3 Heart Rhythm Risk May Depend on Dose

A large analysis found a modest increase in atrial fibrillation among high-risk patients taking larger doses, while lower-dose supplements were not tied to a clear rise in risk.

Beetroot Juice Shows Early Promise for Pregnant Women with Kidney Disease

A small randomized trial found encouraging safety signals and possible benefits, but it was not designed to prove the supplement improves outcomes.

Multi-Plant Blend Changed More Gut Bacteria Than One Probiotic Strain

In a six-week company-funded trial, a powdered blend containing more than 30 plant ingredients produced broader microbiome changes than a single-strain probiotic, but broader changes do not necessarily mean better health.

Eating Less Protein May Affect Aging, but Human Evidence Is Limited

A review of more than 350 studies found biological reasons lower-protein diets could support longevity, but most lifespan evidence comes from animals and reducing protein may be harmful for some older adults.

U.S. Honey Met Organic Pesticide Limits Without Certified Foraging Land

Honey from organically managed colonies on six Northeastern farms had pesticide residue levels comparable to imported organic honey, but the findings do not mean the honey was pesticide-free or eligible for organic certification.

Early-Life Sugar Rationing Was Linked to Lower Dementia Risk Decades Later

A study of nearly 65,000 people born around the end of British sugar rationing found an association between lower sugar exposure early in life and later brain health, but it cannot show that sugar caused the difference.

Genes May Shape LDL Response to Saturated Fat on a Low-Carb Diet

A secondary analysis of a randomized diet trial suggests inherited risk may help explain why some people experience larger cholesterol increases than others.

The Body May Make Some Compounds Credited to Gut Bacteria

Two laboratory studies suggest the microbiome is only part of the story, while offering early clues about how fiber and hard-to-digest plant proteins may influence the chemicals produced in the gut.

Purple Corn Pigments Show Promise as Natural Food Coloring

Laboratory tests found that purple corn colorants held up under heat and refrigerated storage, but they are not yet a universal replacement for synthetic dyes.

Traditional Navajo Meal Program Reduced Heart Failure Hospital Visits

An eight-week program combining medically tailored meals, Navajo food traditions and practical household support reduced hospital and emergency visits over 90 days.

Gut Signals Helped Rats Remember Where They Found Food

A new animal study identified a vagus nerve pathway linking nutrients in the digestive system with food-related memory.

New Packaged Foods Showed Little Sodium Reduction After FDA Targets

A preliminary analysis found no overall decline in sodium among newly introduced products in nine major food categories after the FDA issued voluntary reduction goals, though the study did not evaluate the entire food supply or what consumers actually bought.

Food Delivery Apps Are Reshaping School Lunch

Nearly 1 in 4 teens reported using delivery services during school hours.

Most Toddler Foods in One Store Audit Were Ultraprocessed

A preliminary analysis of products sold in Austin, Texas, found that many also exceeded recommended limits for sugar, sodium, fat or calories, but processing level alone did not reliably identify the least nutritious choices.

Prebiotic Sodas Fall Between Regular Soda and Sparking Water

A preliminary product analysis found that prebiotic sodas generally contain less sugar than regular soda and more fiber than other soft drinks, but their benefits depend heavily on what they replace.

AI Calorie Apps May Miss Hundreds of Calories in a Meal

Four photo-based tracking tools underestimated calories and fat in a preliminary study of carefully prepared meals, suggesting their automatic estimates should be treated as a starting point rather than a precise measurement.

Healthier Diet Policies May Need to Look Different Across Communities

A global modeling study found large differences in diet quality and environmental effects within countries, suggesting national averages can obscure who needs support and what kind may work.

New Protein Target May Not Fit Every American

A new expert perspective questions whether evidence from weight-management research supports recommending 1.2 to 1.6 grams of protein per kilogram to adults across the lifespan.

Long-Distance Travel May Disrupt More Than Your Sleep

An athlete-focused review explores how shifting sleep and meal schedules may affect digestion and gut microbial rhythms, but direct evidence in travelers remains limited.

Popular School Meals May Need a Recipe Rethink

Researchers analyzed representative recipes for common cafeteria foods as schools prepare for tighter federal limits on added sugars and sodium.

Collagen Supplements Changed Some Bone Markers in Female Runners

A four-week pilot trial found changes in certain biomarkers tied to bone formation and inflammation, but it did not show that collagen strengthened bones or prevented injuries.

Scientists Are Breeding More Nutrients into Staple Crops

A new review examines how conventional breeding, genetic engineering and CRISPR could help improve the vitamin and mineral content of major crops as climate change places new pressure on food systems.