Latest Research

Recent studies, explained simply — with the receipts.

What the researchers actually did, what they actually found, and how much weight the result deserves. Every write-up links to the real paper — no press releases, no news aggregators.

Study types

Meta-Analysis03
Systematic Review01
Randomized Controlled Trial03
Cross-Sectional Study01

8 write-ups · every paper linked

IntegrationMeta-Analysis

People who did more physical activity tended to have a lower biological age on some epigenetic clocks

Pooling 7 studies of over 145,000 people, researchers found higher physical activity was linked to a lower biological age on two epigenetic clocks (Horvath and GrimAge) — but not on two other commonly used clocks — and the underlying data cannot establish cause and effect.

Apr 29, 2026·3 min read

FoundationsRandomized Controlled Trial

Six mornings of dim indoor light raised evening cortisol and disrupted sleep in healthy adults

In a small randomized trial, healthy adults exposed to dim morning light for six days showed higher evening cortisol and reduced, disrupted sleep compared with those given brighter morning light — patterns that resemble early signs of depression.

Nov 1, 2025·3 min read

Body SystemsCross-Sectional Study

Popular glucose monitors did not reliably reflect real blood sugar control in people without diabetes

Comparing wearable glucose monitor data with the standard HbA1c blood test in 972 adults, researchers found the two measures lined up well in people with diabetes, but the link largely disappeared in people with prediabetes or normal blood sugar.

Oct 1, 2025·3 min read

Fuel & RecoverySystematic Review

A new review challenges Zone 2 cardio as the single best training intensity

A 2025 review argues the evidence does not support easy Zone 2 cardio as uniquely optimal, and that higher-intensity training may offer more benefit for most people, especially with limited training time.

Jul 1, 2025·3 min read

Fuel & RecoveryMeta-Analysis

A large pooled analysis found a modest but consistent link between ultra-processed food and earlier death

Combining 18 long-term studies covering over 1.1 million people, researchers found the people eating the most ultra-processed food had a 15% higher risk of death from any cause than those eating the least.

Mar 3, 2025·3 min read

Mind & Nervous SystemRandomized Controlled Trial

Cutting smartphone use to under 2 hours a day improved mood, stress, and sleep in three weeks

In a randomized trial, healthy adults who cut smartphone use to 2 hours a day for three weeks saw meaningful drops in depressive symptoms and stress, plus better sleep, compared with a group that kept their usual phone habits.

Feb 21, 2025·3 min read

Body SystemsRandomized Controlled Trial

Adding myo-inositol to metformin improved insulin resistance and cycle regularity in PCOS

In a 196-person trial, women with PCOS given a metformin plus myo-inositol combination were more likely to see their insulin resistance and menstrual regularity improve over 24 weeks than those on metformin alone.

Dec 12, 2024·3 min read

Everyday Care & SafetyMeta-Analysis

Creatine supplements were linked to modest memory and processing-speed gains in a pooled analysis

Pooling 16 randomized trials, researchers found creatine supplementation was linked to small but significant improvements in memory, attention time, and processing speed in adults.

Jul 12, 2024·3 min read