Nutrition
Brain fog isn't aging, it might be these five foods
Dr. Mark Hyman explains how the gut-brain axis drives brain fog, and the five foods that most often trigger it.
Can you build muscle in a calorie deficit? The data
Dr. Eric Helms explains when body fat, not calories, decides whether you gain muscle in a deficit, at maintenance, or in a surplus.
Peter Attia on hormone therapy, testosterone and toxins
Optispan's doctors fact-check Peter Attia's rapid-fire on hormone therapy, testosterone, seed oils and microplastics.
Fatty liver disease is silent in nearly a third of adults
A hepatologist explains why fatty liver often goes unnoticed, why fibrosis matters more than fat, and how FIB-4 and fibroscan catch it early.
Carnivore diet myths: saturated fat, fiber, and LDL
Dr. Berry answers carnivore diet questions on fat, fiber, and LDL cholesterol, debunking the biggest myths people worry about before starting.
What mitochondria really do beyond powering your cells
Biochemist Jared Rutter on how mitochondria decide whether a cell spends energy being itself or building more, and why overbuilding drives disease.
Fiber maxing: who it helps and who should be careful
Fiber feeds your microbiome, blunts glucose spikes, and triggers natural GLP-1, but pushing to 50 grams backfires if you have IBS or SIBO. Here is how to do it right.
How your gut microbiome translates diet and stress into health
Microbiome scientist Emeran Mayer on how gut microbes turn food, stress, and toxins into inflammation or health, and why diet beats any single probiotic.
Why more muscle alone will not fix metabolic health
Muscle is where glucose goes and where insulin resistance shows up first, but one leg studies and a large review show that gaining muscle mass is not the fix.
Five lessons on metabolic health from 25,000 patients
A doctor who treated 25,000 patients shares five lessons on metabolic health, from catching diabetes early with fasting insulin to why hunger beats willpower.
Red light on your back lowers blood sugar spikes by 28%
A placebo controlled trial found 15 minutes of 670 nm red light on the upper back cut glucose spikes by 28 percent. Here is the mechanism and how to use it.
How your gut health could be driving your ADHD symptoms
Functional medicine research links leaky gut and microbiome imbalances to ADHD, and shows how diet and gut repair can improve focus.
Ketogenic diet and mental health: the mitochondria link
Psychiatrist Chris Palmer on how the ketogenic diet, born to treat epilepsy, can ease depression, bipolar disorder and psychosis by renewing brain mitochondria.
Why sardines help repair a fast-renewing gut and liver
Your gut lining rebuilds every 3 to 5 days and needs dietary nucleotides no supplement provides. Here is why sardines fill that gap.
The immune switch that turns chronic inflammation on
Meet the NLRP3 inflammasome, the immune switch behind chronic inflammation and aging, and the daily habits that help turn it back off.