Why things work, and where the record has been bent. We read the mainstream and the fringe with the same skepticism: who funded it, what was buried, and what the evidence actually shows. For the searchable database of every graded claim, use Research.
How the Body Works 20
The physiology and mechanisms under the practices, explained plainly. Start here to understand why something works.
- Neuroplasticity is the brain's ability to reshape its own wiring across your whole life.
- How the body handles glucose after a meal: muscle takes up most of it, and contracting muscle pulls it in even when insulin can't, plus what HbA1c and a monitor really tell you.
- Penicillin from a mold, aspirin from willow bark, taxol from the Pacific yew, morphine from the opium poppy. Fifty-nine drug classes traced back to the organism they were found in, with the discovery recorded as it happened.
- Chemical marks switch genes up or down without changing the DNA. What smoking, exercise, and famine really show, and where reprogram-your-genome claims outrun the evidence.
- Morning light sets your body clock and evening light delays it, while meals set a second clock in the gut. The human clock runs 24.2 hours, and how to keep it in step.
- The mouth is its own microbial ecosystem: it drives tooth decay and gum disease and ties to heart and blood-sugar risk. Treating gum disease even lowered HbA1c in diabetes.
- Trillions of gut microbes shape metabolism and immunity, yet most tests and supplements sold on that fact are not proven in people. What reliably shapes it, and the one clear win.
- Skeletal muscle clears most of your blood sugar, releases signaling proteins when it contracts, and its strength is one of the sharpest predictors of how long you live.
- A controlled stress the body over-compensates for: the logic behind heat, cold, fasting, and training. Why the helpful dose window is narrow, and where the idea gets oversold.
- The vessel lining makes nitric oxide to widen the artery, and it fails early, before stiffness sets in. Exercise and nitrate-rich greens raise it; L-arginine pills did not.
- The body turns physical force into biological signal: loaded cells strengthen bone and tendon, unloaded ones waste. The machinery behind use-it-or-lose-it, and what acts on it.
- Mitochondria turn food and oxygen into energy, and exercise reliably builds more of them. Why that adaptation is solid, and why most mitochondrial supplement claims are not.
- The HPA axis runs the stress response, and the acute version is meant to fire and shut off. What chronic activation costs, and where the popular cortisol story runs past the evidence.
- Repeated heat and cold retrain how the body holds core temperature. Brown fat is real; the cold-makes-you-lean claim is not; and falling asleep needs the core to cool.
- The gut makes about 90% of the body's serotonin, but it cannot reach the brain. What the vagus nerve and gut microbes really do, and where the popular gut-brain story is oversimplified.
- Acute inflammation heals you and shuts off; the low-grade chronic kind tied to heart disease and diabetes is the problem. What lowers it, and why CRP is a marker, not a target.
- Aging is a set of cellular processes you can partly slow with basic health habits. What the twelve hallmarks mean, and where anti-aging molecules really stand.
- The molecule most often named when people say exercise is good for the brain. BDNF supports neuron survival, synaptic plasticity, and new hippocampal cells.
- Many adults fall short on key vitamins and minerals. The triage theory says the body rations scarce nutrients toward survival and skimps on long-term repair.
The Evidence, Examined 7
Where the money, the incentives and the buried findings shape what gets called settled. Read with the follow-the-evidence lens.
- The documented record of how funding, ghostwriting and buried data have shaped nutrition and medical research, from the sugar industry's 1967 review to the skew in sponsor-funded trials, and the reading method that lets you see past it: spot the funding, look for preregistration, favor hard endpoints, and lean on replication.
- What the research actually shows about dietary fat: saturated fat on its own has little independent tie to heart disease, what you replace it with sets the benefit, eating fat does not by itself make you fat, low-fat diets did not deliver the promised weight loss, and industrial trans fat is the one fat that clearly raises heart disease risk.
- Microplastics and the plastic chemicals BPA and phthalates are now measurable throughout the body.
- Fluoride toothpaste is one of the best-supported ways to prevent tooth decay, working on contact with the enamel. Adding it to water also cut decay, though the extra benefit has shrunk in the toothpaste era.
- Remdesivir and ivermectin were the two most-argued COVID-19 treatments.
- The best evidence on the mRNA COVID-19 vaccines points in more than one direction at once, and this page reports all of it at its true strength.
- What cancer metabolism actually is, why the idea that sugar feeds cancer and a ketogenic diet starves it runs ahead of the human evidence, and the real link between metabolic health and cancer risk.
The Frontier 4
Emerging and mind-body science at the edge of what is known, where the interesting questions still sit.
- The placebo effect is a real physiological event: healing systems switching on from expectation. Open-label placebos helped even when people knew, and the nocebo is its flip side.
- Expectation alone moves symptoms, so improving after a treatment proves little. Why a matched placebo group is the only way to know what a treatment is worth.
- How outside rhythms couple to the body's own: breath and the baroreflex, light and the circadian clock, sound and brain waves, and where the healing hype diverges.
- Every cell holds a voltage. What bioelectricity is, where the science is established, where it is still frontier, and where the healing claims outrun it.
31 science pages. Educational content, not medical advice.