Browse the newest Practical Health Science explainers, myth checks, research breakdowns, and practical takeaways.
Magnesium may modestly improve some sleep symptoms in some people, but the overall evidence remains inconsistent and low-certainty. Here is what the latest randomized trials and systematic reviews actually show.
People who are more physically active have a lower risk of several cancers, including breast, colon, endometrial, kidney, and bladder cancer. Exercise may help through multiple biological pathways, but it cannot eliminate cancer risk.
Collagen supplements are not useless but they are also not a universal anti-aging solution. Evidence is most promising for some joint and tendon outcomes, while benefits for skin are less certain than marketing often suggests.
Inflammation is a normal immune response to injury, infection, and cellular stress. Acute inflammation helps protect and repair tissues, while persistent low grade inflammation can contribute to chronic disease.
Intermittent fasting is an effective weight-loss strategy, but most research does not show a major advantage over conventional calorie restriction. The best approach may be the one you can actually maintain.
Walking after a meal can reduce the short-term rise in blood glucose, especially compared with remaining seated. The effect is real, although its long-term importance depends on your overall activity and metabolic health.
Zone 2 cardio can improve aerobic fitness and makes it easier to accumulate substantial exercise volume. But research does not show that Zone 2 is uniquely superior to other exercise intensities for longevity.
Insulin resistance happens when tissues such as muscle, liver, and fat respond less effectively to insulin. Blood sugar may remain normal for years while the pancreas compensates by producing more insulin.
GLP-1 weight-loss drugs can reduce lean mass along with fat. But most of the weight lost is fat, and current evidence does not show that lean-mass loss automatically translates into muscle weakness or pathological muscle wasting.
Fasted cardio can increase the amount of fat your body uses for fuel during exercise. But controlled studies have not shown that this reliably leads to greater body-fat loss over time.
Creatine has long been blamed for hair loss because of concerns about DHT. But the original claim came from one small study, and the first trial to directly measure hair health found no evidence that creatine caused thinning or hair loss.
