Tag: Knowledge recall

Fiber slows digestion and absorption, producing a smaller, slower insulin response to the same carbohydrates. When you eat an apple versus apple juice, the sugar is similar but the metabolic outcome is completely different — fiber creates a physical barrier, delays gastric emptying, and adds bulk without calories. Modern processing systematically removes fiber, stripping away nature’s built-in protection. This companion explores the mechanism, the apple vs. juice example, fiber’s multiple protective effects, and practical implications for eating carbohydrates with their fiber intact. (4 min read)

During a 24-36 hour fast, growth hormone rises, adrenaline (norepinephrine) elevates, and metabolic rate does not fall — the opposite of what most people expect. One study of eleven lean subjects measured resting expenditure rising up to ~14%; a larger trial found about half that at 36 hours and no significant change in men, so treat the rise as real but uneven and the no-slowdown as the solid part. This companion explores the growth hormone surge and what it does and does not settle about muscle, the norepinephrine increase and why the metabolic rise cannot be pinned on it, what…

Every major religion includes fasting traditions. Over a billion Muslims fast during Ramadan; Jews fast on Yom Kippur; Christians have Lent. If fasting were dangerous, these traditions would have died out. The fact that humans have fasted throughout history — voluntarily and involuntarily — suggests it’s normal physiology, not something extreme. This companion explores the religious traditions, what universality suggests, the safety implication, the therapeutic history, and what traditional wisdom doesn’t tell us. (4 min read)

Insulin locks the body in fat-storage mode. When insulin is elevated, your body prioritizes storing incoming energy and blocks access to existing fat stores. The behaviors that keep it chronically elevated: eating frequently, eating refined carbohydrates, and never allowing enough time between meals for insulin to fall. This companion explores how insulin controls fat storage, what keeps it elevated, the chronic elevation problem, and how to let it fall. (4 min read)

White bread has a glycemic index of 75; table sugar is 65. Refined grains spike blood sugar faster than sugar itself because milling removes fiber, bran, and germ, leaving pure starch that converts rapidly to glucose. The rapid spike triggers a correspondingly large insulin response. This companion explores the glycemic index surprise, why this happens mechanically, the insulin response pattern, what “complex carbohydrates” actually means, and practical implications for choosing foods. (4 min read)

The three most common fears about fasting — losing muscle, entering starvation mode, damaging metabolism — each get the timescale wrong. During a short fast, growth hormone rises measurably, resting energy expenditure does not fall, and the body burns stored fat. Two qualifiers belong with that reassurance rather than after it: past roughly sixty hours the metabolic picture changes, and the measured rise in expenditure was smaller in the larger trial and did not reach significance in men. What survives both is the answer to the fear — short fasting does not slow your metabolism down. This companion examines each…

Insulin resistance means your cells have stopped responding normally to insulin’s signal, requiring higher and higher insulin levels to achieve the same effect. One proposed driver is chronically elevated insulin from constant eating and refined carbohydrates — a model whose underlying physiology is undisputed but whose evidence in humans its own proponents call inconclusive. This companion explores how resistance develops, what the fasting trials do and don’t show, and the reversal process of restoring sensitivity. (5 min read)

Your brain evolved to seek calorie-dense food under scarcity, and roughly ten thousand years of cultural evolution hasn’t changed the genome — that gap is what “evolutionary mismatch” names. Modern foods exploit it from both ends. Hyperpalatable foods trigger dopamine responses resembling those of addictive substances, and dopamine governs wanting more than liking, so craving can persist without matching pleasure. Meanwhile satiety fails by design: on an ultra-processed diet people ate 508 calories a day more while reporting no difference in pleasantness, hunger, or fullness — and their appetite hormones didn’t move. This companion covers the environment that built your…

Fasting and chronic calorie restriction create different hormonal environments. Restriction signals scarcity, triggering the body to slow metabolism and conserve energy. Fasting triggers the opposite — norepinephrine rises, growth hormone surges, insulin drops, and the body mobilizes stored fat while keeping metabolic rate stable or elevated. On that model the difference is not in the calories but in the hormones — an argued framework rather than a settled one. This companion explores the calorie restriction problem and metabolic adaptation, the hormonal cascade that makes fasting different, what the measured contrast between the two actually shows, and why meal timing matters…

Food advertising targets the same neural pathways as food itself. Viewing food images activates reward-related brain regions and raises measurable markers of appetite — salivation among them — a response researchers call visual hunger. Conditioned food cues do this independently of whether you are actually hungry. Your cravings after seeing an ad aren’t genuine hunger; they’re manufactured desire. This companion covers the neuroscience of food cues, advertising techniques, and reducing exposure. (4 min read)