Tag: Knowledge recall

When animals are given access to a variety of highly palatable foods rather than standard chow, they massively overeat and rapidly become obese. Research by Sclafani and Rolls documented how variety and palatability drive overconsumption independent of caloric need. The modern food environment is a giant cafeteria diet experiment—endless variety, engineered palatability, and predictable results. This companion explores the original cafeteria experiments, why variety drives overconsumption (sensory-specific satiety), why palatability overrides satiety, the modern cafeteria parallels, and practical implications for simplifying your food environment. (4 min read)

Ghrelin is the “hunger hormone” that rises before your usual meal times—not because you’re running low on energy, but because your body expects food. Research by Cummings showed ghrelin peaks preprandially, before meals, not in response to fuel depletion. Crucially, hunger comes in waves: ghrelin spikes, peaks, then recedes on its own within about two hours. If you wait out the wave, it passes. You can also retrain ghrelin by changing eating patterns. This companion covers ghrelin’s role, the learned schedule, hunger waves, the circadian connection, and practical implications. (4 min read)

Four qualities create lasting satisfaction without overconsumption: high protein, high fiber, high water content, and low caloric density. Research measuring 38 foods found boiled potatoes scored 323% on the satiety index while croissants scored just 47%. Fat, surprisingly, had a negative correlation with fullness per calorie. This companion explores the satiety index, the four factors that predict fullness, why this explains which eating patterns work, and how to choose foods that satisfy naturally. (4 min read)

Protein triggers insulin, but differently than carbohydrates—through direct amino acid stimulation, not blood sugar spikes. Research by Holt on the insulin index shows protein-rich foods stimulate significant insulin despite low carb content. Protein also triggers glucagon, which partially offsets insulin’s effects. Fat has minimal insulin impact. The result: protein causes a more moderate, balanced hormonal response supporting satiety and muscle preservation. This companion covers carbs and insulin, protein and insulin, fat and insulin, and practical implications for meal design. (3 min read)

Your brain makes food decisions like an economist: weighing cost (effort, time) against expected reward. Research by Rangel shows the brain’s decision circuitry computes value based on effort and reward. Thaler and Sunstein’s work on “nudge” theory shows defaults drive choices. Lower cost + higher reward = more likely to choose. This is why convenient junk food wins. The solution: make healthy choices lower cost and unhealthy choices higher cost. This companion covers neural economics, why junk food wins, restructuring the equation, the environment lever, and defaults. (4 min read)

Health halos create permission to eat more. Research by Schuldt shows people judged organic Oreos as lower-calorie than identical conventional ones—and felt more justified skipping exercise after eating them. When food is labeled healthy, organic, or low-fat, people unconsciously eat larger portions. “Healthy” choices often lead to consuming more total calories than straightforward indulgence. This companion covers the health halo effect, the research, why it happens, and practical implications for awareness. (3 min read)

The liver is your metabolic command center—processing nutrients, regulating blood sugar, and managing fat storage. Uniquely, the liver is the only organ that can process fructose. Research by Stanhope showed that fructose-sweetened beverages increase visceral fat. When you consume fructose (from sugar, HFCS, or juice), the liver converts it directly to fat through de novo lipogenesis. Excessive fructose overwhelms the liver, causing fatty liver disease and insulin resistance. This companion covers the liver’s metabolic role, the fructose problem, why this causes NAFLD, the alcohol parallel, fructose sources, and practical implications for liver health. (4 min read)

Insulin acts like a switch: high means store fat, low means release it. Research by Ludwig on the carbohydrate-insulin model shows chronically elevated insulin keeps fat cells in perpetual storage mode. When you eat, insulin signals fat cells to take up fatty acids and blocks their release. During fasting, the brake lifts. This companion covers insulin’s dual role, the fasting state, why meal timing matters, and practical applications including creating insulin gaps. (3 min read)

Because it doesn’t need to—and evolution wouldn’t allow it. During short-term fasting, the body has ample fat stores to burn and hormonal changes (especially elevated growth hormone) actively protect muscle tissue. Burning muscle for fuel would be counterproductive: you need muscles to hunt and gather more food. The body preferentially burns fat and preserves lean tissue because that’s what keeps you alive. This companion explores the evolutionary logic, hormonal protection mechanisms, the research on fasting and muscle retention, when muscle loss does happen, and the myth’s origin. (4 min read)

Willpower depletes with use. Every decision you make, every temptation you resist, draws from the same finite pool—which is nearly empty by evening, exactly when you face the most tempting foods. Research on ego depletion shows that resisting cookies on one task impairs performance on subsequent self-control tasks. This companion explores the resource model, why evenings are vulnerable, why willpower alone fails long-term, and what works better: environment design, habits, and identity change. (3 min read)