Question 1

Why are some foods more filling than others?

Accepted Answer

Because satiety is driven by **several mechanisms that have little to do with calories** — and foods engineered to be easy to overeat are engineered to defeat each one of them.

**What actually produces fullness:**

**Volume and weight.** Stretch receptors in the stomach respond to how much is there physically, not energetically. **Water and fibre add volume without energy**, which is why soup and vegetables fill you disproportionately.

**Protein**, consistently the most satiating macronutrient per calorie, acting through gut hormones and possibly through a protein-seeking drive that continues until intake is met.

**Fibre**, slowing gastric emptying, adding volume, and feeding gut bacteria that produce satiety-signalling compounds.

**Energy density** — calories per gram — which is arguably the single most important variable. **At equal weight of food, lower energy density means fewer calories consumed for the same fullness.**

**Texture and eating rate.** Foods requiring chewing take longer to eat, and satiety signals take roughly 20 minutes to register. **Liquid calories barely register at all**, which is why drinks are so easily added on top of a full day's intake.

**Why highly processed foods are easy to overeat.** They tend to combine **high energy density, low fibre, low protein, soft texture and rapid eating rate** — every satiety mechanism working against you simultaneously. Combinations of fat and refined carbohydrate rarely found together in nature appear to be particularly easy to consume in quantity.

**What this means practically:**

**Judge food by energy density**, not by whether it is labelled healthy. Nuts are excellent food and very energy dense.

**Front-load protein and fibre** at meals.

**Eat slowly and with texture retained** — whole fruit rather than juice, intact grains rather than flour.

**Drink water with meals**, though the effect is modest and temporary.

**Sleep**, since deprivation shifts appetite hormones toward hunger.

General information, not dietary advice.

Question 2

Why does fibre matter?

Accepted Answer

Because it is the part of food your body cannot digest, and almost everything useful about it follows from that — including feeding the bacteria that can. What it is. Plant carbohydrates that resist

Question 3

What does bioavailability mean in nutrition?

Accepted Answer

The proportion of a nutrient that is actually absorbed and available for use — as distinct from the amount present in the food. It is why the number on a label can substantially overstate what you

Question 4

What does the evidence say about ultra-processed food?

Accepted Answer

The association with poor health outcomes is reasonably consistent; why is much less settled, and that gap matters for what anyone should actually do. What the term means. It comes from the NOVA

Question 5

Why does weight loss slow down even when you keep eating the same?

Accepted Answer

Because the target moves. A calorie deficit is the difference between what you eat and what you burn, and the amount you burn falls as you lose weight — so the same intake produces a progressively

Question 6

What should a beginner include in a keto diet meal plan?

Accepted Answer

A beginner's keto diet meal plan should include healthy fats, low-carb vegetables, moderate protein, and wise snack choices to promote ketosis and overall health.

Question 7

Is a calorie on a label the same as a calorie your body gets?

Accepted Answer

No — the label is a reasonable estimate, not a measurement of what you absorb, and several factors mean the number on the packet and the energy your body extracts differ. How labels are calculated.

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