Chicken Breast

Food · Protein · Food, Typed Supps

The lean protein most diets are built around by default.

Stage by stage

Intake (Dense protein structure): Chewing and stomach acid begin breaking down its dense muscle protein structure.
Stomach (Protein digestion begins): Protein-digesting enzymes start cleaving the protein into smaller chains.
Small intestine (Amino acids & B vitamins absorbed): Amino acids are absorbed along with B vitamins naturally present in the meat.
Muscle & cells (Protein synthesis): Absorbed amino acids are used for muscle repair and countless other protein-building processes.

Timing

Any meal; protein needs are best met by spreading intake across the day rather than one large serving.

Time to effect

Hours: Amino acids are absorbed and available for muscle repair within a few hours.

Allergens

None of the fourteen major allergens. Derived from what this food is, not from a product label.

Eating patterns

Fits: Keto, Low-FODMAP, Gluten-free. Depends on the product: Halal, Kosher.

Satiety

153 on the satiety index, where white bread is 100 — high. Modelled from the Holt et al. (1995) measurements.

Environmental footprint

9.9 kg CO2e and 660 litres of freshwater per kg, matched to "Poultry meat" in Poore & Nemecek (2018), Science 360.

Cost band

Mid — roughly £7 per kg, as a band midpoint rather than a price.

Key nutrients

Complete protein
Niacin (B3)
Vitamin B6
Selenium

Nutrition per 100g

Calories: 159.2
Protein: 20.2g
Carbohydrate: 0g
of which sugars: 0g
Fat: 8.7g
of which saturated: 2.7g
Fibre: 0g
Sodium: 46mg

Food vs. supplement

A 3.5oz serving of chicken breast provides about 31g of complete protein — comparable to 1–1.5 scoops of whey protein powder — plus B vitamins and selenium a protein powder alone doesn’t include.

Kitchen tip

Brining or marinating for even 30 minutes before cooking helps it stay moist, since lean breast meat dries out easily at high heat.

Common myth

“Chicken breast is nutritionally empty besides protein.” In reality: It’s also a meaningful source of niacin, B6, and selenium — not just a protein delivery vehicle.