Protein, fats, carbohydrates, fiber, vitamins, minerals, calories and food composition explained with practical context.
Chia stands out mainly for fiber and ALA omega-3. A 1 oz (28 g) serving provides about 138 calories, 4.7 g protein, 9.8 g fiber, and roughly 5 g ALA. It is nutrient-dense in a small portion, but it usually works better as a protein contributor than as the main protein source in a meal.
Chia and flax are nutritionally similar but not identical. Per 1 oz, chia provides about 9.8 g fiber and 5.0 g ALA; flax provides about 7.7 g fiber and 6.4 g ALA. Flax is best eaten ground so its nutrients are easier to access, while chia can be eaten whole.
Almonds are concentrated foods: 100 g provides about 579 calories, 21 g of protein, 12.5 g of fiber and 50 g of fat. A more realistic 1-ounce serving provides about 164 calories, 6 g of protein, 3.5 g of fiber and 14 g of fat, mostly monounsaturated. Almonds are also notable for vitamin E and magnesium.
A 1-ounce serving of walnuts provides about 185 calories, 4.3 g of protein, 1.9 g of fiber and 18.5 g of fat. Their distinctive feature among common nuts is ALA: roughly 2.5 g of this plant omega-3 per ounce. ALA is not the EPA or DHA found in fish, but it is an essential fatty acid the body cannot make.
In a 1-ounce serving, almonds provide about 164 calories, 6 g of protein and 3.5 g of fiber; walnuts provide about 185 calories, 4.3 g of protein and 1.9 g of fiber. Walnuts, however, provide roughly 2.5 g of ALA omega-3, while almonds are far richer in vitamin E. Neither wins every category.
One hundred grams of avocado provides about 14.7–15 g of fat: roughly 9.8–10 g monounsaturated, 1.8 g polyunsaturated and 2.1 g saturated. A 50 g portion provides about 7.3 g of fat, while an avocado with 200 g of edible flesh contains close to 29 g. That is why 'one avocado' is not a useful fixed serving without knowing its size.
Coconut oil is one of the most concentrated common sources at roughly 80–85 g of saturated fat per 100 g; butter, palm oil and animal fats are also high. But 100 g is not a realistic serving of cooking fat: one tablespoon of coconut oil provides about 11–12 g of saturated fat, while an ounce of cheddar provides roughly 5–6 g.
Avocado and olive oil share a fat profile dominated by oleic acid, but they are not equivalent foods: 100 g of avocado provides about 160 calories, 15 g of fat and 6–7 g of fiber; one tablespoon of olive oil provides about 120 calories and 14 g of fat with virtually no fiber or protein. Avocado is a water-rich whole food; oil is concentrated fat.
A useful comparison is not 100 g versus 100 g: 100 g of avocado provides about 160 calories, while 1 ounce of almonds provides about 164. At similar calories, almonds supply more protein and concentrated fat; avocado provides much more water and volume and still delivers substantial fiber. Both are rich in unsaturated fats but play different roles.
Fat can contribute to satiety because it triggers digestive signals, can slow stomach emptying and makes meals more palatable and satisfying. But fat is also the most energy-dense macronutrient at about 9 calories per gram. That is why an ounce of nuts or half an avocado does not behave like several tablespoons of oil: food structure, fiber, protein, water and portion size matter.
Oils lead by concentration because they are almost pure fat: olive oil provides roughly 70–75 g of monounsaturated fat per 100 g. Among whole foods, macadamias, hazelnuts, pecans and almonds stand out. In real portions, a tablespoon of olive oil provides about 10 g of monounsaturated fat and an ounce of macadamias about 17 g.
Linoleic-acid-rich oils contain the most polyunsaturated fat by weight; conventional sunflower oil can be around 65 g per 100 g. Among whole foods, walnuts provide roughly 47 g/100 g, with flax and chia also ranking high. But the total hides an important distinction: sunflower oil is mostly omega-6, while flax and chia are notable for ALA, a plant omega-3.