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Walnuts, kernel only

Walnuts are nuts, and the figures here describe the edible kernels only, without the shells. They mainly provide fat, along with protein and a range of vitamins and minerals. Per 100g, walnut kernels contain 69g of fat, 15g of protein and 160mg of magnesium, and provide 2837 kJ of energy.

Most of the fat in walnuts is unsaturated. Protein contributes to the maintenance and repair of body tissues, while magnesium supports normal muscle and nerve function. Their high fat content makes walnuts energy-dense, which is worth noting when monitoring energy intake. The kernels described contain little salt, although added salt in other products can change this. Full nutrient figures are provided in the tables below.

Nutrition per 100g

Nutrient

Per 100g

Energía

688 kcal

Energía

2837 kJ

Grasa

69g

of which saturates

7.5g

Carbohydrate

3.3g

of which sugars

2.6g

Proteína

15g

Sal

0.02g

Alcohol

0g

Agua

2.8g

Colesterol

0mg

Vitamins and minerals per 100g

Nutrient

Per 100g

Vitamin A (retinol equivalent)

0µg

Vitamina D

0µg

Vitamina E

3.9mg

Vitamina C

0mg

Thiamin (B1)

0.4mg

Riboflavin (B2)

0.14mg

Niacin (B3)

1.2mg

Vitamin B6

0.67mg

Vitamina B12

0µg

Ácido fólico

66µg

Calcio

94mg

Hierro

2.9mg

Magnesio

160mg

Phosphorus

380mg

Potasio

450mg

Sodio

7mg

Zinc

2.7mg

Cobre

1.3mg

Selenio

3µg

Iodine

9µg

Other types of walnuts

Alimentos

Calories per 100g

Protein per 100g

Fat per 100g

Fibre per 100g

Walnuts, kernel only, weighed with shells

295 kcal

6.3g

29g

–

About these figures

Values are per 100g of the food as described (10 samples). "Trace" means only a very small amount was found. Nutrients that were not measured are not shown. Salt is calculated from sodium.

Lecturas adicionales y referencias

  • Public Health England. McCance and Widdowson's The Composition of Foods Integrated Dataset 2021. GOV.UK.

Historial del artículo

La información en esta página está escrita y revisada por pares por clínicos calificados.
  • 4 Nov 2026 | Última versión
  • 3 Nov 2026 | Publicado originalmente