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Walnut, per 100 g: 654 kcal, 15.2 g protein, 13.7 g carbohydrate, 6.7 g fibre, 65.2 g fat. Figures are the USDA reference values for “Nuts, walnuts, english”.

At 100 g it reaches the EU threshold to be called a source of manganese, copper, phosphorus, folate. The table below gives the full composition, and every claim listed underneath is quoted from the EU register rather than written by us.

High fibre6.7 g fibre per 100 gLow sugars2.6 g sugars per 100 gSodium-freeUnder 5 mg sodium per 100 g

Nutritional value per 100 g

NutrientPer 100 g% NRV
Energy and macronutrients
Energy654 kcal
Protein15.2 g
Fat65.2 g
of which saturates6.13 g
of which monounsaturates8.93 g
of which polyunsaturates47.2 g
Carbohydrate13.7 g
of which sugars2.61 g
of which starch0.06 g
Fibre6.7 g
Water4.07 g
Cholesterol0 mg
Minerals
Calcium98 mg12.3%
Iron2.91 mg20.8%
Magnesium158 mg42.1%
Phosphorus346 mg49.4%
Potassium441 mg22.1%
Sodium2 mg
Zinc3.09 mg30.9%
Copper1.59 mg159%
Manganese3.41 mg171%
Selenium4.9 µg8.91%
Vitamins
Vitamin A1 µg0.125%
Vitamin D0 µg
Vitamin E0.7 mg5.83%
Vitamin K2.7 µg3.6%
Vitamin C1.3 mg1.63%
Thiamine (B1)0.341 mg31%
Riboflavin (B2)0.15 mg10.7%
Niacin (B3)1.13 mg7.03%
Pantothenic acid (B5)0.57 mg9.5%
Vitamin B60.537 mg38.4%
Folate98 µg49%
Vitamin B120 µg

% NRV is the nutrient reference value for an average adult, as set in Annex XIII of Regulation (EU) 1169/2011. A blank cell means no reference value is defined for that nutrient, not that it is unimportant.

What this food is a source of

This food reaches the legal threshold for the claims below. The wording is quoted exactly from the EU register of authorised health claims — we have not written or paraphrased any of it.

High in Manganese171% NRV per 100 g
  • Manganese contributes to normal energy-yielding metabolism
  • Manganese contributes to the maintenance of normal bones
High in Copper159% NRV per 100 g
  • Copper contributes to normal energy-yielding metabolism
  • Copper contributes to the protection of cells from oxidative stress
High in Phosphorus49.4% NRV per 100 g
  • Phosphorus contributes to the maintenance of normal bones
  • Phosphorus contributes to normal energy-yielding metabolism
High in Folate49% NRV per 100 g
  • Folate contributes to normal blood formation
  • Folate has a role in the process of cell division
High in Magnesium42.1% NRV per 100 g
  • Magnesium contributes to normal energy-yielding metabolism
  • Magnesium contributes to normal muscle function
High in Vitamin B638.4% NRV per 100 g
  • Vitamin B6 contributes to normal energy-yielding metabolism
  • Vitamin B6 contributes to normal homocysteine metabolism
High in Thiamine (B1)31% NRV per 100 g
  • Thiamine contributes to normal energy-yielding metabolism
  • Thiamine contributes to the normal function of the heart
High in Zinc30.9% NRV per 100 g
  • Zinc contributes to normal cognitive function
  • Zinc contributes to the normal function of the immune system
Source of Potassium22.1% NRV per 100 g
  • Potassium contributes to normal muscle function
  • Potassium contributes to the maintenance of normal blood pressure
Source of Iron20.8% NRV per 100 g
  • Iron contributes to normal formation of red blood cells and haemoglobin
  • Iron contributes to the reduction of tiredness and fatigue
Where these numbers come from. Composition data: USDA FoodData Central, SR Legacy release, entry Nuts, walnuts, english (FDC ID 170187). Values are per 100 g of the food as described, and real foods vary with variety, season, soil, storage and cooking. Claim thresholds: Regulation (EC) 1924/2006. Claim wording: Regulation (EU) 432/2012.
This is reference information, not personal advice. Nutrient content is one small part of a diet, and no single food prevents or treats disease. If you are pregnant, managing a medical condition, or taking medication — particularly anticoagulants, thyroid medication or immunosuppressants, where diet can interact — ask your doctor or pharmacist before making changes.