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Grapefruit, per 100 g: 30 kcal, 0.6 g protein, 7.5 g carbohydrate, 1.1 g fibre, 0.1 g fat. Figures are the USDA reference values for “Grapefruit, raw, pink and red, Florida”.

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

Fat-freeUnder 0.5 g fat per 100 gSodium-freeUnder 5 mg sodium per 100 gLow energy30 kcal per 100 g

Nutritional value per 100 g

NutrientPer 100 g% NRV
Energy and macronutrients
Energy30 kcal
Protein0.55 g
Fat0.1 g
of which saturates0.014 g
of which monounsaturates0.013 g
of which polyunsaturates0.024 g
Carbohydrate7.5 g
Fibre1.1 g
Water91.6 g
Cholesterol0 mg
Minerals
Calcium15 mg1.88%
Iron0.12 mg0.857%
Magnesium8 mg2.13%
Phosphorus9 mg1.29%
Potassium127 mg6.35%
Sodium0 mg
Zinc0.07 mg0.7%
Copper0.044 mg4.4%
Manganese0.01 mg0.5%
Selenium1.4 µg2.55%
Vitamins
Vitamin A13 µg1.63%
Vitamin D0 µg
Vitamin C37 mg46.3%
Thiamine (B1)0.04 mg3.64%
Riboflavin (B2)0.02 mg1.43%
Niacin (B3)0.2 mg1.25%
Pantothenic acid (B5)0.283 mg4.72%
Vitamin B60.042 mg3%
Folate9 µg4.5%
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 Vitamin C46.3% NRV per 100 g
  • Vitamin C contributes to the normal function of the immune system
  • Vitamin C contributes to normal collagen formation for the normal function of blood vessels
  • Vitamin C increases iron absorption
Where these numbers come from. Composition data: USDA FoodData Central, SR Legacy release, entry Grapefruit, raw, pink and red, Florida (FDC ID 174675). 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.