Grapefruit Nutrition Facts
A 100 g serving of grapefruit contains 32 kcal, 0.6g protein (lime), 0.1g fat (pink) and 8g carbohydrate (blue). It's higher in sugar, with 7g per serving, and provides little fiber. Its other nutrient values are modest — see the full breakdown below.
Core Nutrients per 100 g
PER 100 G SERVINGThe six values MacroDrop shows on every meal card: energy, the three macros, fiber and sugars.
Extended Nutrients
PER 100 G SERVINGGrouped as in the app: lipids, minerals, vitamins and other compounds sit one level below the core six. Daily values follow the FDA 2,000 kcal reference.
Understanding Grapefruit Nutrition
Grapefruit is a nutrient-dense fruit prized for its natural sugars, fiber and vitamin content. At 32 kcal per 100 g serving, it provides 0.6g of protein, 8g of carbohydrate and 0.1g of fat. Grapefruit is particularly rich in vitamin C, delivering 34mg — 38% of the daily value — in a single serving. It's higher in sugar, with 7g per serving, and provides little fiber.
For athletes and anyone tracking macros, grapefruit is a straightforward source of carbohydrate energy, useful around training for topping up glycogen. Its fiber and micronutrient content makes it a useful addition to a balanced macro split without pulling calories too high.
Frequently Asked Questions
How many calories are in a 100 g serving of grapefruit?
A 100 g serving of grapefruit has 32 kcal, 0.6g protein, 0.1g fat and 8g carbohydrate.
How much protein is in grapefruit?
0.6g per 100 g serving.
Is grapefruit high in sugar or fiber?
It's higher in sugar, with 7g per serving, and provides little fiber — 1.1g fiber and 7g sugar per 100 g serving.
Which nutrients is grapefruit richest in?
No single micronutrient stands out sharply — see the full breakdown below.
Is grapefruit good for tracking macros?
For athletes and anyone tracking macros, grapefruit is a straightforward source of carbohydrate energy, useful around training for topping up glycogen.
Log the grapefruit in two seconds
MacroDrop tracks all of these nutrients — core and extended — from a photo, your voice or a barcode. Offline USDA database, 7,800 foods.
Values come from the USDA FoodData Central entry Grapefruit, raw, pink and red and white, all areas (FDC ID 173033), per 100 g. Daily values follow the FDA 2,000 kcal reference. Last reviewed August 2026.