Disclaimer
Nutritional values may vary based on growing conditions and apple size. This article is for informational purposes only and not a substitute for medical or dietary advice.
Crisp, tart, and refreshingly bright, the Granny Smith apple stands out among all apple varieties for its unique flavor and impressive nutritional profile. Recognized for its vivid green skin and firm texture, this apple isn’t just delicious — it’s also one of the healthiest snack options available.
Understanding Granny Smith apple nutrition reveals why it’s often recommended for weight control, digestive health, and blood sugar balance. Whether eaten raw, baked, or sliced into salads, it’s a fruit that delivers both taste and wellness benefits.
What Is a Granny Smith Apple?
The Granny Smith apple originated in Australia in the 1860s, discovered by Maria Ann (Granny) Smith. Today, it’s grown worldwide and known for its tangy flavor, long shelf life, and versatility in both sweet and savory recipes.
Compared to sweeter apples like Fuji or Gala, Granny Smith apples contain less sugar and more acidity, making them a popular choice for those managing calorie or sugar intake.
Granny Smith Apple Nutrition Facts (Per 100 g / About 1 Medium Apple)
| Nutrient | Amount |
|---|---|
| Calories | 57 kcal |
| Total Fat | 0.2 g |
| Saturated Fat | 0 g |
| Carbohydrates | 13.6 g |
| Sugars | 10.4 g |
| Dietary Fiber | 2.8 g |
| Protein | 0.3 g |
| Sodium | 1 mg |
| Potassium | 116 mg |
| Vitamin C | 5.3 mg (6% DV) |
| Vitamin A | 3 µg |
| Vitamin K | 2.2 µg |
| Folate | 3 µg |
| Calcium | 6 mg |
| Iron | 0.1 mg |
| Magnesium | 5 mg |
| Water Content | 85% |
DV = Daily Value, based on a 2,000-calorie diet.
Calories in a Granny Smith Apple
A medium Granny Smith apple (about 182 g) contains approximately 95 calories.
Most of its calories come from natural fruit sugars and carbohydrates. However, its fiber and water content make it extremely filling for its calorie level — an ideal choice for those seeking a light yet satisfying snack.
Granny Smith apples are naturally lower in sugar than most other apple varieties, making them suitable for low-sugar diets.
Carbohydrates and Sugar
Each 100 grams of Granny Smith apple provides 13–14 grams of carbohydrates, primarily as natural fructose, glucose, and sucrose.
The sugar content is lower compared to sweeter varieties like Honeycrisp or Gala, which can exceed 16–18 grams per 100 g.
With a low glycemic index (GI ~39), Granny Smith apples release sugar slowly into the bloodstream, making them an excellent fruit choice for people with diabetes or insulin resistance.
Fiber Content
Granny Smith apples are an excellent source of dietary fiber, providing 2.8–4.5 grams per medium apple.
This fiber — primarily pectin, a type of soluble fiber — offers several health benefits:
- Improves digestion
- Supports healthy gut bacteria
- Aids in cholesterol regulation
- Promotes satiety and weight control
Eating the skin is crucial, as nearly half the fiber is located there.
Vitamins in Granny Smith Apples
- Vitamin C (Ascorbic Acid)
- Supports immunity and skin health
- Acts as an antioxidant to combat cell damage
- One apple provides roughly 6–8% of the daily recommended intake
- Vitamin K
- Aids in blood clotting and bone strength
- Vitamin A (Beta-Carotene)
- Promotes eye and skin health
- Folate (Vitamin B9)
- Supports cell division and red blood cell formation
These vitamins make Granny Smith apples an easy way to add a gentle nutrient boost to your daily routine.
Minerals in Granny Smith Apples
| Mineral | Function | Amount (Per 100 g) |
|---|---|---|
| Potassium | Regulates blood pressure and heart rhythm | 116 mg |
| Calcium | Strengthens bones and teeth | 6 mg |
| Magnesium | Supports muscle and nerve function | 5 mg |
| Iron | Helps oxygen transport | 0.1 mg |
| Phosphorus | Supports metabolism and bones | 12 mg |
Potassium is the most notable mineral in apples, contributing to heart health and electrolyte balance.
Antioxidants and Phytonutrients
Granny Smith apples are rich in polyphenols and flavonoids, compounds that protect cells from oxidative stress.
Major antioxidants include:
- Quercetin: Helps reduce inflammation and supports immune function.
- Catechin: Improves blood flow and brain function.
- Chlorogenic Acid: Linked to better glucose metabolism.
- Phloridzin: Unique to apples, helps balance blood sugar levels.
These natural compounds have been studied for their potential role in reducing the risk of chronic diseases such as heart disease and type 2 diabetes.
Water Content and Hydration
With 85% water, Granny Smith apples contribute to daily hydration needs while delivering fiber and micronutrients.
Their crisp texture and water content also make them a refreshing, satisfying snack that can curb cravings between meals.
Granny Smith Apples and Weight Management
Due to their low calorie, high fiber, and low sugar profile, Granny Smith apples are one of the best fruits for weight management.
Research published in Food Chemistry found that Granny Smith apples specifically promote the growth of healthy gut bacteria, improving metabolism and reducing fat accumulation compared to sweeter apple types.
They also score high on the satiety index, meaning they keep you full longer than other snacks of equal calories.
Blood Sugar Control and Diabetes
The pectin fiber and polyphenols in Granny Smith apples help regulate blood sugar by:
- Slowing glucose absorption
- Reducing insulin spikes
- Enhancing gut microbial balance
Because of their lower sugar and low GI, they are a preferred apple variety for diabetics and pre-diabetics when eaten in moderation.
Heart Health Benefits
Granny Smith apples contribute to cardiovascular health in several ways:
- Soluble fiber helps lower LDL (“bad”) cholesterol.
- Antioxidants prevent oxidative stress in blood vessels.
- Potassium supports normal heart rhythm.
- Regular consumption is associated with a reduced risk of stroke and heart disease.
Replacing sugary desserts or snacks with apples can have a direct positive impact on heart health.
Digestive Health Benefits
Thanks to pectin and natural enzymes, Granny Smith apples:
- Promote regular bowel movements
- Feed beneficial gut bacteria (prebiotic effect)
- Support nutrient absorption
When eaten daily, they contribute to overall gut balance and reduce bloating caused by irregular digestion.
Skin and Immune Support
The Vitamin C and polyphenols in Granny Smith apples protect the skin from free radical damage and support collagen production, leading to healthier, firmer skin.
These compounds also strengthen immune defenses, especially during seasonal changes when antioxidant needs are higher.
Cooking and Usage
Granny Smith apples retain their texture and tartness when cooked, making them excellent for:
- Baking pies, crisps, and muffins
- Adding to salads or slaws
- Roasting with vegetables or meat dishes
- Juicing or blending into smoothies
Their firm texture prevents them from turning mushy during heat exposure.
Storage and Shelf Life
- Store apples in the refrigerator crisper drawer for freshness up to 3–4 weeks.
- Keep away from strong-smelling foods to avoid odor absorption.
- Do not wash before storing — rinse just before eating.
Refrigeration slows ripening and preserves their crispness longer than room temperature storage.
Granny Smith vs Other Apple Varieties
| Variety | Calories (100 g) | Sugar | Fiber | Vitamin C | Taste |
|---|---|---|---|---|---|
| Granny Smith | 57 kcal | 10 g | 2.8 g | 5.3 mg | Tart |
| Gala | 61 kcal | 13 g | 2.3 g | 4.6 mg | Sweet |
| Fuji | 63 kcal | 16 g | 2.1 g | 3.9 mg | Very Sweet |
| Honeycrisp | 59 kcal | 14 g | 2.8 g | 6.0 mg | Sweet-Tart |
Granny Smith is the lowest in sugar and among the highest in fiber, making it the most diet-friendly option.
Health Benefits Summary
- Supports Weight Control: High fiber and low sugar reduce hunger and calorie intake.
- Stabilizes Blood Sugar: Low GI and polyphenols help manage glucose levels.
- Boosts Gut Health: Pectin acts as a prebiotic.
- Promotes Heart Health: Fiber and antioxidants protect cardiovascular function.
- Improves Skin and Immunity: Vitamin C enhances repair and defense.
Potential Drawbacks
- Acidity:
The tartness may irritate sensitive teeth or acid reflux conditions when eaten in excess. - Pesticide Residue:
Apples often appear on the Environmental Working Group’s Dirty Dozen list, so washing thoroughly or choosing organic is advised. - Allergies:
Rarely, people sensitive to birch pollen may react to raw apples (oral allergy syndrome). Cooking usually neutralizes this effect.
Quick Recap of Granny Smith Apple Nutrition
| Nutrient | Value (Per 100 g) |
|---|---|
| Calories | 57 kcal |
| Carbohydrates | 13.6 g |
| Fiber | 2.8 g |
| Sugars | 10.4 g |
| Protein | 0.3 g |
| Fat | 0.2 g |
| Vitamin C | 5.3 mg |
| Potassium | 116 mg |
| Water Content | 85% |
The Bottom Line
Granny Smith apples are among the healthiest fruits you can eat — low in sugar, high in fiber, and full of beneficial antioxidants.
Their crisp texture and tart flavor make them ideal for both fresh snacking and cooking, while their nutritional profile supports heart health, digestion, and weight balance.
Whether you’re managing blood sugar, looking for a low-calorie snack, or simply want a refreshing fruit option, the Granny Smith apple is a timeless, nutritious choice.