Kiwi (Actinidia deliciosa), also known as the kiwifruit or Chinese gooseberry, is a vibrant green or gold fruit renowned for its sweet-tart flavor, delicate edible black seeds, and dense micronutrient profile. When assessing kiwi nutritional value per 100g, raw fresh green kiwi delivers roughly 61 calories, 14.7 grams of total carbohydrates, and over 83% water content, making it an energy-controlled, hydrating superfood. For an everyday dietary portion—commonly measured as one medium green kiwi (approx. 69 grams edible weight)—the caloric impact is just 42 calories and 10.1 grams of total carbohydrates, making it an optimal fruit for weight management, athletic diets, and metabolic health.

Dietary Fiber Matrix, Natural Sugars & Glycemic Control

The carbohydrate structure of kiwi features an advantageous balance of dietary fiber to natural fruit sugars. A single medium kiwi contains approximately 6.2 grams of natural sugars—primarily an even distribution of fructose and glucose—counterbalanced by 2.1 grams of dietary fiber (reaching 3.0g per 100g). A unique feature of kiwi fiber is its roughly 1:3 ratio of soluble to insoluble fiber, providing high water-holding capacity that promotes soft stool consistency and healthy bowel regularity. With an exceptionally low glycemic index (GI ~39 to 52) and a low glycemic load (~4 per fruit), kiwi yields a gradual, controlled blood glucose response without dramatic insulin surges.

Superior Vitamin C, Vitamin K & Micronutrient Potency

Kiwi consistently ranks among the most nutrient-dense fruits available, significantly exceeding many citrus fruits on a gram-for-gram basis:

• Vitamin C (Ascorbic Acid): Providing 92.7 mg per 100g and roughly 64 mg per single medium fruit, just one kiwi meets approximately 70–80% of the recommended daily intake (RDI). Vitamin C is a critical antioxidant that defends against lipid peroxidation, stimulates endogenous collagen synthesis for skin and joint integrity, modulates immune defense, and enhances intestinal non-heme iron absorption.

• Vitamin K (Phylloquinone): Supplying roughly 27.8 µg per medium fruit (nearly 30% of the daily value), kiwi is one of the richest fruit sources of Vitamin K, essential for blood coagulation cascades and the activation of osteocalcin for bone mineral density.

• Potassium & Electrolytes: Delivering 215 mg of potassium per medium kiwi (312 mg per 100g), it aids in balancing dietary sodium, supporting vascular tone, and maintaining fluid balance in muscle cells.

• Vitamin E & Folate (B9): Kiwi provides bioavailable Vitamin E (1.0 mg per fruit) located largely in the seeds and flesh, along with 17.2 µg of folate, aiding cellular DNA repair and tissue renewal.

Actinidin Enzyme, Sleep Optimization & Gut Motility

Kiwi provides unique clinical health benefits derived from its specialized phytochemicals and enzymes:

• Actinidin Proteolytic Enzyme: Raw kiwi contains actinidin, a natural protease enzyme that accelerates the breakdown of dietary proteins (such as beef, gluten, and soy) in the stomach and small intestine, preventing post-meal bloating and improving gastric emptying.

• Serotonin & Sleep Quality: Kiwi is one of the few natural fruits containing measurable amounts of serotonin, which clinical studies suggest can improve sleep onset, sleep duration, and overall sleep efficiency when consumed in the evening.

• Carotenoids & Eye Health: The deep green pigments contain lutein and zeaxanthin, macular carotenoids that accumulate in the retina to filter harmful blue light and reduce long-term oxidative stress on ocular tissues.