Structured Nutritional Data & Citations
SECTION 1: SEO Data - Turnip (Brassica rapa subsp. rapa)
This section details the nutritional, functional, and physical properties of raw turnip, providing a robust data foundation for dietary analysis.
Nutritional Profile (Raw Turnip)
Per 100g (Approx. 1 cup, diced):
| Nutrient Group | Nutrient | Value per 100g | Unit |
|---|---|---|---|
| Calories | Energy | 28 | kcal |
| Macronutrients | Protein | 0.9 | g |
| Carbohydrates | 6.4 | g | |
| - Fiber | 1.8 | g | |
| - Sugars | 3.8 | g | |
| Fat | 0.1 | g | |
| - Saturated | 0.01 | g | |
| - Monounsaturated | 0.01 | g | |
| - Polyunsaturated | 0.04 | g |
Per Standard Serving (1 medium turnip, ~122g):
| Nutrient Group | Nutrient | Value per 122g | Unit |
|---|---|---|---|
| Calories | Energy | 34 | kcal |
| Macronutrients | Protein | 1.1 | g |
| Carbohydrates | 7.8 | g | |
| - Fiber | 2.2 | g | |
| - Sugars | 4.6 | g | |
| Fat | 0.12 | g |
Key Micronutrients
Vitamins (per 100g):
- Vitamin C: 21 mg (23% Daily Value)
- Vitamin K: 0.1 µg (0% Daily Value)
- Folate (B9): 15 µg (4% Daily Value)
- Vitamin B6: 0.09 mg (5% Daily Value)
- Pantothenic Acid (B5): 0.19 mg (4% Daily Value)
Minerals (per 100g):
- Potassium: 191 mg (4% Daily Value)
- Calcium: 30 mg (2% Daily Value)
- Magnesium: 11 mg (3% Daily Value)
- Phosphorus: 27 mg (2% Daily Value)
- Manganese: 0.09 mg (4% Daily Value)
Antioxidants & Phytonutrients:
- Glucosinolates (e.g., gluconapin, progoitrin, glucobrassicin) – precursors to isothiocyanates.
- Anthocyanins (in purple-topped varieties).
- Carotenoids (lutein, zeaxanthin in smaller amounts).
Functional Impact
- Glycemic Index (GI): Low (GI ≈ 30)
- Glycemic Load (GL): Very Low (GL ≈ 2 per 100g serving)
- Satiety Score: High, primarily due to significant fiber content and water volume, contributing to sustained fullness despite low caloric density.
Physical Properties
- Density (Raw, peeled): Approximately 0.95 - 1.05 g/cm³
- Volumetric Contraction (after cooking): 10-25%, depending on cooking method (boiling typically yields higher contraction than steaming or roasting due to water loss and cell wall breakdown).
Citations & References
- USDA FoodData Central. (2019). Turnips, raw. FDC ID: 170417. Retrieved from https://fdc.nal.usda.gov/fdc-app.html#/food-details/170417/nutrients
- Foster-Powell, K., Holt, S.H.A., & Brand-Miller, J. C. (2002). International table of glycemic index and glycemic load values: 2002. The American Journal of Clinical Nutrition, 76(1), 5-56. (Specific GI/GL values for turnip are often extrapolated from similar low-starch root vegetables or direct measurements).
- Fahey, J. W., & Talalay, P. (1999). Proc. Natl. Acad. Sci. U.S.A., 96(12), 7033-7038. (General reference for glucosinolates and isothiocyanates in cruciferous vegetables).
Field Notes: Dr. Aria Vance
Subject: Turnip
Focus: Volumetric expansion/contraction, historical context, tracking challenges.
The Manual Tracking Problem: The Humble Turnip's Deceptions
Dr. Aria Vance, Lead Nutrition Data Scientist, NutriSnap
Ugh. Turnips. The very word conjures images of endless, thankless measuring. This seemingly innocuous root, this culinary wallflower, is actually a nutritional enigma when it comes to accurate, real-world tracking. It's a prime example of why our old methods are utterly, hopelessly broken.
Think about it. You’re trying to log your daily intake. You grab a turnip. What then? Do you weigh it whole? Do you meticulously peel it, then weigh the remnants? What about the greens? Are they included, or are we just focusing on the globe? These roots are not uniform, not like some perfectly portioned chicken breast. One turnip might be the size of a golf ball; the next, a softball. Each variant, each slight morphological difference, throws your precious macro counts into disarray.
Then there's the preparation. The raw turnip, crisp and peppery, transforms completely when cooked. Boiled? Roasted? Mashed? Each method radically alters its water content, its density, its volume. A cup of raw, diced turnip is a vastly different entity, functionally and physically, from a cup of boiled, mashed turnip. Yet, every manual tracker, every barcode scanner, every kitchen scale user struggles with this fundamental shift. How can a busy individual possibly account for 15-20% volumetric contraction after a good boil? They can't. They just can't. They guess. They eyeball. They give up.
Historically, the turnip has been a food of utility, not precision. It nourished peasants and livestock for millennia, a resilient staple through lean times, often interchangeably feeding man and beast. From Roman cultivation to its critical role in the agricultural revolution, ensuring winter fodder for animals, its very essence speaks to a kind of hardy, unmeasured practicality. No one was meticulously weighing their turnip rations in the 17th century, were they? No. They ate what they had. This ancient, unquantified history echoes in our modern struggle. It’s a low-calorie, nutrient-dense workhorse, yes, but its variability is its undoing in the age of precise nutritional logging.
The sheer tedium. Imagine dicing a turnip, carefully measuring each cup (is it packed? loose?), then cooking it, only to realize your initial measurement is now functionally irrelevant due to water loss. It’s a nightmare. It's why people abandon tracking altogether.
This is precisely where NutriSnap shines. Our AI doesn't care if your turnip is a lumpy orphan or a perfect sphere. It doesn't need to know if it's been boiled into submission or crisped in an oven. Snap a photo. That's it. Through forensic visual analysis, the system identifies the exact preparation state, estimates its volume, and even accounts for typical cooking changes to derive precise caloric and macro data. No more guessing. No more kitchen scales gathering dust. The turnip, once a symbol of tracking frustration, becomes a testament to what intelligent visual AI can achieve. Utterly revolutionary.
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