Structured Nutritional Data & Citations
Blackberry (Rubus fruticosus agg.) Nutritional Profile
1. Macrontutrients & Energy Content
| Nutrient | Per 100g (Raw) | Per Standard Serving (1 cup, ~144g Raw) |
|---|---|---|
| Energy | 43 kcal (180 kJ) | 62 kcal (259 kJ) |
| Protein | 1.39 g | 2.00 g |
| Total Fat | 0.49 g | 0.71 g |
| Saturated Fat | 0.016 g | 0.023 g |
| Monouns. Fat | 0.043 g | 0.062 g |
| Polyuns. Fat | 0.283 g | 0.408 g |
| Carbohydrates | 9.61 g | 13.84 g |
| Fiber, total | 5.3 g | 7.6 g |
| Sugars, total | 4.88 g | 7.03 g |
2. Key Micronutrients
| Micronutrient | Per 100g (Raw) | Per Standard Serving (1 cup, ~144g Raw) | RDI (%)* (Adult) | Primary Functional Role |
|---|---|---|---|---|
| Vitamins | ||||
| Vitamin C | 21 mg | 30.2 mg | 23-33% | Antioxidant, collagen synthesis, immune function |
| Vitamin K | 19.8 µg | 28.5 µg | 17-24% | Blood clotting, bone metabolism |
| Vitamin A (RAE) | 11 µg | 16 µg | 1-2% | Vision, immune function, cell growth |
| Folate (B9) | 25 µg | 36 µg | 6-9% | Cell growth, DNA synthesis |
| Minerals | ||||
| Manganese | 0.646 mg | 0.930 mg | 28-52% | Bone health, antioxidant defense |
| Copper | 0.160 mg | 0.230 mg | 18-26% | Energy production, iron metabolism, nervous system |
| Magnesium | 29 mg | 42 mg | 7-10% | Muscle and nerve function, blood glucose control, blood pressure regulation |
| Potassium | 162 mg | 233 mg | 3-5% | Fluid balance, nerve signals, muscle contractions |
| Antioxidants | ||||
| Anthocyanins | High | Very High | N/A | Anti-inflammatory, cardioprotective, neuroprotective |
| Ellagic Acid | High | Very High | N/A | Antioxidant, anti-cancer properties |
| Gallic Acid | Moderate | Moderate | N/A | Antioxidant, antimicrobial |
*RDI (%) based on average adult recommendations; actual percentages vary by age, sex, and individual needs.
3. Functional Impact
- Glycemic Index (GI): Low (GI ≈ 25)
- Reference: 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.
- Glycemic Load (GL) per serving: Very Low (GL ≈ 2-3 per 1 cup serving)
- Reference: Ibid. Due to high fiber content, effective carbohydrate absorption is slow, leading to minimal blood glucose spikes.
- Satiety Score: High
- High fiber content (5.3g/100g) promotes gastric distension and slows digestion, contributing to prolonged feelings of fullness.
- Reference: Slavin, J. L., & Green, H. (2007). Dietary fibre and satiety. Nutrition Bulletin, 32(S1), 32-42.
4. Physical Properties
- Density (g/cm³):
- Fresh, Whole Berries: 0.65 - 0.72 g/cm³
- Reference: USDA FoodData Central, SR Legacy FDC ID: 1102603 (analysis of raw fruit characteristics).
- Fresh, Whole Berries: 0.65 - 0.72 g/cm³
- Volumetric Contraction after Cooking:
- Stewed/Sauce: Approximately 25-40% reduction in volume due to water loss and cell wall collapse, depending on cooking duration and added liquid.
- Jam/Preserve: Up to 50-60% reduction in initial raw berry volume, post-processing.
- Reference: Internal NutriSnap R&D Lab Data, 2023.
5. Citations & References
- USDA FoodData Central: SR Legacy FDC ID: 1102603, "Blackberries, raw." U.S. Department of Agriculture, Agricultural Research Service. (Accessed: 2023-10-27).
- 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.
- Slavin, J. L., & Green, H. (2007). Dietary fibre and satiety. Nutrition Bulletin, 32(S1), 32-42.
- Internal NutriSnap R&D Lab Data, 2023. (Proprietary data on food processing impact).
Field Notes: Dr. Aria Vance
Subject: Blackberry
Focus: Volumetric expansion/contraction, historical context, tracking challenges.
The Elusive Nature of Blackberry Tracking
Dr. Aria Vance, Lead Nutrition Data Scientist, NutriSnap
Blackberries. Nature's wild, dark jewels. A culinary delight, historically revered, but a veritable nightmare for precise nutritional tracking. They're more than just a fruit; they're a narrative, deeply woven into the tapestry of human history. From the ancient Greeks using their leaves to treat gout, to Native American tribes incorporating them into pemmican for sustenance and remedies for upset stomachs, their influence runs deep. They symbolize wild abundance, the tenacious spirit of the land, clinging to thorny brambles that seem to defy human cultivation, yet yield such sweetness.
And that's precisely the rub. The "wildness" is the problem. A barcode scanner? Utterly useless unless you're buying a pre-packaged, uniform punnet, which often means an inferior, less flavorful berry to begin with. "One cup," the standard serving suggestion, is a comedic illusion when it comes to these guys. Try it. Pack a cup with wild, irregular blackberries. Now try again with cultivated, perfectly round ones. The air pockets, the variation in size, the interstitial spaces – they create discrepancies that would make a statistician weep. A cup of densely packed, smaller wild berries will have a vastly different nutrient profile and caloric count than a loosely filled cup of larger, airier cultivated ones. It's a quantitative black hole!
Who, I ask you, is weighing out individual berries on a kitchen scale before breakfast? Or attempting to account for the juice that inevitably stains your fingers, representing a measurable loss of both weight and the precious anthocyanins we laud so readily? The entire premise of manual logging collapses under the sheer, delightful, infuriating irregularity of a handful of blackberries. They are a nutritional chameleon, each specimen subtly different, influenced by soil, sun, even the specific Rubus species or hybrid—loganberry, marionberry, boysenberry. A dietary tracker's Rubik's Cube.
This is why traditional methods are fundamentally flawed, a Sisyphean task leading only to frustration and imprecise data. It's not just about macros; it's about the manganese, the Vitamin K, the critical fiber, all subtly fluctuating with ripeness, size, and hydration. We need accuracy. We crave insights. We simply cannot get it with a measuring cup and a prayer.
And that's why NutriSnap is so revolutionary. Our AI, through forensic visual analysis, doesn't guess at the volume of a blackberry. It sees the blackberry. It accounts for its irregular shape, its color (indicating ripeness), its relative size within the bowl. It learns the nuances of different varietals from a vast dataset. It reconstructs the 3D volume, inferring mass and thus, nutrients, with an unprecedented degree of precision that manual methods could only ever dream of. Finally, the ghost in the machine of manual logging is exorcised, replaced by intelligent, visual truth.
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