Structured Nutritional Data & Citations
SECTION 1: Nutritional and Physical Profile of Mackerel (Scomber scombrus)
1.1. Macroscopic Nutritional Data
| Metric | Per 100g (Cooked, Dry Heat) | Per Standard Serving (85g / 3 oz, Cooked, Dry Heat) |
|---|---|---|
| Energy (Calories) | 205 kcal | 174 kcal |
| Protein | 24.3 g | 20.7 g |
| Total Fat | 13.9 g | 11.8 g |
| Saturated Fat | 3.3 g | 2.8 g |
| Monounsaturated Fat | 3.4 g | 2.9 g |
| Polyunsaturated Fat | 4.6 g | 3.9 g |
| Omega-3 (EPA+DHA) | 2.67 g | 2.27 g |
| Total Carbohydrates | 0.0 g | 0.0 g |
| Dietary Fiber | 0.0 g | 0.0 g |
| Sugars | 0.0 g | 0.0 g |
Reference: USDA FoodData Central, SR Legacy Food Code 15077 (Mackerel, Atlantic, cooked, dry heat).
1.2. Key Micronutrients (Per 100g Cooked)
- Vitamins:
- Vitamin B12: 10.3 µg (429% DV)
- Vitamin D: 13.2 µg (66% DV)
- Niacin (B3): 8.8 mg (55% DV)
- Vitamin B6: 0.6 mg (35% DV)
- Riboflavin (B2): 0.3 mg (23% DV)
- Vitamin E: 0.7 mg (5% DV)
- Minerals:
- Selenium: 58.7 µg (107% DV)
- Phosphorus: 302 mg (24% DV)
- Magnesium: 30 mg (7% DV)
- Potassium: 363 mg (8% DV)
- Iodine: (Typically high, but not consistently available in USDA FDC for all entries; estimated 70-100 µg per 100g).
- Antioxidants: High concentrations of Omega-3 fatty acids (EPA, DHA) act as potent anti-inflammatory agents, indirectly functioning as antioxidants. Selenium is a cofactor for antioxidant enzymes like glutathione peroxidase.
Reference: USDA FoodData Central, SR Legacy Food Code 15077. Daily Values (DV) based on a 2,000 calorie diet.
1.3. Functional Impact
- Glycemic Index (GI): 0 (As a pure protein and fat source, mackerel has no direct impact on blood glucose).
- Glycemic Load (GL): 0
- Satiety Score: High (Fish generally ranks very high on satiety indices due to its high protein content and lean-to-moderate fat profile. Studies suggest fish can be 50-60% more satiating than white bread, per calorie).
- Reference: Holt, S. H. A., Miller, J. B., Petocz, P., & Farmakalidis, E. (1995). A satiety index of common foods. European Journal of Clinical Nutrition, 49(9), 675-690.
1.4. Physical Properties (Atlantic Mackerel)
- Density (Cooked, Flaked Fillet): Approximately 1.03 - 1.07 g/cm³. The density remains close to that of water, slightly varying based on fat content and moisture loss during cooking.
- Volumetric Contraction After Cooking (Dry Heat, Fillet): Estimated 10-15%. This contraction is primarily due to moisture loss and protein denaturation, causing the muscle fibers to tighten and expel water.
Reference: Based on general principles of food physics and protein denaturation; specific empirical data for cooked mackerel contraction is less standardized but falls within typical ranges for fish.
Field Notes: Dr. Aria Vance
Subject: Mackerel
Focus: Volumetric expansion/contraction, historical context, tracking challenges.
Why Mackerel Is Difficult to Track
Another Tuesday, another dive into the intricate, often maddening, world of nutritional data. Today, it’s the humble—yet mighty—mackerel. This isn't just a fish; it's a historical staple, a nutritional goldmine, and, frankly, a tracking nightmare.
Historically, mackerel has sustained coastal communities for millennia. Indigenous populations revered it. The Vikings? They practically lived on it, appreciating its rich fats for energy in harsh climates. Fast-forward to today, and it's a global culinary chameleon. Smoked, pickled, grilled, canned in brine or olive oil—the permutations are endless. Each method subtly, or not-so-subtly, shifts its nutrient profile and, more critically for tracking, its physical characteristics.
And there's the rub. The core problem with manual food tracking isn't a lack of information; it's the translation of that information into a real-world, plate-based scenario. Take our slippery beast, the mackerel. A client diligently notes "mackerel fillet." But what kind? Atlantic? King? Spanish? Each has a distinct fat profile. Was it raw weight or cooked? Pan-fried in butter? Broiled with lemon? That matters. That really matters. A 100-gram raw fillet might shrink to 85 grams after cooking, losing water but concentrating nutrients, particularly fats, if cooked in oil. Density changes. Volume changes.
Trying to track this manually is like herding cats in a fog. You get a barcode for a can of smoked mackerel. Great, but how much did you eat from that can? A third? Half? Eyeballing it is a fool's errand. Measuring cups? For flaked fish? Please. Scales are better, yes, but who's weighing every single component of their meal? Pre-cooking? Post-cooking? People just don't do it. They can't do it consistently. It’s too tedious, too disruptive to the simple act of eating. The average user quits, frustrated by the sheer impracticality of logging "3.2 oz pan-fried Atlantic mackerel (post-cook weight, estimated 0.5 tbsp olive oil absorption)." It’s absurd.
This perennial quagmire of estimation, this inherent human tendency to approximate, is precisely what drove the genesis of NutriSnap. Forget the scales, the guessing games, the endless database searches. A simple photo. Our AI, with its forensic visual analysis, recognizes the type of fish, estimates portion size based on plate context and known object scales, and even discerns probable cooking methods. It quantifies the formerly unquantifiable. Suddenly, the nuanced complexity of a mackerel meal, from a rustic grilled fillet to a delicate canned pate, becomes a precise, trackable data point. It’s not just tracking; it’s seeing the invisible.
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