NUTRITIONAL LOG

The Truth About Tempeh

A Deep-Research Journal

Dr. Aria Vance
Dr. Aria Vance Lead Nutrition Data Scientist
Last Reviewed: Jun 3, 2026 • Data Sources: USDA FoodData Central, NutriSnap Volumetric Models

Structured Nutritional Journal

Tempeh - Nutritional Profile

Energy
192 kcal
Protein
19 g
36% of calories
Carbohydrates
9 g
Fiber: 6.00 Sugars: 0.10
Fat
11 g
Saturated: 4.90 Trans: 0g

Calorie Distribution Ratio

Protein (36%)
Carbs (17%)
Fat (47%)

Key Micronutrients

Riboflavin (B2): ~0.28 mg (22% DV) - Essential for energy metabolism. Niacin (B3): ~2.6 mg (16% DV) - Supports cell function. Vitamin B6: ~0.2 mg (12% DV) - Important for brain development and immune function. Folate (B9): ~30 mcg (8% DV) - Crucial for cell growth and DNA formation. Vitamin K: ~20 mcg (17% DV) - Important for blood clotting and bone health. 💎 Manganese: ~2.6 mg (113% DV) - Potent antioxidant, involved in bone formation. 💎 Copper: ~0.4 mg (44% DV) - Essential for iron metabolism and red blood cell formation. 💎 Iron: ~2.7 mg (15% DV) - Vital for oxygen transport. 💎 Magnesium: ~80 mg (19% DV) - Involved in over 300 enzymatic reactions. 💎 Phosphorus: ~270 mg (22% DV) - Key for bone health and energy storage. 💎 Zinc: ~1.1 mg (10% DV) - Supports immune function and wound healing. 💎 Calcium: ~90 mg (7% DV) - Crucial for bone and teeth structure.

Biochemical Impact

Glycemic Index (GI) Low (estimated 30-40) - Due to high fiber and protein content, resulting in slow glucose absorption.
Glycemic Load (GL) Low (estimated <5 per standard serving) - Supports stable blood sugar levels.
Satiety Score High - The combination of protein, fiber, and healthy fats promotes sustained feelings of fullness and reduces subsequent caloric intake.

Physical Volumetrics

Density: 1.05 - 1.15 g/cm³ (Varies slightly based on hydration and compaction).
Volumetric Contraction/Expansion: Frying/Baking: 5-10% (Primarily due to moisture loss and slight compression).

Citations & References

  • Vitamins:
    • Riboflavin (B2): ~0.28 mg (22% DV) - Essential for energy metabolism.
    • Niacin (B3): ~2.6 mg (16% DV) - Supports cell function.
    • Vitamin B6: ~0.2 mg (12% DV) - Important for brain development and immune function.
    • Folate (B9): ~30 mcg (8% DV) - Crucial for cell growth and DNA formation.
    • Vitamin K: ~20 mcg (17% DV) - Important for blood clotting and bone health.

Field Notes: Dr. Aria Vance

Subject: Tempeh
Focus: Volumetric expansion/contraction, historical context, tracking challenges.

The Manual Tracking Problem with Tempeh

Dr. Aria Vance, Lead Nutrition Data Scientist, NutriSnap

Tempeh. Ah, tempeh. Ancient wisdom, really. This fermented soybean block from Indonesia is more than just a meat substitute; it's a testament to microbial alchemy. For centuries, Javanese households have leveraged the humble Rhizopus oligosporus fungus, coaxing it to bind soybeans into this dense, mycelial cake. It's a protein powerhouse, packed with bioavailable nutrients, deeply woven into the island's culinary fabric long before "plant-based" was a hashtag. Its story, rich and earthy, feels like the very texture of the food itself.

Yet, despite its nutritional superiority and fascinating cultural journey, logging tempeh in a manual nutrition tracker? A Sisyphean task. It drives me absolutely batty. You look at a block of tempeh, right? A seemingly uniform brick. But uniformity? An illusion, my friends. A cruel, nutritional illusion!

Consider the sheer variability. You've got your standard soybean tempeh, sure. But then there's mixed grain tempeh, chickpea tempeh, even black bean versions. Each recipe, a different macro profile. A different density, even. How do you account for that barcode, often generic, against the artisanal block from the farmer's market? You can't.

And then the preparation! My god, the preparation. Do you steam it, a gentle introduction to its new life, where it barely loses any mass and retains its inherent water? Or do you pan-fry it in a glorious glug of olive oil, where it drinks up fat like a parched camel in the desert? You know, the crispy edges, the golden-brown crust. Delicious, yes. But a nutritional nightmare to quantify. The oil absorption alone can swing the caloric value wildly. It’s not a simple multiplication problem; it’s a dynamic interplay of heat, time, and surface area. Are we weighing the oil before and after? Seriously, who has time for that? We're trying to eat, not perform a lab experiment for every single meal.

Then there's the cutting. Every kitchen, a different approach. Some people meticulously cube it. Others crumble it. Some slice it thin, like paper, perfect for quick crisping. Each shape presents a different surface-area-to-volume ratio, affecting marinade absorption, cooking time, and moisture loss. You glance at your plate, see "about a cup" of crumbled tempeh, and you're just guessing. A well-intentioned guess, but still a wild, data-corrupting guess. The standard serving sizes are for a plain, raw block. Your delicious, marinated, air-fried tempeh? That's a whole different animal. It’s like trying to measure water with a sieve. Utterly futile.

The entire process, from package to plate, transforms this otherwise incredibly healthy food into a phantom on your nutrition log. It's frustrating. The sheer number of variables makes accurate manual tracking, frankly, impossible for the average person striving for mindful eating. It's why so many give up. This persistent gap, this yawning chasm between aspiration and execution, is exactly what we at NutriSnap set out to conquer. Our AI, with its forensic visual analysis, looks at your cooked tempeh, on your plate, accounting for its form, its perceived crispness, its surrounding oil sheen. Finally, someone cracked the code.

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