NUTRITIONAL LOG

The Truth About Green Tea

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 Data & Citations

Journal Entry: Green Tea Nutritional Profile

SECTION 1: SEO Data

Green Tea (Brewed, Unsweetened)

This data pertains to green tea prepared with water, without added milk, sugar, or other ingredients.

1. Macronutrients & Energy (Per 100g / Per Standard Serving)

Nutrient Per 100g Brewed Tea (approx. 100 mL) Per Standard Serving (240mL) Unit
Energy 1 2 kcal
Protein 0.1 0.2 g
Total Fat 0 0 g
Carbohydrate 0.2 0.5 g
- Sugars 0 0 g
Fiber 0 0 g
Water 99.8 239.5 g

2. Key Micronutrients & Bioactive Compounds

Category Nutrient/Compound Per 240mL Serving (Approximate) Unit Key Functions
Vitamins Vitamin K (Phylloquinone) 2.4 µg Blood coagulation, bone metabolism.
Riboflavin (B2) 0.01 mg Energy metabolism, cellular growth.
Folate 5 µg DNA synthesis, cell repair.
Minerals Manganese 0.1 mg Bone health, antioxidant defense.
Fluoride 0.15 - 0.5 mg Dental health (variable by tea type/water source).
Potassium 20 mg Fluid balance, muscle contraction.
Antioxidants/Bioactives Catechins (Total) 100 - 400 mg Potent antioxidants, anti-inflammatory effects.
- Epigallocatechin gallate (EGCG) 60 - 200 mg Most abundant and studied catechin, strong antioxidant.
L-Theanine 20 - 60 mg Amino acid, promotes relaxation and focus, modulates caffeine effects.
Caffeine 20 - 50 mg Central nervous system stimulant, varies significantly by brew and tea type.
Quercetin Trace mg Flavonoid, antioxidant, anti-inflammatory.

3. Functional Impact

4. Physical Properties (Brewed Green Tea)

5. Citations & References

Field Notes: Dr. Aria Vance

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

SECTION 2: Field Notes

The Elusive Data of the Daily Brew

Dr. Aria Vance, Lead Nutrition Data Scientist, NutriSnap.

The verdant mystery. A cup of green tea. People herald it—rightly so—as a wellness elixir. From the serene tea ceremonies of Japan, where Gyokuro is meticulously prepared, to the everyday bags steeped casually across the globe, its journey is ancient. Originating in China thousands of years ago, Camellia sinensis leaves have been steeped for health, for ritual, for simple enjoyment. It traveled Silk Roads, fueled Zen monks, became a cornerstone of diverse cultures. This beverage, it's more than just a drink. It's history in a cup. A story of human connection to nature, to wellness.

But tracking it? Oh, the agony!

Imagine, a user logs "green tea." What does that mean? Is it Matcha, a powdered powerhouse, whisked into frothy suspension, where every particle is consumed? Or Sencha, delicate leaves steeped, then discarded? Bancha, a more robust, coarser leaf? Each type, each preparation method, fundamentally alters the extraction of those precious catechins, L-Theanine, even the trace minerals. The variables are maddening. Water temperature? Crucial! Too hot, bitterness. Too cold, under-extraction. Steeping time? Five seconds changes everything. Five minutes changes more. The dry weight of leaves used? A pinch? A heaped teaspoon? No two users, hell, no two brews from the same user, are identical.

Manual tracking falls flat on its face. How do you barcode a loose leaf? You can't. Weighing dry leaves before brewing gives you nothing about what actually ends up in the liquid. We tell users, "log one serving." But what's a serving? A tiny demitasse? A gargantuan travel mug? It's a nutritional ghost in the machine, a fluid, ever-changing entity. This isn't like a banana, which has a fairly consistent nutritional profile regardless of how you eat it. This is a dance of diffusion, a biochemical negotiation between leaf and water. And don't even get me started on the ubiquitous additions: a dollop of honey, a splash of oat milk. These seemingly innocent additions introduce significant caloric and macro changes that most users only log for the tea, completely missing the true impact. It's frustrating. It's unreliable. Our data, my beautiful data, becomes a chaotic mess of approximations and educated guesses.

This is why NutriSnap is a game-changer. Forensic visual analysis. Our AI doesn't just see "green tea"; it sees the depth of color, the consistency, the volume in the specific vessel. It learns user patterns: "Dr. Vance usually drinks a light Sencha in her ceramic mug." It can even infer the presence of likely additives based on opaqueness or color shifts, prompting the user for confirmation. No more guessing games about extraction rates or serving sizes. It's about capturing reality. This technology... it’s going to revolutionize dietary precision. Finally, the nuanced story of that everyday cup can be accurately told.

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