Matcha Tea Benefits: What Science Says (and Doesn't)
Everything is said about matcha: that it helps you lose weight, that it cures, that it is a magical superfood. We have been importing and drinking it daily for years, so we are going to do something unusual in this sector: tell you which benefits of matcha tea have real scientific backing, with studies and their figures, and what things should be taken with caution. No hype.
First, the basics: matcha is green tea made from shade-grown leaves, ground whole into a very fine powder. Unlike infusions —where the tea bag is thrown away with most of the nutrients inside— with matcha, you drink the entire leaf. That's why its nutritional values are several times higher than those of conventional green tea.
The 5 benefits with studies behind them
1. Concentration, memory... and better sleep
A study by the University of Tsukuba followed 99 adults between 60 and 85 years old who consumed 2g of matcha daily for 12 weeks. The matcha group showed significant improvements in attention and short-term memory compared to the placebo — and, contrary to what might be expected from a caffeinated drink, it also improved sleep quality. The credit goes to L-theanine, an amino acid almost exclusive to tea that promotes relaxation without drowsiness.
2. Measurably less stress (not just a feeling)
The Japanese National Agriculture and Food Research Organization (NARO) subjected 60 adults aged 30 to 50 to social stress tests: those who drank 2g of matcha daily for 8 weeks reduced their cortisol —the stress hormone— by 20% compared to the control group. In individuals who described themselves as highly anxious, the ability to cope with stressful situations improved by 35%.
3. More hydrated and elastic skin
At Osaka University, 45 women with dry skin drank matcha daily for 12 weeks: skin hydration improved by 23%, transepidermal water loss decreased by 15%, and elasticity increased by 18%. If you're interested in this aspect —including homemade masks—, we cover it in full in our guide to matcha tea for the skin.
4. Heart: cholesterol and blood pressure
A Nestlé Japan trial with 120 adults with elevated LDL cholesterol recorded, after 12 weeks of daily consumption, an average 11% reduction in LDL ("bad" cholesterol), improved arterial elasticity in almost half of the participants, and a 10% decrease in systolic blood pressure in those over 50.
5. Antioxidants: the case of EGCG
Matcha's star antioxidant is epigallocatechin gallate (EGCG), the most studied catechin in green tea. In laboratory research by NARO, EGCG inhibited the growth of cancer cells in culture and reduced tumor size in mice. Let's be honest about what this means: these are preliminary in vitro and animal results, not a medical promise for humans — but they explain why the scientific community is so interested in matcha, and they add to studies on its protective effect on the liver and kidney published in journals such as the American Journal of Clinical Nutrition.
Nothing on this page is medical advice. If you have a health condition, are taking medication, or are pregnant, consult your doctor before changing your caffeine intake.
Matcha nutritional table
Values per 100g of powder according to the USDA database — and, more usefully, what a real cup (2g) provides:
| Nutrient | Per 100g | Per cup (2g) |
|---|---|---|
| Calories | 285 kcal | ~6 kcal |
| Protein | 20 g | 0.4 g |
| Fiber | 34 g | 0.7 g |
| Carbohydrates | 20.5 g | 0.4 g |
| Vitamin C | 60 mg | 1.2 mg |
| Vitamin E | 42.4 mg | 0.8 mg |
| Vitamin K | 1,380 mcg | 27.6 mcg |
| Iron | 17.6 mg | 0.35 mg |
| Potassium | 2,700 mg | 54 mg |
| Caffeine | 2.4 g | ~48 mg |
| L-theanine | 1.6 g | ~32 mg |
| Catechins (EGCG and others) | 1.06 g | ~21 mg |
Note the detail almost no one mentions: a cup is 6 calories and zero sugar. What makes matcha "caloric" is what some people add to it afterwards.
Caffeine, yes, but without jitters
A cup of matcha (2g) contains about 48mg of caffeine — approximately half that of coffee. The difference is not only in quantity but also in the curve: L-theanine slows its absorption, so instead of the peak-and-crash of coffee, you get 3-4 hours of stable energy, without tachycardia or nervousness. This is the famous "calm alertness" state that Zen monks have been using for centuries to meditate. We explain it in depth in how matcha's energy works, and if you follow a ketogenic diet, we have a specific guide on matcha and keto diet (spoiler: 0.4g of carbohydrates per cup doesn't break anything). We also answer a very sought-after question: the relationship between matcha and collagen.
Does it matter if it's organic?
With matcha, more than with almost any other food: you drink the entire ground leaf, so any pesticide residue goes directly into your cup, unfiltered and without a tea bag. That's why our ceremonial matcha carries European organic certification and USDA Organic, verifiable on the packaging itself. If you're comparing brands, in our comparison of matcha prices and qualities in Spain, we analyze 10 options by €/100g — with certification included in the table.
The matcha these studies talk about
First harvest ceremonial organic, stone-ground to 5-10 microns, from the three Jingshan producing families we work with directly. 100 g — about 50 cups at €0.42 each.
Frequently asked questions
What is matcha tea good for, in summary?
For stable energy and concentration without the jitters of coffee, and as a concentrated source of antioxidants. Studies also point to measurable improvements in stress (cortisol -20%), memory, skin hydration, and LDL cholesterol with sustained daily consumption for about 8-12 weeks.
How many cups of matcha can I drink per day?
Between 1 and 3 cups (2g each) is a reasonable range for most adults: 48-144 mg of caffeine, far from the 400 mg daily limit set by health authorities. If you are sensitive to caffeine, avoid drinking it after mid-afternoon.
Does it have contraindications?
The contraindications are those associated with caffeine: caution during pregnancy, uncontrolled hypertension, severe anxiety, or interaction with certain medications. And an important nuance: drink it separately from main meals if you have anemia, because tannins hinder iron absorption. If in doubt, your doctor's advice is paramount.
What is the difference between the benefits of matcha and those of regular green tea?
The compounds are the same; the dose is not. By drinking the entire ground leaf, a cup of matcha provides several times more catechins, L-theanine, and nutrients than a green tea infusion, where most of these remain in the discarded leaf.