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Sencha Naturals Organic Matcha (Costco)

Common questions

Is Sencha Naturals Organic Matcha (Costco) healthy?

Sencha Naturals Organic Matcha (Costco) scores 55/100 on Scout's independent analysis of ingredients, additives, and lab results — a below-average score in Scout's analysis. Sencha Naturals Organic Matcha (sold at Costco) scores 55/100.

Has Sencha Naturals Organic Matcha (Costco) been lab-tested?

Yes. Sencha Naturals Organic Matcha (Costco) carries an independent laboratory panel from Lead Safe Mama covering 4 contaminants (including Lead, Arsenic, Cadmium) — the full results are on this page.

How processed is Sencha Naturals Organic Matcha (Costco)?

Sencha Naturals Organic Matcha (Costco) is NOVA Group 1: Unprocessed or Minimally Processed Foods.

How does Sencha Naturals Organic Matcha (Costco) compare to other matcha?

Sencha Naturals Organic Matcha (Costco) ranks #6 of 9 matcha in Scout's independent rankings. The current top score in the category is Cymbiotika Organic Ceremonial Grade Matcha at 96/100.

Which ingredients drive Sencha Naturals Organic Matcha (Costco)'s score?

In Scout's ingredient-by-ingredient analysis, Organic Japanese Green Tea Powder counts in its favor. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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Sencha Naturals Organic Matcha (Costco)

Sencha Naturals
Lab tested
55 Fair
$20.99 · 20 servings · $19.80 / ounce
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At a glance

Beneficial ingredients 1
Harmful ingredients 0
Owned by Sencha Naturals
Category Matcha
Summary

Sencha Naturals Organic Matcha (sold at Costco) scores 55/100. USDA Organic 100% Japanese green tea powder. Lead Safe Mama 3rd-party lab testing (April 2025) returned the HIGHEST mercury reading of any matcha in the chart — 7.7 ppb — along with 73 ppb lead, 12.5 ppb cadmium, and 22.1 ppb arsenic. Single ingredient, but the metal burden pulls the score down hard.

Contaminants 4

Source: Lead Safe Mama

Lead
73 ppb
High

Detected at a high level — at or above health-based exposure limits. Regular exposure at this level is a genuine health concern. No safe level of lead exposure per federal agencies.

Lead Safe Mama 3rd-party lab testing (April 2025) detected 73 ppb lead.

Arsenic
22.1 ppb
Low

A low level of arsenic — present but modest; a sourcing-quality note rather than a safety concern at typical intake.

Lead Safe Mama testing detected 22.1 ppb arsenic.

Cadmium
12.5 ppb
Trace

A trace amount of cadmium — within the range expected from normal soil uptake/processing and below our concern threshold.

Lead Safe Mama testing detected 12.5 ppb cadmium.

Mercury
7.7 ppb
Low

A low level of mercury — present but modest; a sourcing-quality note rather than a safety concern at typical intake.

Lead Safe Mama testing detected 7.7 ppb mercury — the HIGHEST mercury reading of any matcha tested in the April 2025 chart. The lab explicitly flags this as 'no safe level of mercury to consume.'

Key ingredients 1

Organic Japanese Green Tea Powder
Very Good

USDA Organic 100% Japanese green tea powder. Single-ingredient NOVA 1 food — minimally processed with antioxidant catechins, L-theanine, and chlorophyll.

See more about Organic Japanese Green Tea Powder →

Processing

Group 1 · Minimally processed

Unprocessed or Minimally Processed Foods

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