Shop› Food & Grocery› Baking Soda› Baking Soda – Frontier Co-op
Frontier Co-op Baking Soda
Frontier Co-op Baking Soda
Frontier Co-op Baking Soda — view 2
Frontier Co-op Baking Soda — view 3
Frontier Co-op Baking Soda — view 4
Food & Grocery Baking Soda

Baking Soda

By Frontier Co-op

Buy Direct →

Health & Certification Facts

  • USP Grade #1 — United States Pharmacopeia, the highest commercial purity standard for sodium bicarbonate
  • Naturally mined nahcolite — no chemical synthesis, no industrial processing
  • Non-irradiated — never treated with ionizing radiation or ethylene oxide (ETO)
  • Kosher certified
  • Single ingredient — pure sodium bicarbonate, nothing added
  • No additives, no anti-caking agents, no fillers
  • Member-owned cooperative since 1976 — committed to purity and ethical sourcing
Buy Direct →

Our Evaluation

Why We Chose Frontier Co-op

We chose Frontier Co-op Baking Soda because it is USP Grade #1 — the United States Pharmacopeia's highest commercial purity standard for sodium bicarbonate — sourced from naturally mined nahcolite deposits with no chemical synthesis and no additives of any kind. It is the strongest purity specification available for a consumer baking soda product.

Frontier Co-op has been a member-owned cooperative since 1976. Their commitment to never irradiating products and never treating them with ethylene oxide — a chemical sterilant found as a contaminant in some supplement products — is a documented, standing policy across their entire product line. The USP Grade #1 specification means the raw material itself meets pharmaceutical-grade purity requirements, not just food-safe standards.

We are transparent about what we do not know: no US baking soda brand currently has published independent third-party heavy metals testing with non-detect results from Lead Safe Mama, Mamavation, or a comparable independent program. This category has not been prioritized for independent testing. This is reflected in the Verified score. Within the constraints of what is currently verifiable, Frontier Co-op's USP Grade #1 specification is the strongest quality claim available.

Per Frontier Co-op

  • USP Grade #1 — United States Pharmacopeia highest commercial purity standard for sodium bicarbonate
  • Naturally mined nahcolite from a mined source — no chemical synthesis
  • Non-irradiated and never treated with ETO (ethylene oxide)
  • Kosher certified
  • Single ingredient — pure sodium bicarbonate, nothing added or removed
  • Member-owned cooperative since 1976 with documented commitment to purity and ethical sourcing
Buy Direct →

Honest Transparency Note

  • No published independent third-party heavy metals testing results are publicly available for Frontier Co-op Baking Soda specifically
  • The entire US baking soda category has not been independently tested for lead, cadmium, mercury, and arsenic by Lead Safe Mama, Mamavation, or comparable investigators as of May 2026
  • USP Grade #1 means the raw material meets pharmaceutical-grade purity specifications — this is a meaningful standard, but it is not the same as published independent lab results with non-detect results for specific heavy metals
  • Nahcolite deposits in the Piceance Creek Basin of Colorado — the source of naturally mined US sodium bicarbonate — are among the purest natural sodium bicarbonate deposits in the world

Bonham Gold Label Evaluation

Purity Profile

Chemicals & Toxins 5/5
No additives, no anti-caking agents, no fillers, no processing aids of any kind. Never treated with ethylene oxide — a chemical sterilant found as a contaminant in some supplement products. Single ingredient. Frontier Co-op's documented policy of never using ETO or irradiation across their entire product line is a meaningful and verifiable commitment.
GMO 5/5
Sodium bicarbonate is a mineral — GMO is not applicable as a concern. Scored 5 to confirm explicitly that no GMO inputs are involved in any aspect of this product's production.
Verified 3/5
USP Grade #1 is a meaningful pharmaceutical-grade purity specification and Kosher certification provides additional third-party verification. Scored 3 rather than higher because no published independent heavy metals testing results are available for this specific product, and the baking soda category as a whole has not been independently tested by Lead Safe Mama, Mamavation, or comparable programs as of May 2026.
Purity 5/5
USP Grade #1 is the highest commercial purity standard for sodium bicarbonate — the same standard required for pharmaceutical applications. Naturally mined nahcolite with no chemical synthesis and no additives. Single ingredient. The highest purity specification available for a consumer baking soda.
Heavy Metals N/A
No published independent heavy metals testing is available for this product. USP Grade #1 includes purity specifications that address heavy metal limits at the pharmaceutical standard level, but individual test results by specific metal are not published publicly for consumer baking soda products. Not scored due to absence of published data.
Pesticides N/A
Not applicable. Sodium bicarbonate is a mineral — pesticide contamination is not a relevant concern for this product type.
Microplastics N/A
Not applicable. Not a known concern for naturally mined sodium bicarbonate in appropriate packaging.
Mold N/A
Not applicable. Sodium bicarbonate is itself an antifungal agent — mold cannot grow in a dry sodium bicarbonate environment.
Yeast N/A
Not applicable. Yeast contamination is not a concern for dry sodium bicarbonate.

Contaminant Status

What We Know About This Product

A transparent breakdown of every contaminant category and what is known — or not known — about this specific product.

Chemicals & Toxins
No additives, no anti-caking agents, no fillers. Never treated with ethylene oxide or irradiation — Frontier Co-op's documented standing policy. Single ingredient: pure sodium bicarbonate.
Heavy Metals
USP Grade #1 includes pharmaceutical-grade purity limits for heavy metals, but individual published test results by specific metal are not publicly available. No independent third-party testing by Lead Safe Mama or Mamavation on record for any US baking soda brand as of May 2026.
Pesticides
Not applicable. Sodium bicarbonate is a mineral — pesticide contamination is not a relevant concern for this product type.
GMO
Not applicable. Sodium bicarbonate is a mineral with no biological origin — GMO contamination is not possible.
Mold
Not applicable. Sodium bicarbonate is itself antifungal — mold cannot grow in a dry baking soda environment.
Microplastics
Not applicable. Not a known concern for naturally mined sodium bicarbonate in appropriate packaging.

Ready to Try Frontier Co-op Baking Soda?

USP Grade #1 naturally mined nahcolite. No additives, no anti-caking agents, never irradiated or treated with ETO. The highest purity specification available for consumer baking soda.

Buy Direct →

Continue Reading

Related Blog Posts

Vera Salt
New Product · Salt
Why We Chose Vera Salt
The Bonham Family · May 28, 2026
Jovial Flour
New Product · Flour
Why We Chose Jovial Einkorn Flour
The Bonham Family · May 29, 2026
Blog
Bonham Brands
Who We Are and Why We Started Bonham Brands
The Bonham Family · May 19, 2026